2018 Audi A4 Fuel and Emissions Systems
Find Your Specific 2018 Audi A4 Fuel and Emissions Systems
Below you will find various in-demand Audi Fuel and Emissions Systems, components and accessories for your 2018 A4. Advance Auto Parts has popular A4 parts like Air Flow Sensors, Oxygen Sensors, Fuel Pumps and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other A4 model years including
2011,
2012,
2013,
2014,
2015,
2016,
2017,
2019,
2020 and more. Select a category of 2018 Audi A4 Fuel and Emissions Systems below and start saving instantly.
Popular 2018 Audi A4 Fuel and Emissions Systems Categories
Essential Fuel and Emissions Systems for 2018 Audi A4s
Bosch – Pressure Sensor (Part No.0261230266)
from
$33.99
Bosch OE quality pressure sensors for accurate measurements with high durability, fast response time and wide measuring range
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Product Features:
- Bosch OE quality pressure sensors for accurate measurements
- Bosch OE quality pressure sensors for long term stability
- Bosch OE quality pressure sensors with a short response time
- Bosch OE quality pressure sensors with improved media resistance
Carquest Premium – Manifold Absolute Pressure Sensor (Part No.ECA1414)
from
$111.99
Pressure sensors are used within several operating systems on the vehicle. Subjects in this category measure the pressure of both liquid and air to include air in a positive pressure and negative pressure range. Pressure sensors report out as the result of an electrical device called a strain gauge which produces an analog or digital signal output dependent on the needs of the circuit. Pressures may be very low such as barometric pressure, or extremely high such as in a high-pressure fuel injection system.
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Product Features:
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
- Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
- Robust circuit board design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
- Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
- 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.
Hitachi – Direct Injection High Pressure Fuel Pump (Part No.HPP0010)
from
$369.99
Hitachi’s High Pressure Fuel Pumps (HPPs) are designed to enhance fuel volume delivery for exceptional operation and faster vehicle response.
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Product Features:
- Hitachi is a Tier 1 OE supplier for Direct Injection High Pressure Fuel Pump
- Hitachi is a Tier 1 OE supplier for Direct Injection High Pressure Fuel Pump
- 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
Delphi – Direct Injection High Pressure Fuel Pump: Without Gasket/Seal or Wiring Harness (Part No.HM10012)
from
$480.99
Demand for Gasoline Direct injection (GDi) technology globally is expected to grow in excess of 10 percent annually through 2026. Delphi uses the latest generation of OE technology for our GDi, and our GDi service program includes the OE parts, tools and know-how to service this fast-growing, high-performance technology. Delphi is a leading Tier 1 supplier of GDi systems to global OEMs. We offer multiple GDi specific training classes, a technician support hotline staffed by ASE certified technicians, and a full line of GDi high-pressure fuel pumps. Learn more about our training programs and tech hotline at 1-877-463-3574.
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Product Features:
- Capable of delivering fuel at high pressures that can range from 2,000 to 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
Carquest Premium – Fuel Injector Seal Kit (Part No.AS017)
from
$3.99
CARQUEST fuel injector seal kits include the necessary O-rings and seals to properly reseal the injector, which is a recommended practice any time the injector is removed. Includes hard to find or previously dealer-only components.
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Product Features:
- Premium OE quality materials
- Services one injector
Carquest Premium – Fuel Injector Seal Kit (Part No.AS070)
from
$17.99
CARQUEST fuel injector seal kits include the necessary O-rings and seals to properly reseal the injector, which is a recommended practice any time the injector is removed. Includes hard to find or previously dealer-only components. Use CARQUEST tool kit ATK-001 or equivalent for proper installation of combustion seal.
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Product Features:
- Premium OE quality materials.
- Services one injector.
Delphi – Electric Fuel Pump & Strainer Set: 12V, 2 Male Blade Terminals, Ext. Strainer (Part No.FE0724)
from
$356.99
Delphi is a Tier 1 supplier to the majority of global vehicle manufacturers and has been a manufacturer of dependable fuel pumps and fuel delivery parts for over 80 years. With over 30 OE-proprietary innovations and 150 patents in fuel technologies, Delphi is regarded as a market leader in North American fuel management with sales coverage at over 95%. Learn more about our expert-led training programs and tech hotline at 1-877-463-3574. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.
