2003 Audi TT Fuel and Emissions Systems
Find Your Specific 2003 Audi TT Fuel and Emissions Systems
Below you will find various in-demand Audi Fuel and Emissions Systems, components and accessories for your 2003 TT. Advance Auto Parts has popular TT parts like Gas Caps, Air Flow Sensors, Oxygen Sensors and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other TT model years including
2000,
2001,
2002,
2004,
2005,
2006,
2008,
2009 and more. Select a category of 2003 Audi TT Fuel and Emissions Systems below and start saving instantly.
Popular 2003 Audi TT Fuel and Emissions Systems Categories
Essential Fuel and Emissions Systems for 2003 Audi TTs
DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 22.87" Long, Heated, Exact Fit (Part No.234-5107)
from
$198.99
DENSO Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance. Each component is precision-built for exact replacement and a first time fit. DENSO gives you the right part and the right fit¿ the first time.
Product Features:
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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
Dorman – Mass Air Flow Sensor Connector (Part No.645-924)
from
$32.99
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:
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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 Length service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Bosch – Oxygen Sensor: 4 Wire, 68.7" Long, Heated, Exact Fit (Part No.16978)
from
$122.99
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:
- 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
Bosch – Fuel Injector (Part No.62855)
from
$99.99
Bosch is a leading manufacture for Gasoline Direct Injection application now provides the market with the solution for servicing the Injectors after being removed from the cylinder head. It is are recommended to replace the seals once the injectors are serviced as they are one time use. All Set of seal and kit bags come complete with all the necessary parts for a successful installation.
Product Features:
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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
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.
Product Features:
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Product Features:
- Premium OE quality materials.
- Services one injector.
Carquest Premium – Secondary Air Injection Pump Check Valve (Part No.EGA1181)
from
$49.99
The Secondary Air Injection system is an emission control device designed to pump fresh air into the engine exhaust system to reduce harmful emissions. The Air Injection Pump Check Valve will allow air flow in one direction only to prevent an engine back-fire condition.
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Product Features:
- Application matched component to ensure the system can be returned to like new condition.
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Dorman – Evaporative Emissions Purge Solenoid Valve (Part No.911-800)
from
$65.99
Engineered for a perfect fit and plug-and-play installation, this vapor canister purge valve is a direct replacement for the original equipment purge valve. It is critical to the evaporative emissions system and fulfills government requirements.
Product Features:
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Product Features:
- Direct replacement – this vapor canister purge valve fits and functions like original equipment to ensure proper function of your vehicle’s evaporative emissions system
- Quality construction – manufactured from premium materials for a long service life
- Excellent value – original equipment quality at a lower price
- Quality tested – has undergone testing to ensure proper fit and performance
Carquest Premium – Engine Crankcase Suction Pump (Part No.EGC1282)
from
$65.99
The Engine Crankcase Suction Pump is part of the crankcase ventilation system and is designed to pull the crankcase vapors from the crankcase and into the crankcase ventilation system where they are drawn into the engine air intake system and burned during the combustion process.
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Product Features:
- Application matched component to ensure the system can be returned to like new condition.
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Wells Vehicle Electronics – Fuel Injection Pressure Regulator 5G1566 (Part No.5G1566)
from
$53.99
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 OE designs. Every component either matches or improves on the OE design to ensure fast, easy installation, superior performance and reliability.
Product Features:
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Product Features:
- Application matched component to ensure the system can be returned to like new condition.
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Carquest Premium – Air Charge Temperature Sensor (Part No.WTA1883)
from
$67.99
The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.
Product Features:
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Product Features:
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
- 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
- 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
- Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
- Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
- Application matched components ensures system operation in like new condition.
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.
Product Features:
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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
Rein – Breather Hose (Part No.ABV0165)
from
$25.99
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:
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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.
Dorman – Secondary Air Injection Pump (Part No.306-031)
from
$476.99
This secondary air injection pump is designed to match the fit and function of the original pump on specified applications. Made of quality materials, it is engineered for reliable performance and durability.
Product Features:
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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
Carquest Premium – Diverter Valve (Part No.GAC1166)
from
$153.99
The Secondary Air Injection system is an emission control device designed to pump fresh air into the engine exhaust system to reduce harmful emissions and convert the emission into harmless water vapor via a chemical reaction. These systems were used heavily in the pre-catalytic converter emission control period but found some application in vehicles with catalytic converter systems.
Product Features:
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Product Features:
- Application matched component to ensure the system can be returned to like new condition.
