2005 Audi A4 Fuel and Emissions Systems

Name: Brake Vacuum Pump
Brand: Pierburg
SKU: N4050446713APG
Price: 242.86 USD

Below you will find various in-demand Audi Fuel and Emissions Systems, components and accessories for your 2005 A4. Advance Auto Parts has popular A4 parts like Air Flow Sensors, Oxygen Sensors, Gas Caps and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other A4 model years including 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 and more. Select a category of 2005 Audi A4 Fuel and Emissions Systems below and start saving instantly.

Popular 2005 Audi A4 Fuel and Emissions Systems Categories

Air- Fuel Ratio Sensors

Fuel Tank Cleaning Kits

Air Flow Meters and Mass Air

Vapor Canister Purge Valves

Fuel Pump Pressure Switches

Fuel Injection Pressure Sensors

MAP-Barometric Pressures

Fuel Pump Control Modules

Smog Pumps

Canister Purge Solenoids

Direct Injection High Pressure Fuel Pumps

Fuel Injectors

Vapor Canisters

Pressure Regulators

Air Charge Temperature Sensors

Ambient Air Temperature Sensors

Fuel Injector O-Ring Kits

Fuel Injector Seal Kits

Vacuum Check Valves

Fuel Injector Gaskets

Secondary Air Injection Relays

EGR Valve Control Switches

Mass Air Flow Sensor Connectors

Fuel Injection Relays

Air Pump Hoses

Exhaust Check Valves

Engine Crankcase Suction Pumps

Vapor Canister Purge Valve Hoses

Fuel Pump Tappets

Fuel Injector O-rings

EGR Valve Gaskets

Fuel Injection Air Flow Meter Boots

Diesel Fuel Line Seal Rings

Crankcase Breather Hoses

Fuel Pump O-Rings

Fuel Injection Pressure Regulator O-Rings

Vacuum Regulator Valves

Auxiliary Air Supplies

Fuel Injection Throttle Control Actuators

Fuel Injection Idle Speed Control Actuators

Air Pump Solenoids

Emission Check Valves

Fuel Injector Seal Tool Set

Essential Fuel and Emissions Systems for 2005 Audi A4s

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$242.86

Brake Vacuum Pump

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$139.87

EGR Vacuum Solenoid

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$73.46

Fuel Pressure Sensor

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$199.99

100% new; Delphi OE Technology Validated to match the vehicle applications; Manufactured to meet or exceed OE requirements

Product Features:

Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
All parts are calibrated and tested to match the OE part
Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube.
Delphi OE technology validated to match the vehicle applications

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$214.99

NTK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. While conventional switching oxygen sensors only switch rich or lean, wideband oxygen (or Air-Fuel Ratio) sensors produce a linear output signal that allows the ECU determine exactly how rich or lean an engine is running and make continuous and precise adjustments of the air-fuel mixture to stay closest to stoichiometric, providing the best possible combustion and fewest emissions. A ceramics company at our core, NTK uses state-of-the art technology enabling complete control of the ceramics used in our wideband oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$191.99

NTK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$12.49

With Victor Reinz gaskets, you can be sure you are getting sealing solutions that deliver OE quality gasket technology and engineering. That is because Victor Reinz is an original equipment supplier and the trusted choice of manufacturers the world over, offering broad coverage for foreign and domestic cars and trucks. In Victor Reinz gasket sets, you get the right combination of components needed for fast, long-lasting repairs.

Product Features:

Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.

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$52.99

Engineered for a perfect fit and plug-and-play installation, this vapor canister purge valve is a direct replacement for the original equipment purge valve. It is critical to the evaporative emissions system and fulfills government requirements.

Product Features:

Direct replacement – this vapor canister purge valve fits and functions like original equipment to ensure proper function of your vehicle’s evaporative emissions system.
Quality construction – manufactured from premium materials for a long service life.
Excellent value – original equipment quality at a lower price
Quality tested – has undergone testing to ensure proper fit and performance

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$2.06

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$24.99

This engine crankcase breather hose is designed to match the fit and function of the original hose on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this engine crankcase breather hose is designed to match the fit and function of the original hose on specified vehicle.
Restores functionality – reliable replacement for an original hose that has failed due to pressure, heat and cracking
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$268.90

Fuel Pump Control Mo

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$16.05

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

Designed to OE standards for ease of installation
High-quality materials withstand extreme conditions
Undergoes extensive testing to ensure reliability
As a global manufacturer of automotive aftermarket products, we maintain complete quality control throughout the manufacturing process

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$46.67

The APA/URO PCV Suction Pump is an ideal high quality aftermarket replacement that is manufactured to meet or exceed OE specifications for fit, form, and function.

Product Features:

Premium aftermarket replacement
Provides performance and dependability
Manufactured to meet OE specifications

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$70.83

Fuel Pressure Sensor

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$62.45

The Vaico Vacuum Non Return Check Valve is a high quality Original Equipment replacement that is manufactured to meet or exceed OE specifications for fit, form, and function.

Product Features:

Made in Germany OE Quality
Premium Original Equipment replacement
Provides performance and dependability
Manufactured to meet OE specifications Q+ The Seal of Excellence
ALWAYS OEM QUALITY
ALWAYS MADE IN GERMANY

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$1.09

Fuel Injector O-Ring

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$7.49

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

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$476.99

This secondary air injection pump is designed to match the fit and function of the original pump on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this secondary air injection pump is designed to match the fit and function of the original pump on specified applications.
Restores functionality – reliable replacement for an original part that is leaking or has failed due to internal component failure.
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$39.85

Air Pump Hose

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$94.99

Carquest premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

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$49.99

The Secondary Air Injection system is an emission control device designed to pump fresh air into the engine exhaust system to reduce harmful emissions and convert the emission into harmless water vapor via a chemical reaction. These systems were used heavily in the pre-catalytic converter emission control period but found some application in vehicles with catalytic converter systems.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.