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Product Features:
- Delphi is a global OE manufacturer and all fuel pumps are built to Delphi’s OE standards
- Delphi pumps are designed to operate under extreme temperatures with quick engine starts
- Improved pump performance as a result of Delphi’s innovative design and durability
- Restores fast pressure performance and system integrity, translating to better pumping through less energy
- Part is validated, tested and matched to the right vehicle application
- Lower amperage draws less load on vehicle’s electrical system
- Always be sure to check and clean fuel tank to avoid unnecessary returns
- Always replace the fuel strainer when doing a fuel pump repair
Delphi – Fuel Pump Module Assembly: With Float Arm (Part No.FG1634)
from
$837.99
Delphi is a Tier 1 supplier to the majority of global vehicle manufacturers and has been a manufacturer of dependable fuel pumps and fuel delivery parts for over 80 years. With over 30 OE-proprietary innovations and 150 patents in fuel technologies, Delphi is regarded as a market leader in North American fuel management with sales coverage at over 95%. Learn more about our expert-led training programs and tech hotline at 1-877-463-3574. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.
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Product Features:
- 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
Bosch – Wideband Oxygen Sensor: 5 Wire, 28.74" Long, Heated, Exact Fit (Part No.17178)
from
$226.99
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.
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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
Bosch – Oxygen Sensor: 4 Wire, 53.35" Long, Heated, Exact Fit (Part No.15160)
from
$86.99
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.
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Product Features:
- 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
Delphi – Fuel Tank Cleaning Kit (Part No.FC01)
from
$12.49
When replacing a fuel pump or module, it’s extremely important to clean the tank. Existing dirt, debris, and contamination stuck in the fuel tank can clog the brand-new strainer. Delphi’s Fuel Tank Cleaning Kit (FC01) and Tool (FC02) can help clean your fuel tank in less than five minutes. The FC01 includes a low-suds solution, cloth, and gloves that works together with the FC02 to help clean those hard to reach places without having to remove the fuel tank. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.
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Product Features:
- Helps avoid premature fuel pump failure
- Lint free towel included
- Low suds formulation
- Removes harmful contaminants from the fuel tank
Bosch – Fuel Injector: New (Part No.62674)
from
$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.
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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
Carquest Premium – Remanufactured Multi Port Fuel Injector (Part No.A212-1885)
from
$65.99
The CARQUEST line of remanufactured OEM fuel injectors are remanufactured using a proven 15 step process at a state-of-the-art remanufacturing facility in the USA Injectors are thoroughly 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.
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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
Bosch – Mass Air Flow (MAF) Sensor (Part No.0280218063)
from
$169.99
Bosch is the actual OE manufacture, plus or minus 5% deviation from OE specification can set a check engine light
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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
Carquest Premium – New Mass Air Flow Sensor – Complete Assembly (Part No.MQ7281)
from
$91.99
Carquest Premium mass air flow (MAF) sensors are built to meet the original equipment (OE) specifications for each application. Our MAF sensors are built by a manufacturer that meets IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Carquest Premium mass air flow sensors are 100% new and undergo extensive validation testing to ensure long-lasting performance and reliability.
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Product Features:
- Designed to meet OE specifications for fit, form and function
- 100% new unit with no core charge
- Advanced micro-controlled technology delivers more accurate output in extreme temperatures
- Extensive validation testing to ensure precision output for better performance and reliability
- O-rings or gaskets included where applicable
Hitachi – Mass Air Flow Sensor (Part No.MAF0010)
from
$165.99
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.
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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
- Meets the OE performance and durability standards for this application
- Welded connections instead of soldered for dependability
Carquest Premium – Manifold Absolute Pressure Sensor (MAP) (Part No.ECA1627)
from
$142.99
CARQUEST MAP sensors are manufactured with critical OEM components to ensure that your engine runs efficiently to reach the best gas mileage on your vehicle.
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Product Features:
- CARQUEST MAP sensors connectors are exact OE fit to ensure the proper vacuum is maintained to prevent power loss and to minimize internal contamination.
- CARQUEST MAP sensors utilize high temperature resistant seals. Damaged seals can directly impact the vehicles fuel-to-air ratio, making it less fuel efficient.
- CARQUEST MAP sensors are 100% individually tested for all product functionalities including proper vacuum seal and electrical output.
Carquest Premium – New Map Sensor (Part No.ECA2483)
from
$218.99
CARQUEST MAP sensors are manufactured with critical OEM components to ensure that your engine runs efficiently to reach the best gas mileage on your vehicle.
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Product Features:
- CARQUEST MAP sensors connectors are exact OE fit to ensure the proper vacuum is maintained to prevent power loss and to minimize internal contamination.