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Carquest Premium – Diverter Valve (Part No.ECC2363)
from
$265.99
The Secondary Air Injection system is an emission control device designed to pump fresh air into the engine exhaust system to reduce harmful emissions and convert the emission into harmless water vapor via a chemical reaction. These systems were used heavily in the pre-catalytic converter emission control period but found some application in vehicles with catalytic converter systems.
Product Features:
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Product Features:
- Application matched component to ensure the system can be returned to like new condition.
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Carquest Premium – New Mass Air Flow Sensor – Sensor Only (Part No.MQ6269)
from
$117.99
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.
Product Features:
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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
Delphi – Mass Air Flow Sensor (Part No.AF10144)
from
$193.99
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 – Fuel Injector Seal Kit (Part No.274838)
from
$8.99
High-quality products that meet OE appearance and performance to provide professional technicians and DIYers with a cost-effective solution.
Product Features:
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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
Carquest Premium – Fuel Injector Seal Kit (Part No.AS060)
from
$25.99
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.
Product Features:
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Product Features:
- Designed to OE standards for ease of installation
URO Parts – Vacuum Check Valve (Part No.058905291K)
from
$3.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.
Product Features:
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Product Features:
- Guaranteed Fitment
- High Quality Materials
- Replaces cracked or failing OE vacuum check valves that can leak and degrade braking or engine performance
- Manufactured to original valve dimensions and shape for easy installation and reliable vacuum seal
- Durable heat resistant material accommodates engine vibration and intake vacuum fluctuations
Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17597)
from
$15.99
Product Features:
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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 – 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.
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
URO Parts – Multi Purpose Relay (Part No.8533176)
from
$6.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.
Product Features:
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Product Features:
- Guaranteed fitment
- Replacement of failed relay instantly restores proper electrical circuit performance
- Direct-fit OE reproduction design for easy plug-and-play installation
- Manufactured using high-quality materials to withstand intense vehicle heat and cold-weather condensation that can damage lesser quality relays
- Modern electronics resist electrical arcing and burnout for long-term reliability
- Factory tested for proper performance
Carquest Premium – Fuel Cap Tester Adapter: (Part No.12426)
from
$11.79
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Product Features:
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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
Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)
from
$17.79
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Product Features:
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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
Carquest Premium – Fuel Cap Tester Adapter: (Part No.12427)
from
$34.99
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Product Features:
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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
Upgrade your 2003 Audi TT with Top-Quality Fuel and Emissions Systems
When it comes to maintaining or upgrading your 2003 Audi TT, 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 TT functioning at its best. At Advance Auto Parts, we offer a wide selection of 35 Fuel and Emissions Systems for the 2003 Audi TT, designed to meet your needs without breaking the bank.
From
Gas Cap
replacements to
Air Flow 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 2003 Audi TT at great prices.
Our Fuel and Emissions Systems inventory for this model
ranges from just $3.99 to $476.99, with
an average price of $89.86.
Our 35 Fuel and Emissions Systems in stock come from 11 trusted brands, so you’re sure to find the right part for your 2003 Audi TT 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 2003 Audi TT, we stock popular OEM and aftermarket Fuel and Emissions Systems from top names
like Bosch, Carquest Premium, Dorman, and more.
Bosch Fuel and Emissions Systems
start at just $122.99 and boast an impressive 4.7 stars average rating from customers.
Carquest Premium and Dorman also bring quality to the table, with Fuel and Emissions Systems available starting at $12.99, and at an average 4.4 stars rating.
With 169 customer reviews and counting, our 2003 Audi TT 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 2003 Audi TT is always ready to roll. We’re committed to providing you with everything you need to keep your TT in top shape, all in one place.
Start shopping confidently below for your 2003 Audi TT!
Best-Selling Gas Caps for 2003 Audi TTs
Enhance the driving experience in your Audi with 2 quality Gas Cap components, starting at $12.99.
Carquest Premium – Locking Fuel Cap: Screw On, Direct Fit, Provides Tight Seal (Part No.10505)
from
$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:
See More
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
- Independently tested for emission control
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.
Product Features:
See More
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
Most Popular 2003 Audi TT Air Flow Sensors
Customize your Audi with 5 Air Flow Sensors products
like Air- Fuel Ratio Sensors,
Air Charge Temperature Sensors, and
Mass Air Flow Sensor Relays, all
priced under $185.99.
Dorman – Mass Air Flow Sensor Connector (Part No.645-924)
from
$32.99
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:
See More
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 Length service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
DENSO – Wideband Oxygen Sensor: Upstream, 5 Wire, 58.66" Long, Heated, Exact Fit (Part No.234-5115)
from
$185.99
DENSO Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled peformance. Each component is precision-built for exact replacement and a first time fit. DENSO gives you the right part and the right fit¿ the first time.
