1998 Audi A4 Fuel and Emissions Systems

Name: Breather Hose
Brand: Rein
SKU: ABV0183
Price: 5.99 USD

Below you will find various in-demand Audi Fuel and Emissions Systems, components and accessories for your 1998 A4. Advance Auto Parts has popular A4 parts like Gas Caps, Fuel Pumps, Air Flow Sensors 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 1998 Audi A4 Fuel and Emissions Systems below and start saving instantly.

Popular 1998 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

Smog Pumps

Canister Purge Solenoids

EGR Valves

Fuel Injectors

Pressure Regulators

Air Charge Temperature Sensors

Fuel Injection Idle Air Control Valves

Fuel Injector O-Ring Kits

Fuel Injector Seal Kits

Vacuum Check Valves

Fuel Injector Gaskets

EGR Valve Control Switches

Mass Air Flow Sensor Connectors

Fuel Injection Relays

Fuel Injection Manifold Pressure Sensors

Engine Crankcase Suction Pumps

Fuel Injector O-rings

EGR Valve Gaskets

Diesel Fuel Line Seal Rings

Crankcase Breather Hoses

Crankcase Breather Hose Connectors

EGR Valve Temperature Sensors

Fuel Injection Pressure Regulator O-Rings

Fuel Cap Tester Adapters

Emission Check Valves

Air Flow Meter Gaskets

Essential Fuel and Emissions Systems for 1998 Audi A4s

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$5.99

Rein Automotive OE quality breather hoses fit European vehicles the way the original manufacturer intended. Designed to be direct replacements for OE hoses, Rein hoses are identical to the OEM.

Product Features:

Matches original equipment design specifications.
Manufactured with high quality materials.
Direct fit for easy installation.
Resistant to heat, salt, road debris, oil and other contaminants.

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$597.99

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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$139.87

EGR Vacuum Solenoid

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$304.99

The Idle Air Control valve is an electronic device used by the engine control module (ECM) to control engine idle speed. The control valve will be mounted in the throttle body on the engine and allows air to bypass the throttle plate during a closed throttle condition. The valve is also used on many applications to control vehicle speed when the vehicle cruise control is engaged, the ECM will allow air to bypass the throttle plate while monitoring vehicle speed and other signal inputs.

Product Features:

Robust design increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
Precision-wound coated copper windings increase product durability and life cycle.
Application matched to meet all design and operating characteristics as intended by the vehicle manufacturer.
100% end-of-line tested to ensure confidence and product reliability.

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$452.57

Bosch Manifold Absolute Pressure (MAP) Sensors provide accurate air pressure measurement to very fine tolerances for efficient engine performance.

Product Features:

Extremely sturdy design with a special coating for resistance of harmful chemicals inside the intake manifold.
Bosch continually improves its MAP sensor designs with the latest chip technology.
Designed to meet or exceed your vehicle’s original equipment specifications (performance, driveability, economy, emissions)

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$175.64

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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$646.25

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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$3.38

EGR Adapter Gasket

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$63.74

The high-performance TEV canister purge valve constructed of plastic complies with all the requirements of manifold injection and gasoline direct injection.

Product Features:

Favorable price-to-performance ratio
Optimized triggering when minimal amounts are detected, giving quiet idling
Steeper rise of characteristic line
High maximum flow Installation on engine generates less noise
Integrated protective sieve prevents accumulation of dirt
Compact and light
Quick and simple fitting

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$65.99

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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$14.99

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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$115.03

Vapor Canister Purge

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$3.29

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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$34.99

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

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$41.83

Fuel Injector Repair

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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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$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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$20.99

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:

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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$2.06

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$13.01

Vacuum Check Valve

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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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$63.99

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$42.11

Breather Hose

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$347.99

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$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.