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$29.99

This mass air flow sensor connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this mass air flow sensor connector matches the appearance and function of the factory hardware on specified applications.
Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$33.78

Vacuum Check Valve

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$11.65

Relay

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$384.99

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$821.99

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$12.99

CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

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$3.38

EGR Adapter Gasket

Upgrade your 2005 Audi A4 with Top-Quality Fuel and Emissions Systems

When it comes to maintaining or upgrading your 2005 Audi A4, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Audi or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your A4 functioning at its best. At Advance Auto Parts, we offer a wide selection of 143 Fuel and Emissions Systems for the 2005 Audi A4, designed to meet your needs without breaking the bank. From Air Flow Sensor replacements to Oxygen Sensors upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Fuel and Emissions Systems for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Fuel and Emissions Systems for your 2005 Audi A4 at great prices. Our Fuel and Emissions Systems inventory for this model ranges from just $1.09 to $821.99, with an average price of $117.96. Our 143 Fuel and Emissions Systems in stock come from 30 trusted brands, so you’re sure to find the right part for your 2005 Audi A4 without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2005 Audi A4, we stock popular OEM and aftermarket Fuel and Emissions Systems from top names like FELPRO Bosch, and more. FELPRO Fuel and Emissions Systems start at just $3.29 and boast an impressive 5 stars average rating from customers. With 1,288 customer reviews and counting, our 2005 Audi A4 Fuel and Emissions Systems have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Fuel and Emissions System upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2005 Audi A4 is always ready to roll. We’re committed to providing you with everything you need to keep your A4 in top shape, all in one place. Start shopping confidently below for your 2005 Audi A4!

Best-Selling Air Flow Sensors for 2005 Audi A4s

Enhance the driving experience in your Audi with 22 quality Air Flow Sensor components, starting at $11.99.

show more show less

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$29.99

Direct replacement – this mass air flow sensor connector matches the appearance and function of the factory hardware on specified applications.
Ideal solution – this connector is a reliable replacement for an original part that is missing or has failed due to fatigue
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$16.79

ACDelco Professional Air Charge Temperature Sensor Connector is a high quality aftermarket replacement component for one or more of the following vehicle systems: ignition, starting and charging, body-electrical and lighting, and/or engine fuel management. This premium aftermarket connector is manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:

Professional, premium aftermarket replacement
Provides the performance and dependability you expect from ACDelco
Manufactured to meet expectations for fit, form, and function

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$11.99

Electrical parts control all aspects of vehicles on the road today. Replacing these components when they are starting to fail will ensure your vehicle has maximum performance and fuel economy. This is why Rein Automotive electrical parts are application specific and match the design and function of the OE parts.

Product Features:

Tested to ensure maximum performance
Manufactured to strict engineering standards/specifications in materials and tolerances
Long life and durability
Made by the OE manufacturer

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$254.82

Air Fuel Ratio Senso

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$240.99

DENSO Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance.; Each component is precision-built for exact replacement+ and a first time fit.; DENSO gives you the right part and the right fit+ the first time.

Product Features:

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

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$234.99

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

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$216.06

Denso First Time Fit oxygen sensors are constructed of the highest quality materials available. High-quality stainless steel, porous polytetrafluoroethylene (PTFE), fluorine rubber, aluminum oxide, high-grade platinum and ceramics are used in each DENSO sensor.

Product Features:

SUPERIOR DESIGN – Maximizes engine performance and fuel efficiency while reducing harmful emissions.
DOUBLE-PROTECTION COVER – Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
ALUMINUM-OXIDE TRAP LAYER – Keeps silicone and lead outside the ceramic element through DENSO’s exclusive design, preventing damage to the platinum electrode.
STAINLESS STEEL HOUSING – Resists corrosion and contamination with a rugged, watertight body.

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$214.99

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$185.99

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

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$171.36

SUPERIOR DESIGN – Maximizes engine performance and fuel efficiency while reducing harmful emissions.
DOUBLE-PROTECTION COVER – Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
ALUMINUM-OXIDE TRAP LAYER – Keeps silicone and lead outside the ceramic element through DENSO’s exclusive design, preventing damage to the platinum electrode.
STAINLESS STEEL HOUSING – Resists corrosion and contamination with a rugged, watertight body.

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$161.99

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$116.76

The Bosch oxygen sensor utilizes a mix of zirconium and yttrium oxides and other elements to form a tough base that withstands the intense stress to which oxygen sensors are subjected. Each element is incredibly strong for best-in-class performance and maximum service life.

Product Features:

OE-Equivalent.
Direct fit for easy installation.
OE Style connectors and wire lengths.
Base ceramic probe of Zirconium and Yttrium.
Patented Platinum Power Grid.

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$106.33

Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet and exceed all original equipment specification and test requirements.

Product Features:

Improved Engine Response and Performance
Lower Emissions
Improved Fuel Economy
Longer Sensor Life
Meets OEM Specifications Installation Notes: Vehicles equipped with Air Fuel Ratio Sensors may look very similar to the Oxygen Sensor. Please confirm the correct part before ordering and if the connector does not match, do not install

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$95.90

OE-Equivalent.
Direct fit for easy installation.
OE Style connectors and wire lengths.
Base ceramic probe of Zirconium and Yttrium.
Patented Platinum Power Grid.
Fine particle filter. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance. Installation Notes: Vehicles equipped with Air Fuel Ratio Sensors may look very similar to the Oxygen Sensor. Please confirm the correct part before ordering and if the connector does not match, do not install.

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$64.99

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$63.99

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$60.99

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$52.65

Air Temp. Sensor

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$37.17

Air Temperature Sensors measure the temperature of the incoming air to the engine. This information is provided to the Engine Control Module (ECU) to determine the correct amount of fuel needed for optimum performance and economy.