- CARQUEST MAP sensors utilize high temperature resistant seals. Damaged seals can directly impact the vehicles fuel-to-air ratio, making it less fuel efficient.
- CARQUEST MAP sensors are 100% individually tested for all product functionalities including proper vacuum seal and electrical output.
Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10835)
from
$12.99
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.
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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
Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10844)
from
$40.99
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.
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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
- Independently tested for emission control
Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17597)
from
$15.99
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- Protects your fuel from theft and vandalism
- Manufactured from durable, long-life materials
- Manufactured from durable, long-life materials
- Independently tested for emission control
- Passes all state and federal emissions tests
- Reduces air pollution with proper sealing and venting
Carquest Premium – Premium GDI Seal Tool Kit (Part No.ATK-001)
from
$129.99
This premium tool kit is designed to ensure the correct installation of the combustion seal on Gasoline Direct Injectors (GDI), which require replacement any time the injector is reinstalled. This special tool allows for the expansion of the combustion seal to allow installation onto the injector’s tip and resizing tools to provide precise dimensioning to ensure proper combustion sealing. Constructed of high-quality stainless steel the tool will provide years of trouble-free service and can be used on over 100 unique styles of GDI injectors.
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Product Features:
- Includes two expansion cones
- Includes two resizing tools
- Includes one seal installation collet
- Includes hard case
- Includes instruction manual
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 14.75" Long, Heated, Direct Fit (Part No.24342)
from
$236.99
NGK is the sensor specialist for import and domestic applications. Established under the NGK product family, oxygen sensors are part of our ongoing commitment to streamlining product types and increasing coverage. A ceramic company at our core, uses cutting-edge technology to control the ceramic used in our oxygen sensors from raw material to finished product. is the world’s largest supplier and manufacturer of OE oxygen sensors. Combining expertise and innovation, oxygen sensors deliver superior fit, form, and function. oxygen sensors undergo extensive testing during manufacturing to ensure quality and reliability that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for comprehensive market support and OE application technology.
Product Features:
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Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 20.75" Long, Heated, Direct Fit (Part No.24308)
from
$196.99
NGK 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, 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:
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Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 22.56" Long, Heated, Exact Fit (Part No.234-5120)
from
$261.99
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.
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Product Features:
- Specifically designed to meet the increasing demands of today’s engines
- 100 percent 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
DENSO – Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 14.96" (Part No.234-5736)
from
$188.99
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.
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NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 29.5" Long, Heated, Direct Fit (Part No.24328)
from
$219.99
NGK is the sensor specialist for import and domestic applications. Established under the NGK product family, oxygen sensors are part of our ongoing commitment to streamlining product types and increasing coverage. A ceramic company at our core, uses cutting-edge technology to control the ceramic used in our oxygen sensors from raw material to finished product. is the world’s largest supplier and manufacturer of OE oxygen sensors. Combining expertise and innovation, oxygen sensors deliver superior fit, form, and function. oxygen sensors undergo extensive testing during manufacturing to ensure quality and reliability that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for comprehensive market support and OE application technology.
Product Features:
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Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 5 Wire, 15.8" Long, Heated, Direct Fit (Part No.24318)
from
$163.99
NGK 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, 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:
See More
Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
Upgrade your 2018 Audi A4 with Top-Quality Fuel and Emissions Systems
When it comes to maintaining or upgrading your 2018 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 17 Fuel and Emissions Systems for the 2018 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 2018 Audi A4 at great prices.
Our Fuel and Emissions Systems inventory for this model
ranges from just $12.49 to $459.99, with
an average price of $182.15.
Our 17 Fuel and Emissions Systems in stock come from 6 trusted brands, so you’re sure to find the right part for your 2018 Audi A4 without overspending.
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 2018 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 2018 Audi A4!
Best-Selling Air Flow Sensors for 2018 Audi A4s
Enhance the driving experience in your Audi with 5 quality Air Flow Sensor components, starting at $111.99.
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 18.8" Long, Heated, Direct Fit (Part No.27050)
from
$153.99
NGK is the sensor specialist for import and domestic applications. Established under the NGK product family, oxygen sensors are part of our ongoing commitment to streamlining product types and increasing coverage. A ceramic company at our core, uses cutting-edge technology to control the ceramic used in our oxygen sensors from raw material to finished product. is the world’s largest supplier and manufacturer of OE oxygen sensors. Combining expertise and innovation, oxygen sensors deliver superior fit, form, and function. oxygen sensors undergo extensive testing during manufacturing to ensure quality and reliability that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for comprehensive market support and OE application technology.