Product Features:

Helps avoid premature fuel pump failure
Lint free towel included
Low suds formulation
Removes harmful contaminants from the fuel tank

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$126.99

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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$53.49

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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$88.99

Bosch Gasoline Direct Injection (GDI) provides the basis for a cleaner and more economical engine generation. At the same time, it contributes to the current engine downsizing trend. The Bosch fuel injector has a return rate of 1 part per million (PPM), making Bosch the industry benchmark. 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:

OE supplier, provides exact flow and original spray pattern for optimal performance
Enhances a homogeneous and lean-burn combustion
Key enabler for engine downsizing, while maintaining desired horsepower
High-pressure fuel is injected directly into the combustion chamber
Maintains new-car smoothness and drivability

Upgrade your 1998 Audi A4 with Top-Quality Fuel and Emissions Systems

When it comes to maintaining or upgrading your 1998 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 93 Fuel and Emissions Systems for the 1998 Audi A4, designed to meet your needs without breaking the bank. From Gas Cap replacements to Fuel Pumps 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 1998 Audi A4 at great prices. Our Fuel and Emissions Systems inventory for this model ranges from just $1.09 to $476.99, with an average price of $98.52. Our 93 Fuel and Emissions Systems in stock come from 32 trusted brands, so you’re sure to find the right part for your 1998 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 1998 Audi A4, we stock popular OEM and aftermarket Fuel and Emissions Systems from top names like FELPRO, and more. FELPRO Fuel and Emissions Systems start at just $2.49 and boast an impressive 5 stars average rating from customers. With 379 customer reviews and counting, our 1998 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 1998 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 1998 Audi A4!

Best-Selling Gas Caps for 1998 Audi A4s

Enhance the driving experience in your Audi with 4 quality Gas Cap components, starting at $12.99.

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$20.99

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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$12.99

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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$15.99

Come pre-assembled for quick and easy installation.
Several fastener options to work with any fuel cap compartment configuration
Fits vehicles orginally equipped with tether
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

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$45.39

Blau 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.

Most Popular 1998 Audi A4 Fuel Pumps

Customize your Audi with 6 Fuel Pumps products like Fuel Pumps, Fuel Pump Relays, and Fuel Cap Tester Adapters, all priced under $444.65.

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$55.99

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$444.65

The VDO Electric Fuel Pump 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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$356.99

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:

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 and to avoid low-fuel hesitation, including alcohol fuels and blends
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
When servicing the fuel system, always check the fuel filter for possible replacement
Always be sure to check and clean fuel tank to avoid unnecessary returns
Always replace the fuel strainer when doing a fuel pump repair

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$178.99

Carquest Premium fuel pump modules and assemblies are built to meet or exceed Original Equipment (OE) specifications for fit, form and function. We have invested in industry-leading quality improvements like upgraded turbine impellers and 100% carbon commutators to deliver greater reliability. Carquest Premium fuel pump modules are supplied with the pump strainer and gaskets or seals when required for the application. Carquest Premium fuel pump modules are engineered with superior quality components to provide the longest life and reliable performance.

Product Features:

Meets or exceeds OE specifications for fit, form and function
100% carbon commutators provide resistance to aggressive fuels and double the life expectancy of the pump
OE upgraded turbine impellers greatly reduce fuel pulsation
All fuel pumps are 100% performance tested
Includes installation gaskets or seals where applicable

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$34.99

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

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$15.99

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

Top Picks for 1998 Audi A4 Air Flow Sensors

Upgrade Audi A4s with top-quality Air Flow Sensors parts, including 6 OEM and aftermarket selections for your 1998 model.

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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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$134.94

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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$114.51

Oxygen Sensor

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$107.95

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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$63.99

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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

In-Demand Fuel Injectors for 1998 Audi A4s

Select from 32 premium Fuel Injectors parts for your 1998 Audi A4, with prices ranging from $1.09 to $389.41.

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$2.49

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 and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Validated for fit, form, and function

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$279.99

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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$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

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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$10.29

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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$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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$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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$61.92

An essential part of the Fuel System, the Fuel Pressure Regulators’ sole purpose is to maintain fuel pressure at a constant differential to manifold vacuum under all engine load conditions.