Product Features:

Extreme Temperature range: -40F – +260F
Robust Design with High Resistance to Engine Vibrations
OE or Better – Quality, Performance, and Function

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$32.99

Bosch OE quality pressure sensors for accurate measurements with high durability, fast response time and wide measuring range.

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$32.99

The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
Application matched components ensures system operation in like new condition.

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$19.57

Ambient Temp Sensor

Most Popular 2005 Audi A4 Oxygen Sensors

Customize your Audi with 23 Oxygen Sensors products like Oxygen Sensors, all priced under $255.75.

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$106.99

Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:

Advanced Wideband sensing element for exact air/fuel measurement
Robust sensor design increases sensor longevity
Seared protection tube due to 100% functional quality test
True Direct-fit
Pre-coated threads with anti-seize compound right out of the box

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$111.99

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Direct Fit includes OE Connector for easy installation
Performance meets or exceeds OE specifications
True Direct-fit OE connectors and harness

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$149.99

Advanced Wideband sensing element for exact air/fuel measurement
Robust sensor design increases sensor longevity
Seared protection tube due to 100% functional quality test
True Direct-fit
Pre-coated threads with anti-seize compound right out of the box

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$80.99

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Includes Smart Link Connector, no soldering required
No special tools required for installation
Seared protection tube due to 100% functional quality test
Performance meets or exceeds OE specifications

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$131.99

Advanced Wideband sensing element for exact air/fuel measurement
Robust sensor design increases sensor longevity
Seared protection tube due to 100% functional quality test
True Direct-fit
Pre-coated threads with anti-seize compound right out of the box

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$137.99

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Direct Fit includes OE Connector for easy installation
Performance meets or exceeds OE specifications
True Direct-fit OE connectors and harness

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$189.99

DENSO Oxygen Sensors are manufactured and tested to the strictest OE standards for unparalleled performance. Each component is precision built for exact replacement, and a first time fit. This innovative line features DENSO’s exclusive aluminum oxide trap layer, designed to protect the ceramic element from silicone and lead posining for improved engine performance, greater fuel efficiency, and unparalleled longevity. DENSO gives you the right part and the right fit, the first time.

Product Features:

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

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$198.35

OE-Equivalent.
Direct fit for easy installation.
OE Style connectors and wire lengths.
Base ceramic probe of Zirconium and Yttrium.
Patented Platinum Power Grid.

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$144.99

NTK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$48.77

ACERA’s patented Oxygen / Lambda sensor technology is crafted with the highest precision an designed to endure the toughest environment in the vehicles exhaust system. ACERA has over 20 years of experience in research, and developing, Oxygen Sensors and is one of the few manufacturers in the world that actually integrates the Zirconium Oxide ceramic technology directly into the sensor’s core. Starting with the research and development to formulate the YSZ powder, ACERA then integrates the patented Zirconium Oxide (ZrO2) ceramic center core producing a highly durable, long lasting oxygen sensor that provides a much quicker time to operational temperature with minimal variation. To ensure the highest quality and stability, every new oxygen sensor undergoes a pressurized sealing test as well as a multifunction simulated exhaust bench test.

Product Features:

Premium OE Connector
Premium stainless steel body protecting against extreme heat and corrosion
Double layer protection for added durability and long life
Monolithic ceramic element allowing faster operating temperature
Aluma element surface minimizing thermal variation
Aluma protection layer that protects the sensor catalyst from harmful gas
Isolated circuitry that reduces signal noise
Patented Zirconium Oxide (ZrO2) material
100% inspection and testing of product functions on every sensor

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$84.18

The Bosch universal oxygen sensor utilizes a mix of zirconium and yttrium oxides and other elements to form a tough base that withstands the intense stress to which oxygen sensors are subjected. Each element is incredibly strong for best-in-class performance and maximum service life. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:

OE-Equivalent.
Direct fit for easy installation.
OE Style connectors and wire lengths.
Base ceramic probe of Zirconium and Yttrium.
Patented Platinum Power Grid.

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$191.99

NTK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$255.75

Oxygen Sensor

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$242.60

OE-Equivalent.
Direct fit for easy installation.
OE Style connectors and wire lengths.
Base ceramic probe of Zirconium and Yttrium.
Patented Platinum Power Grid.

from

$231.99

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

from

$203.41

DENSO a global supplier to automakers manufactures an OE-equivalent direct fit air fuel ratio sensor that maintains the quality and performance of the Original Equipment it replaces. DENSO continues to innovate with the latest development in air fuel ratio sensors. These components, also known as wide-band oxygen sensors, have a broader response range to provide much finer control of air/fuel mixtures over a greater variety of operating conditions.

Product Features:

Tarnish-proof platinum electrodes provides longer life and maintains accuracy
Quick-response planar zirconia element can quickly detect oxygen concentration
Measures A/F ratios from approximately 12:1 to 19:1
Increased performance by mapping a/f ratios throughout rpm range
Reduces emissions by keeping the air-fuel mixture at an optimum ratio

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$180.49

OE-Equivalent.
Direct fit for easy installation.
OE Style connectors and wire lengths.
Base ceramic probe of Zirconium and Yttrium.
Patented Platinum Power Grid.

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$175.73

SUPERIOR DESIGN – Maximizes engine performance and fuel efficiency while reducing harmful emissions.
DOUBLE-PROTECTION COVER – Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
ALUMINUM-OXIDE TRAP LAYER – Keeps silicone and lead outside the ceramic element through DENSO’s exclusive design, preventing damage to the platinum electrode.
STAINLESS STEEL HOUSING – Resists corrosion and contamination with a rugged, watertight body.