Product Features:
See More
Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
Carquest Premium – New Map Sensor (Part No.ECA2483)
from
$218.99
CARQUEST MAP sensors are manufactured with critical OEM components to ensure that your engine runs efficiently to reach the best gas mileage on your vehicle.
Product Features:
See More
Product Features:
- CARQUEST MAP sensors connectors are exact OE fit to ensure the proper vacuum is maintained to prevent power loss and to minimize internal contamination.
- CARQUEST MAP sensors utilize high temperature resistant seals. Damaged seals can directly impact the vehicles fuel-to-air ratio, making it less fuel efficient.
- CARQUEST MAP sensors are 100% individually tested for all product functionalities including proper vacuum seal and electrical output.
DENSO – Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 14.96" (Part No.234-5736)
from
$188.99
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.
See More
NTK – Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 11" Long, Heated, Direct Fit (Part No.27052)
from
$172.99
NGK 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, 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:
See More
Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
Carquest Premium – Manifold Absolute Pressure Sensor (Part No.ECA1414)
from
$111.99
Pressure sensors are used within several operating systems on the vehicle. Subjects in this category measure the pressure of both liquid and air to include air in a positive pressure and negative pressure range. Pressure sensors report out as the result of an electrical device called a strain gauge which produces an analog or digital signal output dependent on the needs of the circuit. Pressures may be very low such as barometric pressure, or extremely high such as in a high-pressure fuel injection system.
Product Features:
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Product Features:
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
- Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
- Robust circuit board design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
- Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
- 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.
Most Popular 2018 Audi A4 Oxygen Sensors
Customize your Audi with 3 Oxygen Sensors products
like Oxygen Sensors, all
priced under $168.99.
DENSO – Oxygen Sensor: 4 Wire, Direct Fit, Heated, Wire Length: 20.47" (Part No.234-8062)
from
$168.99
DENSO Oxygen 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; 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.
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Bosch – OXYGEN SENSOR (Part No.17100)
from
$164.99
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:
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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 OE connectors and harness
- Recommend to use OTC 6500 Flexihead O2 Sensor Wrench
NTK – Switching Oxygen Sensor: 4 Wire, 17.75" Long, Heated, Direct Fit (Part No.25764)
from
$148.99
NGK 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, 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:
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Product Features:
- OEM QUALITY: 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, Oxygen Sensors offer superior OE fit, form, function
- OE TECHNOLOGY: Upgraded to the latest OE technologies, 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: 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
- ADVANTAGE: Superior dual-coated platinum interface and thinner ceramic element produces fastest light off and response times with best durability
Top Picks for 2018 Audi A4 Fuel Pumps
Upgrade Audi A4s with top-quality Fuel Pumps parts, including 3 OEM and aftermarket selections for your 2018 model.
Delphi – Direct Injection High Pressure Fuel Pump: Without Gasket/Seal or Wiring Harness (Part No.HM10049)
from
$405.99
Demand for Gasoline Direct injection (GDi) technology globally is expected to grow in excess of 10 percent annually through 2026. Delphi uses the latest generation of OE technology for our GDi, and our GDi service program includes the OE parts, tools and know-how to service this fast-growing, high-performance technology. Delphi is a leading Tier 1 supplier of GDi systems to global OEMs. We offer multiple GDi specific training classes, a technician support hotline staffed by ASE certified technicians, and a full line of GDi high-pressure fuel pumps. Learn more about our training programs and tech hotline at 1-877-463-3574.
Product Features:
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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
Delphi – Fuel Pump Module Assembly (Part No.FG2093)
from
$459.99
Delphi is a Tier 1 supplier to the majority of global vehicle manufacturers and has been a manufacturer of dependable fuel pumps and fuel delivery parts for over 80 years. With over 30 OE-proprietary innovations and 150 patents in fuel technologies, Delphi is regarded as a market leader in North American fuel management with sales coverage at over 95%. Learn more about our expert-led training programs and tech hotline at 1-877-463-3574. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.
Product Features:
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Product Features:
- 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
Delphi – Direct Injection High Pressure Fuel Pump: With Gasket (Part No.HM10128)
from
$384.99
Demand for Gasoline Direct injection (GDi) technology globally is expected to grow in excess of 10 percent annually through 2026. Delphi uses the latest generation of OE technology for our GDi, and our GDi service program includes the OE parts, tools and know-how to service this fast-growing, high-performance technology. Delphi is a leading Tier 1 supplier of GDi systems to global OEMs. We offer multiple GDi specific training classes, a technician support hotline staffed by ASE certified technicians, and a full line of GDi high-pressure fuel pumps. Learn more about our training programs and tech hotline at 1-877-463-3574.