Product Features:

Corrosion resistant housing material
Premium diaphragm materials for longer service life
Internal precision components maintain stable fuel pressure and ensure adequate fuel return
Meets or exceeds OEM specifications

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$389.41

Bosch air mass sensors are built to exacting specifications as required for such a sensitive measuring device. Through a precise manufacturing process, the correct type and thickness of platinum wire or thick film ceramic measuring elements are selected and accurately calibrated to provide optimum performance.

Product Features:

OEM Quality Direct fit Application
Measurement of air mass (gas mass) through-flow per unit of time, independent of density and temperature
Extensive measuring range
Highly sensitive, particularly for small changes in flow rate
Wear-free since there are no moving parts
Insensitive to dirt and contamination
Utilizes the factory style mounts, connectors and fittings
Provides exceptional reliability

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$286.99

CARDONE Engineered Technology ensures that all CARDONE New Mass Air Flow Sensors precisely track O.E. output curves and maintain strict tolerances to ensure accurate scan tool readings for proper operation. Every component is rated to handle a broad range of environmental conditions, including temperature and altitude.

Product Features:

All modules are 100% tested with automated computer test equipment to ensure full functionality and reliability.
Our sensors precisely track O.E. output curves and maintain spec tolerances to ensure accurate feedback to the vehicle’s engine control management system.
Components are rated to handle demanding temperature variations for optimum reliability in every environment.
Guaranteed O.E. fit and function.

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$255.73

VDO mass air flow sensors, or MAFS, are new OE sensors made and manufactured to the highest quality and original equipment specifications. MAFS are essential in optimizing fuel economy and ensure your vehicle is running at peak performance and efficiency.

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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$238.99

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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$231.33

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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$213.45

Air Mass Sensor

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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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$169.99

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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$168.99

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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$167.99

CARDONE Remanufactured Mass Air Flow Sensors (MAFS) precisely track O.E. output curves and maintain specific tolerances to ensure accurate scan tool readings for proper operation. 100% re-soldering of critical components ensures superior electrical connections, eliminates intermittent failures and lengthens product life. With CARDONE Mass Air Flow Sensors (MAFS), you can expect smooth vehicle performance.

Product Features:

100% re-solder of critical components ensures superior electrical connections, no intermittent failures and longer product life.
On-car vehicle validation routines ensure that modules meet all form, fit, durability and performance requirements.
All modules are 100% tested with automated computer test equipment to ensure full functionality and reliability.
Our sensors precisely track O.E. output curves and maintain spec tolerances to ensure accurate feedback to the vehicle┐s engine control management system.
Components are rated to handle demanding temperature variations for optimum reliability in every environment.
As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80%.

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$149.96

Air Mass Meter

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$133.99

100% re-solder of critical components ensures superior electrical connections, no intermittent failures and longer product life.
On-car vehicle validation routines ensure that modules meet all form, fit, durability and performance requirements.
All modules are 100% tested with automated computer test equipment to ensure full functionality and reliability.
Our sensors precisely track O.E. output curves and maintain spec tolerances to ensure accurate feedback to the vehicle┐s engine control management system.
Components are rated to handle demanding temperature variations for optimum reliability in every environment.
As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80%.

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$132.99

Continental mass air flow sensors, or MAFS, are the genuine OEM part. Continental sensors are made and manufactured to the highest quality and original equipment specifications. They are identical in fit, form, and function and provide the genuine quality of OE components supplied to auto manufacturers worldwide. MAFS are essential in optimizing fuel economy and ensure your vehicle is running at peak performance and efficiency.

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$58.99

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$53.49

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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$53.49

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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$44.49

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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$31.37

AIR MASS METER GASKE

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$14.36

FI Throttle Body Mou

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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

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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$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

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$1.09

Fuel Injector O-Ring

Most Sold 1998 Audi A4 Oxygen Sensors

Explore our best-selling Audi parts for the 1998 A4 among 13 OEM and aftermarket options starting from $78.99.