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$135.99

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

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$123.99

Specifically designed to meet the increasing demands of today’s engines
100% checked for high temperature signal output, air tightness, continuity, and heat resistance for optimal efficiency and performance
Coated with aluminum oxide to prevent silicone and lead from contacting the ceramic element and damaging the platinum electrode
Double protection cover helps maintain proper unit temperature for quicker response times, which is critical to your vehicle’s fuel efficiency
Manufactured with a rugged stainless steel housing and porous PTFE filter to resist corrosion and contamination

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$112.99

NTK is the world’s largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle’s on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

OEM QUALITY: NTK is the world’s largest supplier of original equipment oxygen sensors with renowned quality that meets or exceeds OEM specifications
PRODUCT ENGINEERING: Based on OE expertise, but specifically engineered for the aftermarket, NTK Oxygen Sensors offer superior OE fit, form, function
OE TECHNOLOGY: Upgraded to the latest OE technologies, NTK Oxygen Sensors are designed to reduce OE failures, enhance durability and performance
EXTENSIVE TESTING: OE development includes vibration and thermal shock testing. Testing during manufacturing guarantees quality and reliability
EASY INSTALLATION: NTK Oxygen Sensors are equipped with OE specified, water-resistant connectors and harness accessory hardware for easy installation
ADVANCED CERAMIC SENSOR ELEMENT: 3-stage contaminant-resistant plasma jet and deposit trap overcoat protects against element poisoning
NTK ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability

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$98.42

Oxygen Sensor

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$96.45

Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet and exceed all original equipment specification and test requirements.

Product Features:

Improved Engine Response and Performance
Lower Emissions
Improved Fuel Economy
Longer Sensor Life
Meets OEM Specifications Installation Notes: Vehicles equipped with Air Fuel Ratio Sensors may look very similar to the Oxygen Sensor. Please confirm the correct part before ordering and if the connector does not match, do not install

Top Picks for 2005 Audi A4 Gas Caps

Upgrade Audi A4s with top-quality Gas Caps parts, including 3 OEM and aftermarket selections for your 2005 model.

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from

$16.49

Manufactured with OEM quality materials and safety standards by an OE Supplier. Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year.

Product Features:

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$21.99

Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$45.85

APA/URO Fuel Tank Caps are manufactured to meet OE quality, and performance for reliable operation.

Product Features:

Meets OE vehicle standards
Factory type retaining strap for user convenience
OE quality seal ensures fuel tank emissions are maintained preventing check engine warnings.

In-Demand Fuel Pumps for 2005 Audi A4s

Select from 13 premium Fuel Pumps parts for your 2005 Audi A4, with prices ranging from $3.99 to $637.35.

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$459.99

Hitachi’s High Pressure Fuel Pumps (HPPs) are designed to enhance fuel volume delivery for exceptional operation and faster vehicle response. Our HPPs are a good alternative to the standard fuel pump for direct injection, supercharged, and turbocharged applications commonly found in todays vehicles. Pump housing is made of high strength aluminum to ensure durability while keeping weight low. Precision machined surfaces prevent fuel leakage/pressure drop while chemical resistant seals prevent premature wear from ethanol mixed fuels. Designed to meet the exact needs of each specific vehicle, Hitachi’s High Pressure Fuel Pumps are the premium choice. Hitachi is a Tier One OE supplier to the largest automobile manufacturers globally, delivering industry leading quality, and exceeding customer expectations with our products and service. Hitachi is bringing that same knowledge and expertise to the premium products we deliver in the Aftermarket because Quality Matters.

Product Features:

These quality High Pressure Pumps provide exceptional operation with enhanced fuel volume delivery and faster vehicle response. Promotes a rise of fuel pressure from startup; reduces current consumption.
Hitachi is a Tier 1 OE supplier for high pressure fuel pumps
100% NEW, never remanufactured
Meets the OE performance and durability standards for this application
High strength aluminum housing for light weight and durability
Chemical resistant seals prevent premature wear from ethanol mixed fuels
Precision machined surfaces prevent fuel leakage and subsequent pressure drop
O-Ring/Gaskets included when applicable

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$16.79

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$3.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

Meets or exceeds all original equipment specifications
Design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

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$546.99

100 years of OE experience, supplier to the world’s top automakers, OE Heritage and knowledge built into every aftermarket part, comprehensive portfolio for a wide range of vehicles and model years.

Product Features:

Capable of delivering fuel at high pressures that can range from 2,000-2,800 PSI
Mechanically driven high fuel flow pump enables rail pressure build up quickly for fast start times
Fuel delivered directly into the engine combustion chamber for increased horsepower and fuel economy
Meets OE specifications

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$301.99

Delphi is a global OE manufacturer and all fuel pumps are built to Delphi’s OE standards
Empty float height and float retention matches OE specifications and guarantees correct gas gauge reading
Lower amperage draws less load on vehicle’s electrical system
Part is validated, tested and matched to the right vehicle application
Always be sure to check and clean fuel tank to avoid unnecessary returns
Lower failure rates due to its innovative design and durability

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$268.90

Fuel Pump Control Mo

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$41.95

Fuel Pump Tappet

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$504.18

The VDO Electric Fuel Pump Assembly meets or exceeds the OE specifications for fit, durability and performance.

Product Features:

OE-Equivalent electric fuel pump
Direct fit for easy installation
OE connections and fittings
Highly efficient turbine design
Designed for quieter operation

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$637.35

Hitachi Automotive Systems manufactures and markets engine management, electric powertrain, drive control, and car information systems for major automotive original equipment manufacturers worldwide. As a part of the fuel delivery system, the fuel pump is the bloodline of a vehicle, sending a constant supply of pressurized fuel from the tank to the fuel injector. The pump creates positive pressure in the fuel lines, pushing fuel to the engine. Rely on Hitachi OE fuel pumps to disperse fuel accurately and meet optimal horsepower requirements for the modern vehicle!

