2004 Audi TT Emission Control

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    • (0 reviews)
      # mpn1032497591
      Audi TT Quattro 3.2L 2004, Secondary Air Injection Pump by URO Parts®. Position: Secondary. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $136.76
    • (0 reviews)
      # 57001392
      Audi TT 2004, Oxygen Sensor by Denso®. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture under idle, moderate...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $58.07 - $136.63
    • (0 reviews)
      # 86086867
      Audi TT 2004, Professional™ Oxygen Sensor by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Professional Oxygen Sensors...
      ACDelco Professional Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditionsCustomers can receive better gas mileage with a properly working oxygen sensor
      $76.13 - $136.32
    • (0 reviews)
      # 21073940
      Audi TT 2004, Air Fuel Ratio Sensor by Denso®. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products designed by Denso. Engineered with the...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $94.87 - $218.67
    • (0 reviews)
      # mpn44435448
      Audi TT 2004, Oxygen Sensor by Standard®. Position: Downstream. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...
      One-piece laser welded body for maximum protection and precise operation maintaining sensor integrityDual internal talc seal makes Our Oxygen sensors last longer
      $68.18
    • (0 reviews)
      # mpn2396922387
      Audi TT / TT Quattro 2004, Intermotor™ Vapor Canister by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...
      OE quality parts from top original equipment and aftermarket manufacturersEach fuel vapor canister is designed and tested to OE specifications for a direct-fit replacement controlling the loss of evaporative emissions from fuel systems to the environment.
      $303.66
    • (0 reviews)
      # 7866511
      Audi TT 2004, Secondary Air Injection Pump by Pierburg®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas...
      High quality at an affordable priceExpertly made from premium materials
      $256.84 - $424.94
    • (2 reviews)
      # 24140566
      Audi TT 2004, Premium Oxygen Sensor by Bosch®. Position: Downstream. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen Sensor from Bosch...
      Up to 15 % savings in fuel costsReduced CO2 emissions
      $57.34 - $89.96
    • (0 reviews)
      # 24140592
      Audi TT 2004, Universal Fit Oxygen Sensor by Bosch®. Position: Downstream. Universal Oxygen Sensors with OE SmartLink are quick and easy to install. Each sensor has enough length of sensor wire to allow maximum replacement of worn...
      Patented SmartLink™ connector systemNo special tools required for installation
      $39.64
    • (0 reviews)
      # 24140581
      Audi TT 2004, Wideband Oxygen Sensor by Bosch®. Position: Upstream. This sensor utilizes a sophisticated sensing element enabling it to produce a precise output in proportion to the air/fuel ratio. Wideband sensors use a more...
      Detects the exact amount of unburned fuel in the exhaust streamOE connectors and OE-style harness for continuous wire from connector to sensor
      $81.88 - $103.54
    • (0 reviews)
      # 152247405
      Audi TT 2004, Air Fuel Ratio Sensor by NTK®. Air/Fuel Ratio Sensors Utilize a Sophisticated Sensing Element that Enables Them to Produce a Precise Output in Proportion to the Air/Fuel Ratio. AFR Sensors Provide the ECU with an Exact AFR...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $64.59 - $114.41
    • (0 reviews)
      # 22132646
      Audi TT 2004, Oxygen Sensor by NTK®. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor element then sends voltage signals back to the...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $58.12 - $97.95
    • (0 reviews)
      # 81757438
      Audi TT 2004, Oxygen Sensor by Delphi®. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and aftermarket engineers partnering together to develop the most...
      OE connectors and wire lengths within 3" of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $61.11 - $98.16
    • (0 reviews)
      # 22809754
      Audi TT 2004, Oxygen Sensor by Spectra Premium®. To ensure your vehicle has optimal performance and fuel economy while producing minimal emissions replace a defective O2 sensor with one backed by the aftermarket’s most rigorous...
      Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements
      $52.94 - $176.09
    • (0 reviews)
      # mpn53631356
      Audi TT / TT Quattro 1.8L 2004, Intermotor™ PCV Valve by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $17.71
    • (0 reviews)
      # mpn1032497398
      Audi TT 2004, PCV Valve by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make your exhaust system work as it should...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $9.55
    • (0 reviews)
      # mpn1542324330
      Audi TT / TT Quattro 1.8L 2004, PCV Valve by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the...
      OE quality products from top original equipmentTop quality materials
      $11.89
    • (0 reviews)
      # 689683289
      Audi TT 2004, PCV Valve by Kayser®. The production and development of filters for the automotive industry has been a tradition in company. Since 1960 Kayser have been active in this business field and have gained a much expertise...