Product Features:
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Product Features:
- Capable of delivering fuel at high pressures that can range from 2,000 to 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
In-Demand Fuel Injectors for 2018 Audi A4s
Select from 4 premium Fuel Injectors parts for your 2018 Audi A4, with prices ranging from $17.99 to $175.99.
Delphi – Mass Air Flow Sensor (Part No.AF10656)
from
$175.99
Every single Delphi mass air flow (MAF) sensor that we manufacture – whether with or without the housing – is built with calibrated all-new components and is never remanufactured. Our mass air flow sensors are designed and tested to meet or exceed OE requirements, and engineered for a perfect fit in more than 180 million vehicles on the road today in North America – including makes from Ford, Toyota, Nissan, Volkswagen, Hyundai, BMW, Honda, GM, Mazda, Subaru, Acura and more.
Product Features:
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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
Carquest Premium – Premium GDI Seal Tool Kit (Part No.ATK-001)
from
$129.99
This premium tool kit is designed to ensure the correct installation of the combustion seal on Gasoline Direct Injectors (GDI), which require replacement any time the injector is reinstalled. This special tool allows for the expansion of the combustion seal to allow installation onto the injector’s tip and resizing tools to provide precise dimensioning to ensure proper combustion sealing. Constructed of high-quality stainless steel the tool will provide years of trouble-free service and can be used on over 100 unique styles of GDI injectors.
Product Features:
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Product Features:
- Includes two expansion cones
- Includes two resizing tools
- Includes one seal installation collet
- Includes hard case
- Includes instruction manual
Carquest Premium – Remanufactured GDI Fuel Injector (Part No.A512-1155)
from
$69.99
The CARQUEST line of remanufactured OEM fuel injectors are remanufactured using a proven 15 step process at a state-of-the-art remanufacturing facility in the USA Injectors are thoroughly 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.
Product Features:
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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
Carquest Premium – Fuel Injector Seal Kit (Part No.AS070)
from
$17.99
CARQUEST fuel injector seal kits include the necessary O-rings and seals to properly reseal the injector, which is a recommended practice any time the injector is removed. Includes hard to find or previously dealer-only components. Use CARQUEST tool kit ATK-001 or equivalent for proper installation of combustion seal.
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Product Features:
- Premium OE quality materials.
- Services one injector.
Most Sold 2018 Audi A4 Gas Caps
Explore our best-selling Audi parts for the 2018 A4 among 1 OEM and aftermarket options starting from $127.99.
Motorad – Tethered Fuel Cap: Twist-Lock, Direct Fit, Provides Tight Seal (Part No.MGC937T)
from
$127.99
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:
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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
FAQs for 2018 Audi A4 Fuel and Emissions Systems
Which Fuel and Emissions Systems are best-sellers for 2018 Audi A4s?
Out of 17 Fuel and Emissions Systems that fit 2018 Audi A4s, the following parts are the top sellers:
- Fuel Tank Cleaning Kit (11692237) – $12.49
- Wideband Oxygen Sensor: Air-Fuel Ratio 4 Wire, 18.8" Long, Heated, Direct Fit (12132207) – $153.99
- Direct Injection High Pressure Fuel Pump: Without Gasket/Seal or Wiring Harness (11951799) – $405.99
What’s the price range for 2018 Audi A4 Fuel and Emissions Systems?
Fuel and Emissions System prices for the 2018 Audi A4 start at $12.49 and go up to $459.99 for the most premium parts.
What’s the average price of a Fuel and Emissions System for a 2018 Audi A4?
The average price for Fuel and Emissions Systems for the 2018 Audi A4 is $182.15. 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?
What are the cheapest Fuel and Emissions Systems for my 2018 Audi A4?
The cheapest 2018 Audi A4 Fuel and Emissions Systems we carry in stock are:
- Fuel Tank Cleaning Kit (11692237) – $12.49
- Fuel Injector Seal Kit (12181224) – $17.99
- Remanufactured GDI Fuel Injector (12483380) – $69.99
- Manifold Absolute Pressure Sensor (12546106) – $111.99
- Tethered Fuel Cap: Twist-Lock, Direct Fit, Provides Tight Seal (50042421) – $127.99
What types of Fuel and Emissions Systems do you sell for my 2018 Audi A4?
As of 3/1/26, these are some of the most in-demand types of Fuel and Emissions Systems for a 2018 Audi A4:
Can I get help with 2018 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.