Product Features:

Constant and pressurized supply of fuel
Accurate fuel dispensing
Fuel flow meets the optimal horsepower requirements of modern vehicles
OE quality and reliability

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$476.99

Delphi is a global OE manufacturer and all fuel pumps are built to Delphi’s OE standards
Empty float height and float retention matches OE specifications and guarantees correct gas gauge reading
Lower amperage draws less load on vehicle’s electrical system
Part is validated, tested and matched to the right vehicle application
Always be sure to check and clean fuel tank to avoid unnecessary returns
Lower failure rates due to its innovative design and durability

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$410.67

The VDO Electric Fuel Pump Assembly meets or exceeds the OE specifications for fit, durability and performance.

Product Features:

OE-Equivalent electric fuel pump
Direct fit for easy installation
OE connections and fittings
Highly efficient turbine design
Designed for quieter operation

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$392.16

DIRECT INJECTION FUE

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$73.46

Fuel Pressure Sensor

Most Sold 2005 Audi A4 Fuel Injectors

Explore our best-selling Audi parts for the 2005 A4 among 44 OEM and aftermarket options starting from $1.09.

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$169.99

Bosch is the actual OE manufacture, plus or minus 5% deviation from OE specification can set a check engine light

Product Features:

OE Technology provides the correct function and calibration to ensure trouble-free operation and emission compliance.
100% new product
Not re-manufactured or rebuilt
Sensor and housing are calibrated and sold together ensuring precise sensor reading and optimal engine performance
Guaranteed to match vehicle requirements for performance, drivability, fuel economy and emissions
Can provide up to 20 percent better fuel consumption

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$161.99

Hitachi’s Air Flow Sensors (MAFs) measure the amount and characteristics of air entering the engine. Hitachi uses precision elements and high-quality components for enhanced durability and accurate air flow measurements. Hitachi MAFs are 100% air flow tested for ideal performance and are calibrated for each application ensuring your vehicle meets the strict emission standards set by the manufacturer. Details such as a contaminant bypass port (when applicable) and protected circuitry providing a durable and reliable product approved by OE manufacturers makes Hitachi’s air flow sensors the premium choice.

Product Features:

Meets the OE performance and durability standards for this application
Welded connections instead of soldered for dependability
Contaminant bypass port provides reliable operation and increases longevity
Contaminant bypass port provides reliable operation and increases longevity
Welded connections instead of soldered for dependability
Meets the OE performance and durability standards for this application

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$7.49

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

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$9.99

The ACDelco Professional Fuel Injector Seal Kit contains high quality aftermarket replacement components for one or more of the following vehicle systems: ignition, and/or engine fuel management. This premium aftermarket kit contains components that are manufactured to meet or exceed your expectations for fit, form, and function.

Product Features:

Professional, premium aftermarket replacement
Provides the performance and dependability you expect from ACDelco
Manufactured to meet expectations for fit, form, and function

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$21.99

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

Designed to OE standards for ease of installation

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$48.49

CARQUEST’S line of remanufactured OEM fuel injectors are remanufactured using a proven 15 step process at a state-of-the-art remanufacturing facility in the U.S.A. Each injector is 100% tested under multiple operating conditions to ensure each injector meets or exceeds OE specifications for flow rate, spray pattern, coil resistance, form, fit and function. Each injector includes new external seals and O-rings.

Product Features:

Each unit is 100% tested to OE specifications
Includes new O-rings and seals made of premium OE quality materials
Includes application specific technical bulletin, where applicable

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$109.99

Advance Auto Parts is proud to carry all new mass air flow sensors that use high-quality components with the highest quality standards.

Product Features:

CARQUEST MAF use all new high-quality components at the highest quality standards.
Manufactured with new and advanced technology to perform, fit and function at OE specifications.
All new product that is tested with OEM equipment to OEM standards
Outperforms competition when tested in extreme environmental conditions

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$142.99

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

Designed to OE standards for ease of installation
Stainless steel calibration slide and spring assembly prevents corrosion within the fuel control body leading to an extended service life
Precision wound and trimmed solenoid windings allow the computer to command efficient delivery of fuel
High-temp Viton O-rings enable prolonged sealing of injector under extreme heat conditions
Fiber optic yttrium aluminum garnet “YAG” laser welding and 100 million cycle testing ensure quality in every box
With industry leading expertise, when original equipment fails our products are designed to fix the inherent failure issues
BWD is a global manufacturer of original equipment and aftermarket fuel injection products, complete quality control is maintained through the manufacturing process from componentry to finished product

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$8.99

High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.

Product Features:

Designed to OE standards for ease of installation
High-quality materials withstand extreme conditions
Undergoes extensive testing to ensure reliability
As a global manufacturer of automotive aftermarket products, we maintain complete quality control throughout the manufacturing process

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$3.29

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

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$111.99

Product Features:

Each unit is 100% tested to OE specifications
Includes new o-rings and seals made of premium OE quality materials
Includes application specific technical bulletin, where applicable

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$165.99

Hitachis Air Flow Sensors (MAFs) measure the amount and characteristics of air entering the engine. Hitachi uses precision elements and high-quality components for enhanced durability and accurate air flow measurements. Hitachi MAFs are 100% air flow tested for ideal performance and are calibrated for each application ensuring your vehicle meets the strict emission standards set by the manufacturer. Details such as a contaminant bypass port (when applicable) and protected circuitry providing a durable and reliable product approved by OE manufacturers makes Hitachis air flow sensors the premium choice.

Product Features:

Hitachi is a Tier 1 OE supplier for air flow sensors
100% NEW, never remanufactured
Hitachi’s advanced precision elements and high quality components provide enhanced durability. We feature exact fitment and calibration for each vehicle, which assists engine efficiency and fuel mileage. Our sensors are 100% air flow tested to meet exac
Precision manufactured and assembled sensing elements for accurate air flow measurements

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$138.99

Advance Auto Parts is proud to carry all new mass air flow sensors that use high-quality components with the highest quality standards.