      High-grade design and construction built to last for yearsPerfect for use in high-speed environments
      $12.94 - $29.35
    • (1 review)
      # 7866619
      Audi TT 2004, EGR Valve by Pierburg®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas running out to the...
      High quality at an affordable priceExpertly made from premium materials
      $102.17 - $133.11
    • (0 reviews)
      # 326285375
      Audi TT 2004, Secondary Air Injection Pump by Dorman®. Dorman’s A.I.R. Pump comes with all the hardware and other components necessary for a complete repair. Since this part is a direct replacement, the exact fit adds another layer of...
      Save money by replacing only the failed pump - instead of the entire mating cover assemblyReplacement restores A.I.R. System to proper functioning
      $408.95 - $475.95
    • (0 reviews)
      # 35541432
      Audi TT 2004, Secondary Air Injection Pump by Cardone®. Import. 100% testing of all units guarantees reliable performance every time. High temperature grease extends bearing life, resulting in longer pump life. New carbon shoes/vanes on...
      50-state emissions street legal100% testing of all units guarantees reliable performance every time.
      $111.02 - $273.98
    • (0 reviews)
      # 824125591
      Audi TT 2004, Secondary Air Injection Pump by Pierburg®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $284.12 - $313.41
    • (0 reviews)
      # mpn1841082
      Audi TT Engine Family Number # 4ADXV01.8346 2004, CalCat™ Catalytic Converter and Pipe Assembly by Walker®. Emissions: CARB compliant. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2...
      $306.37
    • (0 reviews)
      # mpn1841067
      Audi TT 2004, Ultra™ Catalytic Converter and Pipe Assembly by Walker®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Catalytic Converter...
      $200.15
    • (0 reviews)
      # 286159535
      Audi TT 2004, Catalytic Converter by Eastern®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. With 1 O2 Sensor Port. Whether your catalytic converter is damaged by road debris or failed due to an engine...
      $61.61 - $173.11
    • (0 reviews)
      # 165395075
      Audi TT 2004, Catalytic Converter and Pipe Assembly by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Direct Fit. The growing concern for the environment means there is a growing need for quality emission control...
      $235.59 - $453.67
    • (0 reviews)
      # 128873350
      Audi TT Quattro 2004, Catalytic Converter by AP Exhaust®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Without Air Tube. Without O2 Sensor Port. Three-Way No / Air OBDII By Design US-EPA Compliant catalytic...
      $125.50 - $197.12
    • (0 reviews)
      # 83034980
      Audi TT 2004, Catalytic Converter and Pipe Assembly by Davico®. Emissions: EPA compliant. Converter Configuration: Direct Fit. This direct-fit catalytic converter by Davico will be a great solution to replace your failed or damaged...
      $196.78 - $430.31
    • (0 reviews)
      # 380730343
      Audi TT 2004, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Without Air Tube. If your car needs replacement, install one that will get you through the smog check. This...
      $290.71 - $529.10
    • (0 reviews)
      # 89448275
      Audi TT 2004, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall...
      $100.27
    • (0 reviews)
      # 316913760
      Audi TT with LEV Specification / with LEV1 Specification 2004, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Direct Fit. Without Air Tube. If your car needs replacement, install one that...
      $408.37 - $775.16
    • (0 reviews)
      # 380730349
      Audi TT 2004, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Without Air Tube. Catalytic Converter Overall Length: 15". If your car needs a new catalytic converter, install...
      $231.40 - $241.20
    • (0 reviews)
      # 380730345
      Audi TT 2004, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. If your car needs replacement, install one that will get you through the smog check. This converter is part of the...
      $349.54 - $627.92
    • (0 reviews)
      # 380730350
      Audi TT 2004, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Converter Overall...
      $122.43
    • (0 reviews)
      # mpn4488435335
      Audi TT Quattro 1.8L 2004, Lambda Temperature Sensor by Genuine®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
      High quality at an affordable priceExpertly made from premium materials
      $264.87
    • (0 reviews)
      # mpn53630550
      Audi TT / TT Quattro 2004, Intermotor™ Vapor Canister Purge Solenoid by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $84.18
    • (1 review)
      # mpn64897
      Audi TT / TT Quattro 1.8L 2004, Vapor Canister Purge Valve by Dorman®. Location: Near Intake Manifold. Dorman's Vapor Canister Purge Valve restores on-board diagnosis of the EVAP system. Plus, its high quality metal and plastic...
      Designed for enduring resistance to harsh road and weather conditionsDirect replacement for a proper fit every time
      $19.75
    • (0 reviews)
      # mpn4494250757
      Audi TT / TT Quattro 1.8L 2004, Emission Check Valve by MTC®. Engineering each part from the very core allows MTC to offer its customers the very highest in automotive parts quality while remaining highly affordable. MTC is an industry...