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$100.99

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:

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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$86.99

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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$102.99

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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$91.99

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

$78.99

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

from

$86.99

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

from

$169.75

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

$147.45

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

from

$129.99

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

from

$118.99

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

from

$111.99

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

$107.99

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

$101.99

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

Top-Rated Fuel and Emissions Systems Brands For Your 1998 Audi A4

Shop for the best-rated brands offering Fuel and Emissions Systems and other products for your 1998 Audi A4s. Below you’ll find some of our best rated Fuel and Emissions Systems from FELPRO, and more. Fuel and Emissions Systems from these brands that fit a 1998 A4 start at just $2.49 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 1998 Audi A4 Fuel and Emissions Systems

When it comes to maintaining or upgrading your 1998 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 1998 Audi A4. With over 3 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 $2.49, with an average price of just $5.92. Plus, with over 111 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.

from
$7.49

(109)

Fuel Injector O-Ring Kit

“Replaced the boring in my TBSS fuel injectors and there is no more leaks.”

from
$2.49

(2)

Fuel Injection Throttle Body Mounting Gasket

“Perfect fit on 2001 Jetta 1.8t”

from
$7.79

This product is not rated

Fuel Injection Throttle Body Mounting Gasket

“”

FAQs for 1998 Audi A4 Fuel and Emissions Systems

Which Fuel and Emissions Systems are best-sellers for 1998 Audi A4s?

Out of 93 Fuel and Emissions Systems that fit 1998 Audi A4s, the following parts are the top sellers:

Fuel Tank Cleaning Kit (11692237) – $12.49
Fuel Cap: 10835, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (18481526) – $12.99
Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with 8 O-Rings (11906669) – $9.99

What’s the price range for 1998 Audi A4 Fuel and Emissions Systems?

Fuel and Emissions System prices for the 1998 Audi A4 start at $1.09 and go up to $476.99 for the most premium parts.

What’s the average price of a Fuel and Emissions System for a 1998 Audi A4?

The average price for Fuel and Emissions Systems for the 1998 Audi A4 is $98.52. 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 1998 Audi A4?

The cheapest 1998 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 Injection Throttle Body Mounting Gasket (15780637) – $2.49
Fuel Injector Seal (11474383) – $2.51
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 1998 Audi A4?

As of 2/5/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 1998 Audi A4:

Can I get help with 1998 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.

1998 Audi A4 Fuel and Emissions Systems

Rein – Breather Hose (Part No.ABV0183)

Dorman – Secondary Air Injection Pump (Part No.306-029)

Pierburg – EGR Vacuum Solenoid (Part No.B7008274290APG)

Carquest Premium – Idle Air Control Valve (Part No.ABC3768)

Bosch – MAP Sensor (Part No.C704435966BOS)

Bosch – Bosch Oxygen Sensor (Part No.C5010647781BOS)

VDO – Electric Fuel Pump Assembly (Part No.E3001947460VDO)

Elring – EGR Adapter Gasket (Part No.B7102387165ELR)

Bosch – Bosch Purge Valve (Part No.B708062614BOS)

Carquest Premium – Engine Crankcase Suction Pump (Part No.EGC1282)

Carquest Premium – Fuel Pump Relay (Part No.RAA2248)

Bosch – Vapor Canister Purge (Part No.B7098140743BOS)

ACDelco – Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with 2 O-Rings (Part No.217-3366)

Carquest Premium – Fuel Cap Tester Adapter (Part No.12427)

Elring – Fuel Injector Repair (Part No.C1040468293ELR)

Wells Vehicle Electronics – Fuel Injection Pressure Regulator (Part No.5G1368)

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

Carquest Premium – Locking Fuel Cap: 10505, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10505)

Bosch – Fuel Injector Seal (Part No.C101016838BOS)

APA/URO Parts – Vacuum Check Valve (Part No.O404032232APA)

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

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

Burgaflex – Breather Hose (Part No.B2010327527BUR)

Carquest Premium – Exhaust Gas Recirculation (EGR) Valve Temperature Sensor (Part No.EGA2138)

Delphi – Fuel Tank Cleaning Kit (Part No.FC01)

Carquest Premium – Remanufactured Fuel Injector (Part No.A512-1195)

Carquest Premium – Remanufactured Fuel Injector (Part No.A212-1775)