Product Features:

CARQUEST MAF use all new high-quality components at the highest quality standards.
Manufactured with new and advanced technology to perform, fit and function at OE specifications.
All new product that is tested with OEM equipment to OEM standards
Outperforms competition when tested in extreme environmental conditions

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$146.99

Advance Auto Parts is proud to carry all new mass air flow sensors that use high-quality components with the highest quality standards.

Product Features:

CARQUEST MAF use all new high-quality components at the highest quality standards.
Manufactured with new and advanced technology to perform, fit and function at OE specifications.
All new product that is tested with OEM equipment to OEM standards
Outperforms competition when tested in extreme environmental conditions

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$91.99

Advance Auto Parts is proud to carry all new mass air flow sensors that use high-quality components with the highest quality standards.

Product Features:

CARQUEST MAF use all new high-quality components at the highest quality standards.
Manufactured with new and advanced technology to perform, fit and function at OE specifications.
All new product that is tested with OEM equipment to OEM standards
Outperforms competition when tested in extreme environmental conditions

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$7.79

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

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$199.99

100% new; Delphi OE Technology Validated to match the vehicle applications; Manufactured to meet or exceed OE requirements

Product Features:

Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
All parts are calibrated and tested to match the OE part
Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube.
Delphi OE technology validated to match the vehicle applications

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$24.09

Fuel Injector O-Ring

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$338.71

Hitachi manufactures a direct fit Air Mass Meter that guarantees OEM quality, fit and performance.

Product Features:

OEM Quality Direct fit Application
Platinum coated sensing element
Meets or exceeds OEM specifications
Utilizes the factory style mounts, connectors and fittings
Provides exceptional reliability

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$332.30

Hitachi manufactures a direct fit Air Mass Meter that guarantees OEM quality, fit and performance.

Product Features:

OEM Quality Direct fit Application
Platinum coated sensing element
Meets or exceeds OEM specifications
Utilizes the factory style mounts, connectors and fittings
Provides exceptional reliability

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$258.00

Intake Manifold Actuator

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$223.99

100% new; Delphi OE Technology Validated to match the vehicle applications; Manufactured to meet or exceed OE requirements.

Product Features:

Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
All parts are calibrated and tested to match the OE part
Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube.
Delphi OE technology validated to match the vehicle applications

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$193.99

100% new; Delphi OE Technology Validated to match the vehicle applications; Manufactured to meet or exceed OE requirements.

Product Features:

Delphi mass air flow sensors are the global benchmark for accuracy and signal noise
Delphi mass air flow sensors feature high quality sensing elements for outstanding performance over a wide range of ambient temperatures
Delphi is a manufacturer of OE mass air flow sensors since their first use over 30 years ago
All parts are calibrated and tested to match the OE part
Probe solution offered wherever possible to reduce repair time by eliminating the need to replace the flow tube.
Delphi OE technology validated to match the vehicle applications

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$191.97

Air Mass Sensor

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$187.05

AIR MASS SENSOR

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$175.99

Bosch is a recognized OE leader in fuel systems technology, with more than 45 years of gasoline fuel injection experience. The fuel injection program provides vast coverage for Domestic, European, and Asian vehicles.

Product Features:

Guaranteed OE fit, form and function
Manufactured of the highest quality materials
Provides precision flow and original spray pattern for optimal performance
Product includes top and bottom mounting o-ring
Maintains new-car smoothness and drivability

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$172.99

100 years of OE experience, supplier to the world’s top automakers, OE Heritage and knowledge built into every aftermarket part.

Product Features:

Precisely manufactured internal valves, diaphragms and springs means excellent performance under all engine operating conditions
Quiet operation, no audible regulator noise
Robust diaphragm materials means longer life, improved durability and compatibility with a wide range of fuels
Consistent and predictable fuel pressure throughout system range of control provides great drivability

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$155.20

Pierburg manufactures a direct fit Air Mass Meter that guarantees OEM quality, fit and performance.

Product Features:

OEM Quality Direct fit Application
Platinum coated sensing element
Meets or exceeds OEM specifications
Utilizes the factory style mounts, connectors and fittings
Provides exceptional reliability

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$148.61

Port Fuel Injection (PFI) is the world’s most widely used system for internal combustion engines and offers many advantages for engines with a low pressure output.

Product Features:

Low-pressure systems are less complex and more affordable than high-pressure systems
Robust combustion process tolerates lower-quality fuel
Maintenance-friendly design reduces the overhead for system diagnostics

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$119.99

GDI SEAL TOOL KIT

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$117.69

Air Mass Meter Boot

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$62.45

The Vaico Vacuum Non Return Check Valve is a high quality Original Equipment replacement that is manufactured to meet or exceed OE specifications for fit, form, and function.

Product Features:

Made in Germany OE Quality
Premium Original Equipment replacement
Provides performance and dependability
Manufactured to meet OE specifications Q+ The Seal of Excellence
ALWAYS OEM QUALITY
ALWAYS MADE IN GERMANY

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$58.99

WVE is a leading source of advanced vehicle electronics components for replacement applications in the automotive aftermarket and original equipment applications. WVE offers high-technology manufacturing along with innovative solutions and improvements to

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$53.99

Each unit is 100% tested to OE specifications
Includes new O-rings and seals made of premium OE quality materials
Includes application specific technical bulletin, where applicable

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$31.14

Vacuum Valve

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$14.36

FI Throttle Body Mou

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$12.49

Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.

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$10.99

Bosch is one of the largest global suppliers of automotive products, developing, manufacturing and supplying precision OE components and systems to vehicle manufacturers and the automotive aftermarket. This 5-piece kit contains 3 O-rings (black), 1 support ring (gray), and 1 protective cap (yellow). Use one kit per injector.