Product Features:
See More
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
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:
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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
Carquest Premium – Air Charge Temperature Sensor (Part No.WTA1883)
from
$67.99
The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.
Product Features:
See More
Product Features:
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
- 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
- 100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
- Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
- Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
- Application matched components ensures system operation in like new condition.
URO Parts – Multi Purpose Relay (Part No.8533176)
from
$6.99
For European vehicles, A.P.A. manufactures the URO Parts brand of quality replacement parts, which meet or exceed OEM specifications. URO Parts components are ideal for both professional and DIY vehicle repair, and are often the exclusive aftermarket alternative to overpriced ¿Genuine¿ components. By reducing deferred maintenance with URO Parts, you will increase the bottom line of your business. With its URO Premium line, A.P.A. offers problem-solving upgraded components that are superior to failure-prone OEM parts in design and/or materials. A.P.A. is so confident in the longevity and reliability of URO Premium products, . URO Parts also specializes in accurate reproduction parts for classic vehicles, including a huge variety of items that are no longer available from the dealer.
Product Features:
See More
Product Features:
- Guaranteed fitment
- Replacement of failed relay instantly restores proper electrical circuit performance
- Direct-fit OE reproduction design for easy plug-and-play installation
- Manufactured using high-quality materials to withstand intense vehicle heat and cold-weather condensation that can damage lesser quality relays
- Modern electronics resist electrical arcing and burnout for long-term reliability
- Factory tested for proper performance
Top Picks for 2003 Audi TT Oxygen Sensors
Upgrade Audi TTs with top-quality Oxygen Sensors parts, including 5 OEM and aftermarket selections for your 2003 model.
Bosch – Wideband Oxygen Sensor: 5 Wire, 58.86" Long, Heated, Exact Fit (Part No.17351)
from
$133.99
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
- Pre-coated threads with anti-seize compound right out of the box
Bosch – Oxygen Sensor: 4 Wire, 68.7" Long, Heated, Exact Fit (Part No.16978)
from
$122.99
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:
- 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
Bosch – Oxygen Sensor: 4 Wire, 24.92" Long, Heated, Universal (Part No.15733)
from
$92.99
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:
- 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
DENSO – Oxygen Sensor: 4 Wire, 69.21" Long, Heated, Exact Fit (Part No.234-4874)
from
$136.99
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.
Product Features:
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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
NTK – Switching Oxygen Sensor: 4 Wire, 43.25" Long, Heated, Direct Fit (Part No.25689)
from
$118.99
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.
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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
In-Demand Fuel Pumps for 2003 Audi TTs
Select from 2 premium Fuel Pumps parts for your 2003 Audi TT, with prices ranging from $17.79 to $34.99.
Carquest Premium – Fuel Cap Tester Adapter: (Part No.12427)
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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.
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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
Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)
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$17.79
Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.
Product Features:
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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
Most Sold 2003 Audi TT Fuel Injectors
Explore our best-selling Audi parts for the 2003 TT among 10 OEM and aftermarket options starting from $8.99.
Bosch – Mass Air Flow (MAF) Sensor (Part No.0280218063)
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$169.99
Bosch is the actual OE manufacture, plus or minus 5% deviation from OE specification can set a check engine light
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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 – Remanufactured Multi Port Fuel Injector (Part No.A212-1845)
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$61.99
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.
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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 – New Mass Air Flow Sensor – Sensor Only (Part No.MQ6219)
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$137.99
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
Bosch – Fuel Injector: New (Part No.62678)
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$99.99
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 – Fuel Injector Seal Kit (Part No.274838)
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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.
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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
Carquest Premium – New Mass Air Flow Sensor – Complete Assembly (Part No.MQ7372)
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$138.99
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.
Product Features:
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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
Delphi – Mass Air Flow Sensor (Part No.AF10157)
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$199.99
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.
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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
Delphi – Fuel Injection Pressure Regulator (Part No.FP10303)
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$81.99
Precision is key for the fuel pressure regulator on any vehicle. At Delphi, we use OE engineering to test our regulators and fuel technologies to ensure the utmost performance and durability. Our Nitrile¿ diaphragms are resilient against high-ethanol fuels, and we utilize two designs to help meet emissions standards while covering a wide array of domestic vehicles. With over 30 OE-proprietary innovations and 150 patents in fuel technologies, Delphi is regarded as a market leader in North American fuel management. 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:
- 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
Wells Vehicle Electronics – Fuel Injection Pressure Regulator 5G1046 (Part No.5G1046)
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$56.99
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 OE designs. Every component either matches or improves on the OE design to ensure fast, easy installation, superior performance and reliability.
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Product Features:
- Application matched components ensure fuel injection system meets all emission regulations.
- Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Victor Reinz – Fuel Injector O-Ring Kit (Part No.18-10027-01)
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$8.99
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.
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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.
Top-Rated Fuel and Emissions Systems Brands For Your 2003 Audi TT
Shop for the best-rated brands offering Fuel and Emissions Systems and other products for your 2003 Audi TTs. Below you’ll find some of our best rated Fuel and Emissions Systems from Bosch, Carquest Premium, and Dorman, and more. Fuel and Emissions Systems from these brands that fit a 2003 TT start at just $12.99 and are rated as high as 4.7 stars. OEM and aftermarket Fuel and Emissions Systems don’t get more top quality, durable, and affordable than from the brands below.
Popular Bosch 2003 Audi TT Fuel and Emissions Systems
When it comes to maintaining or upgrading your 2003 Audi TT, using quality Fuel and Emissions Systems is essential to ensure durability and a perfect fit. Bosch ticks all of those boxes. We offer a wide selection of Bosch Fuel and Emissions Systems, specifically designed for the 2003 Audi TT. With over 3 Bosch 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 $122.99, with an average price of just $142.32. Plus, with over 11 customer reviews and an average rating of 4.7 stars, you can trust that our Bosch Fuel and Emissions Systems will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.
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$122.99
(2)
Oxygen Sensor: 4 Wire, 68.7" Long, Heated, Exact Fit
“Price good better than other auto parts. Stores”
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$133.99
(7)
Wideband Oxygen Sensor: 5 Wire, 58.86" Long, Heated, Exact Fit
“Great product great price”
Popular Carquest Premium 2003 Audi TT Fuel and Emissions Systems
Carquest Premium auto parts is one of the highest quality Fuel and Emissions System brands in the market. Any 2003 Audi TT owner should feel confident when installing genuine Carquest Premium parts in their vehicle. To ensure the best fit and performance for your 2003 TT, Advance Auto Parts carries a full inventory of 2 Carquest Premium Fuel and Emissions Systems. Plus you will be keeping your Audi in peak condition while saving money because prices on these Carquest Premium Fuel and Emissions Systems range from $12.99 to $20.99, plus, with more than 3 customer reviews and an impressive 4.4 stars average rating, you can be confident the Fram Fuel and Emissions Systems below will deliver on both quality and value.
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$12.99
(2)
Non-Locking Fuel Tank Cap
“After reaching the gas station and opening the door to the gas tank, I discovered my gas cap was not there. The check engine light came on the dash a ”
FAQs for 2003 Audi TT Fuel and Emissions Systems
Which Fuel and Emissions Systems are best-sellers for 2003 Audi TTs?
Out of 35 Fuel and Emissions Systems that fit 2003 Audi TTs, the following parts are the top sellers:
- Fuel Tank Cleaning Kit (11692237) – $12.49
- Oxygen Sensor: 4 Wire, 68.7" Long, Heated, Exact Fit (10182770) – $122.99
- Remanufactured Multi Port Fuel Injector (11450338) – $61.99
What’s the price range for 2003 Audi TT Fuel and Emissions Systems?
Fuel and Emissions System prices for the 2003 Audi TT start at $3.99 and go up to $476.99 for the most premium parts.
What’s the average price of a Fuel and Emissions System for a 2003 Audi TT?
The average price for Fuel and Emissions Systems for the 2003 Audi TT is $89.86. 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 TT model years?
What are the cheapest Fuel and Emissions Systems for my 2003 Audi TT?
The cheapest 2003 Audi TT Fuel and Emissions Systems we carry in stock are:
- Vacuum Check Valve (50184441) – $3.99
- Multi Purpose Relay (50184798) – $6.99
- Fuel Injector Seal Kit (10981517) – $8.99
- Fuel Injector O-Ring Kit (12548039) – $8.99
- Fuel Tank Cleaning Kit (11692237) – $12.49
What are the top-rated Fuel and Emissions Systems that fit the 2003 Audi TT?
Out of 169 reviews by customers, our 2003 Audi TT Fuel and Emissions Systems have an average customer rating of . These are some of the highest-rated Fuel and Emissions System types for the 2003 Audi TT and their top-rated products:
- Vapor Canister Purge Valves
- Evaporative Emissions Purge Solenoid Valve (10017804) – $65.99
What types of Fuel and Emissions Systems do you sell for my 2003 Audi TT?
As of 3/1/26, these are some of the most in-demand types of Fuel and Emissions Systems for a 2003 Audi TT:
Can I get help with 2003 Audi TT 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 TT Fuel and Emissions Systems?
Advance Auto Parts keeps returns simple. For new Audi TT 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.