Bosch – Fuel Injector 62830: New (Part No.62819)

Carquest Premium – Locking Fuel Cap: 10505, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10505)

Carquest Premium – Fuel Cap: 10835, Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10835)

Motorad – Tethered Fuel Cap (Part No.MGC835T)

BLAU – Fuel Tank (Gas) Cap (Part No.E201031981BLA)

Carquest Premium – Multi Purpose Relay (Part No.RAA1816)

VDO – Electric Fuel Pump (Part No.E300087836VDO)

Delphi – Electric Fuel Pump and Strainer Set: 12V, With 2 Male Blade Terminals, External Strainer (Part No.FE0724)

Carquest Premium – Fuel Pump Module Assembly M2287930: Fuel Pump, Sending Unit and Strainer (Part No.M2287930)

Carquest Premium – Fuel Cap Tester Adapter (Part No.12427)

Carquest Premium – Fuel Cap Tester Adapter (Part No.12410)

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

Bosch – Oxygen Sensor (Part No.C501085507BOS)

DENSO – Oxygen Sensor (Part No.C5010690386ND)

Bosch – Bosch Oxygen Sensor (Part No.C501051179BOS)

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

Bosch – Air Temperature Sensors (Part No.C600084793BOS)

Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.61092)

Hitachi – Air Flow Sensor – New Actual OE Part (Part No.MAF0021)

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

ACDelco – Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with 8 O-Rings (Part No.217-3365)

ACDelco – Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with Seals with 2 O-Rings (Part No.217-3414)

Carquest – Fuel Injector Seal Kit (Part No.274838)

Felpro – Fuel Injection Throttle Body Mounting Gasket (Part No.61491)

Bosch – Bosch Fuel Pressure Regulator (Part No.C300056477BOS)

Bosch – Air Mass Meter (Part No.B3130721596BOS)

Cardone New – New Mass Air Flow Sensor (Part No.86-10020)

VDO – VDO Air Mass Meter (Part No.B313084812VDO)

Delphi – Mass Air Flow Sensor (Part No.AF10165)

Hitachi – Mass Air Meter (Part No.B3130396170HIT)

Spectra Premium – Air Mass Sensor (Part No.B31502468219RPT)

Delphi – Fuel Injection Pressure Regulator (Part No.FP10312)

Hitachi – Air Flow Sensor – New Actual OE Part (Part No.MAF0020)

Carquest Premium – Mass Air Flow Sensor (MAF) – 100% NEW (Part No.MQ6268)

Cardone – Remanufactured Mass Air Flow Sensor (Part No.74-10020)

Hella – Air Mass Meter (Part No.B313052735HEL)

Cardone – Remanufactured Mass Air Flow Sensor (Part No.74-50038)

Continental – Mass Air Flow Sensor (Part No.A2C59512900)

Wells Vehicle Electronics – Fuel Injection Pressure Regulator (Part No.5G1368)

Carquest Premium – Remanufactured Fuel Injector (Part No.A212-1795)

Carquest Premium – Remanufactured Fuel Injector (Part No.A212-1775)

Carquest Premium – Remanufactured Fuel Injector (Part No.A212-1815)

Ajusa – AIR MASS METER GASKE (Part No.B3135317595AJU)

Mahle – FI Throttle Body Mou (Part No.C700184802MAH)

Bosch – Fuel Injector Seal Kit (Part No.C106016844BOS)

Victor Reinz – Fuel Injector O-Ring Kit (Part No.18-10027-01)

ACDelco – Fuel Injector Fuel Feed and Return Pipe O-Ring Kit with 2 O-Rings (Part No.217-3366)

Bosch – Fuel Injector Seal (Part No.C101016838BOS)

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

Bosch – Oxygen Sensor: 4 Wire, 24.02" Long, Heated, Universal (Part No.15738)

Bosch – Oxygen Sensor: 4 Wire, 53.35" Long, Heated, Exact Fit (Part No.15160)

DENSO – Oxygen Sensor: 4 Wire, 30.91" Long, Heated, Exact Fit (Part No.234-4664)