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$8.79

Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.

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$8.46

Throttle Body Gasket

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$6.29

Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.

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$3.29

Professional, premium aftermarket replacement
Provides the performance and dependability you expect from ACDelco
Manufactured to meet expectations for fit, form, and function

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$2.06

from

$1.09

Fuel Injector O-Ring

Top-Rated Fuel and Emissions Systems Brands For Your 2005 Audi A4

Shop for the best-rated brands offering Fuel and Emissions Systems and other products for your 2005 Audi A4s. Below you’ll find some of our best rated Fuel and Emissions Systems from FELPRO and Bosch, and more. Fuel and Emissions Systems from these brands that fit a 2005 A4 start at just $2.06 and are rated as high as 5 stars. OEM and aftermarket Fuel and Emissions Systems don’t get more top quality, durable, and affordable than from the brands below.

Popular FELPRO 2005 Audi A4 Fuel and Emissions Systems

When it comes to maintaining or upgrading your 2005 Audi A4, using quality Fuel and Emissions Systems is essential to ensure durability and a perfect fit. FELPRO ticks all of those boxes. We offer a wide selection of FELPRO Fuel and Emissions Systems, specifically designed for the 2005 Audi A4. With over 4 FELPRO brand Fuel and Emissions Systems in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $3.29, with an average price of just $5.64. Plus, with over 109 customer reviews and an average rating of 5 stars, you can trust that our FELPRO Fuel and Emissions Systems will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

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$3.99

This product is not rated

O-RING

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$7.79

This product is not rated

Fuel Injection Throttle Body Mounting Gasket

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$3.29

This product is not rated

Fuel Injection Throttle Body Mounting Gasket

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Popular Bosch 2005 Audi A4 Fuel and Emissions Systems

Bosch auto parts is one of the highest quality Fuel and Emissions System brands in the market. Any 2005 Audi A4 owner should feel confident when installing genuine Bosch parts in their vehicle. To ensure the best fit and performance for your 2005 A4, Advance Auto Parts carries a full inventory of 23 Bosch Fuel and Emissions Systems. Plus you will be keeping your Audi in peak condition while saving money because prices on these Bosch Fuel and Emissions Systems range from $2.06 to $242.60, plus, with more than 159 customer reviews and an impressive 5 stars average rating, you can be confident the Fram Fuel and Emissions Systems below will deliver on both quality and value.

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$198.35

This product is not rated

Bosch, Oxygen Sensor, Before Cat

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$137.99

This product is not rated

Oxygen Sensor: 4 Wire, 50.2" Long, Heated, Exact Fit

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$131.99

This product is not rated

Wideband Oxygen Sensor: 5 Wire, 28.74" Long, Heated, Exact Fit

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FAQs for 2005 Audi A4 Fuel and Emissions Systems

Which Fuel and Emissions Systems are best-sellers for 2005 Audi A4s?

Out of 143 Fuel and Emissions Systems that fit 2005 Audi A4s, the following parts are the top sellers:

Fuel Injector O-Ring Kit (3504360) – $7.49
Fuel Tank Cleaning Kit (11692237) – $12.49
Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with 8 O-Rings (11906669) – $9.99

What’s the price range for 2005 Audi A4 Fuel and Emissions Systems?

Fuel and Emissions System prices for the 2005 Audi A4 start at $1.09 and go up to $821.99 for the most premium parts.

What’s the average price of a Fuel and Emissions System for a 2005 Audi A4?

The average price for Fuel and Emissions Systems for the 2005 Audi A4 is $117.96. Keep in mind the variety of part types within our Fuel and Emissions System category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Fuel and Emissions Systems for other Audi A4 model years?

Yes, we currently carry Fuel and Emissions Systems for 24 model years of Audi A4s between 1996 and 2020. Fuel and Emissions Systems are bought most frequently for the following model years: 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, and 2012.

What are the cheapest Fuel and Emissions Systems for my 2005 Audi A4?

The cheapest 2005 Audi A4 Fuel and Emissions Systems we carry in stock are:

Fuel Injector O-Ring (12053420) – $1.09
Fuel Injector Seal (10740455) – $2.06
Fuel Injector Seal (11474383) – $2.51
Fuel Injection Throttle Body Mounting Gasket (20780372) – $3.29
Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with 2 O-Rings (11906761) – $3.29

What types of Fuel and Emissions Systems do you sell for my 2005 Audi A4?

As of 2/5/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 2005 Audi A4:

Can I get help with 2005 Audi A4 Fuel and Emissions System orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Audi Fuel and Emissions Systems and more.

What is your return policy for Audi A4 Fuel and Emissions Systems?

Advance Auto Parts keeps returns simple. For new Audi A4 Fuel and Emissions Systems and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2005 Audi A4 Fuel and Emissions Systems

Pierburg – Brake Vacuum Pump (Part No.N4050446713APG)

Pierburg – EGR Vacuum Solenoid (Part No.B7008274290APG)

Original Equipment – Fuel Pressure Sensor (Part No.C3001401146OEA)

Delphi – Mass Air Flow Sensor (Part No.AF10157)

NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 52.3" Long, Heated, Direct Fit (Part No.24342)

NTK – Switching Oxygen Sensor: 4 Wire, 31.5" Long, Heated, Direct Fit (Part No.25656)

Victor Reinz – Fuel Injection Throttle Body Mounting Gasket (Part No.71-16550-00)

Dorman – Evaporative Emissions Purge Solenoid Valve (Part No.911-800)

Bosch – Fuel Injector Seal (Part No.C101016838BOS)

Dorman – Help – Breather Hose (Part No.48005)

Original Equipment – Fuel Pump Control Mo (Part No.E3006568274OEA)

Carquest – Fuel Injector Seal Kit (Part No.274831)

APA/URO Parts – Suction Pump (Part No.B2045325720APA)

Autopart International Inc – Fuel Pressure Sensor (Part No.C30012068614API)

Vaico – Q+ OE Quality Vacuum Non Return Check Valve (Part No.B2024299234VCO)

Elring – Fuel Injector O-Ring (Part No.C101262400ELR)

Felpro – Fuel Injector O-Ring Kit (Part No.ES 70599)

Dorman – Secondary Air Injection Pump (Part No.306-031)

MTC – Air Pump Hose (Part No.B6030268074MTC)

Carquest Premium – Vapor Canister Purge Solenoid (Part No.CPA2392)

Carquest Premium – Secondary Air Injection Pump Check Valve (Part No.EGA1181)

Dorman – Mass Air Flow Sensor Connector (Part No.645-924)

Kayser – Vacuum Check Valve (Part No.O404032232KAY)

Bosch – Relay (Part No.P202095447BOS)

Carquest Premium – Vapor Canister (Part No.CPN2329)

Carquest Premium – Vapor Canister (Part No.CPN1736)

Carquest Premium – Exhaust Gas Recirculation (EGR) Valve Gasket (Part No.EVA1107)

Elring – EGR Adapter Gasket (Part No.B7102387165ELR)

Dorman – Mass Air Flow Sensor Connector (Part No.645-924)

ACDelco – Multi-Purpose Wire Connector with Leads (Part No.PT2164)

Rein – Thermo Switch (Part No.ELT0059)

DENSO – Air Fuel Ratio Senso (Part No.C5015835010ND)

DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 52.17" Long, Heated, Exact Fit (Part No.234-5102)

DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 28.74" Long, Heated, Exact Fit (Part No.234-5028)

DENSO – First Time Fit Oxygen Sensor (Part No.C5010374927ND)

NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 52.3" Long, Heated, Direct Fit (Part No.24342)

DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 58.66" Long, Heated, Exact Fit (Part No.234-5115)

DENSO – First Time Fit Oxygen Sensor (Part No.C5010690491ND)

NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 59" Long, Heated, Direct Fit (Part No.24318)

Bosch – Bosch Oxygen Sensor (Part No.C5010389596BOS)

Walker – Walker Oxygen Sensor (Part No.C5010380243WKR)

Bosch – Bosch Oxygen Sensor (Part No.C5010398331BOS)

Carquest Premium – Air Charge Temperature Sensor (Part No.WTA1398)

Carquest Premium – Air Charge Temperature Sensor (Part No.WTA1883)

Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA2018)

Vemo – Air Temp. Sensor (Part No.C60002930617VMO)

Bosch – Air Temperature Sensors (Part No.C600084793BOS)

Bosch – Pressure Sensor (Part No.0261230266)

Carquest Premium – Ambient Air Temperature Sensor (Part No.WTA1106)

Rein – Ambient Temp Sensor (Part No.P4025342395RIN)

Bosch – Wideband Oxygen Sensor: 5 Wire, 58.86" Long, Heated, Exact Fit (Part No.17351)

Bosch – Oxygen Sensor: 4 Wire, 68.7" Long, Heated, Exact Fit (Part No.16978)

Bosch – Wideband Oxygen Sensor: 5 Wire, 47.44" Long, Heated, Exact Fit (Part No.17480)

Bosch – Oxygen Sensor: 4 Wire, 24.92" Long, Heated, Universal (Part No.15733)

Bosch – Wideband Oxygen Sensor: 5 Wire, 28.74" Long, Heated, Exact Fit (Part No.17353)

Bosch – Oxygen Sensor: 4 Wire, 50.2" Long, Heated, Exact Fit (Part No.16986)

DENSO – Oxygen Sensor: Downstream, 4 Wire, 28.74" Long, Heated, Exact Fit (Part No.234-4808)

Bosch – Bosch, Oxygen Sensor, Before Cat (Part No.C5010381649BOS)

NTK – Switching Oxygen Sensor: 4 Wire, 27.5" Long, Heated, Direct Fit (Part No.25604)

ACERA – ACERA Oxygen Sensor (Part No.C5010566952ACR)

Bosch – Universal Oxygen Sensor (Part No.C5010126014BOS)

NTK – Switching Oxygen Sensor: 4 Wire, 31.5" Long, Heated, Direct Fit (Part No.25656)

DENSO – Oxygen Sensor (Part No.C5010374961ND)

Bosch – Bosch Oxygen Sensor (Part No.C5010403494BOS)

DENSO – Oxygen Sensor: 4 Wire, 50.28" Long, Heated, Exact Fit (Part No.234-4829)

DENSO – First Time Fit Air Fuel Ratio Sensor (Part No.C5015689987ND)

Bosch – Oxygen Sensor (Part No.C5010417731BOS)

DENSO – Oxygen Sensor (Part No.C5010835004ND)

DENSO – Oxygen Sensor: 4 Wire, 69.21" Long, Heated, Exact Fit (Part No.234-4874)

DENSO – Oxygen Sensor: Downstream, 4 Wire, 67.32" Long, Heated, Exact Fit (Part No.234-4809)

NTK – Switching Oxygen Sensor: 4 Wire, 37" Long, Heated, Direct Fit (Part No.25605)

Bosch – Oxygen Sensor (Part No.C50103313366BOS)

Walker – Walker Oxygen Sensor (Part No.C5010382606WKR)

Carquest Premium – Fuel Cap: 10827, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10827)

Carquest Premium – Locking Fuel Cap (Part No.10597)

APA/URO Parts – Fuel Tank (Gas) Cap (Part No.E2010405983APA)

Hitachi – High Pressure Fuel Pump – New Actual OE Part (Part No.HPP0004)

Carquest Premium – Multi Purpose Relay (Part No.RAA1792)

Felpro – O-RING (Part No.71857)