      Highest quality products at the most competitive pricesProducts are produced to exceed OEM specifications and quality standards that MTC offer an industry leading
      $4.10
    • (0 reviews)
      # mpn1803911127
      Audi TT Quattro 3.2L 2004, EGR Vacuum Solenoid by Original Equipment®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste...
      High quality at an affordable priceExpertly made from premium materials
      $65.93
    • (0 reviews)
      # mpn4495526373
      Audi TT / TT Quattro 1.8L 2004, EGR Vacuum Solenoid by Pierburg®. N249. "Diesel" and "downsizing" are terms that largely account for the popularity of electropneumatic transducers, a prime mainstay of Pierburg's sales. These are devices...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $52.92
    • (0 reviews)
      # mpn1173242132
      Audi TT / TT Quattro 2004, Intermotor™ Secondary Air Injection Bypass Valve by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $153.71
    • (0 reviews)
      # mpn53630736
      Audi TT / TT Quattro 2004, Intermotor™ Secondary Air Injection Pump Check Valve by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $19.99
    • (0 reviews)
      # mpn1032497506
      Audi TT / TT Quattro 2004, Emission Check Valve by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make your exhaust...
      High quality plastic and/or steel constructionDirect replacement for a proper fit every time
      $4.49
    • (0 reviews)
      # mpn4495526475
      Audi TT 2004, Air Pump Check Valve by Pierburg®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $83.07
    • (0 reviews)
      # mpn4495526433
      Audi TT / TT Quattro 1.8L 2004, Intake System Vacuum Solenoid by Pierburg®. "Diesel" and "downsizing" are terms that largely account for the popularity of electropneumatic transducers, a prime mainstay of Pierburg's sales. These are...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $54.85
    • (1 review)
      # 354418530
      Audi TT 2004, Breather Hose by URO Parts®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas running out...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $11.59 - $20.55
    • (0 reviews)
      # mpn1032497543
      Audi TT / TT Quattro 1.8L 2004, T-Shaped PCV Housing by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make your...
      High quality plastic and/or steel constructionDirect replacement for a proper fit every time
      $7.61
    • (0 reviews)
      # mpn4476106275
      Audi TT AWP Engine 2004, PCV Valve Hose by Gates®. Emission Hose is constructed from high quality materials for durability and maximum service life. Replacement hose effectively restores the emission system to proper operation and...
      High quality at an affordable priceExpertly made from premium materials
      $28.15
    • (0 reviews)
      # 706849506
      Audi TT 2004, Breather Hose by Rein®. Air, breather, and vacuum hoses channel air and vapors and make sure your vacuum operated accessories can be properly actuated. Unfortunately, age and exposure to heat and the environment can cause...
      Direct fit, form, and functionEngineered to the highest OE standards
      $4.49 - $22.58
    • (0 reviews)
      # mpn4489688846
      Audi TT / TT Quattro AWP Engine 2004, Breather Hose Complete Kit by 034Motorsport®. Sold as a complete kit. Designed to replace the crumbling plastic and rubber factory breather hoses. This complete silicone hose kit with billet check...
      $189.92
    • (0 reviews)
      # mpn4489688824
      Audi TT / TT Quattro AWP Engine 2004, Crankcase Breather Hose by 034Motorsport®. Location: Lower Block. 1 Piece. Reinforced silicone 1.8T lower block breather hose to replace the crumbling factory plastic and rubber lower breather...
      24 Months WarrantyMade to provide unequaled quality and reliability
      $86.82
    • (0 reviews)
      # 750478171
      Audi TT 2004, Valve Cover Breather Hose by 034Motorsport®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
      $30.08 - $48.84
    • (0 reviews)
      # mpn4489688853
      Audi TT / TT Quattro 1.8L 2004, Valve Housing by 034Motorsport®. Location: Engine Breather Tubes To Bleeder Valve.
      $16.28
    • (0 reviews)
      # 380730351
      Audi TT Quattro 2004, Catalytic Converter Gasket by AJUSA®. If you need durable gaskets to prevent leaks on your vehicle, Ajusa is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $1.10 - $3.81
    • (0 reviews)
      # mpn4507285161
      Audi TT / TT Quattro 1.8L 2004, EGR Valve Gasket by Elring®. For professional repairs, place your trust in gaskets, gasket sets and service parts from Elring - the reliable and experienced supplier of spare parts to original equipment...
      Expertly Crafted from the highest grade materialsMade to provide maximum accuracy and dependability
      $1.71
    • (0 reviews)
      # mpn3772741642
      Audi TT / TT Quattro 1.8L 2004, Secondary Air Injection Pump Bushing by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $2.65
    • (0 reviews)
      # mpn1032497578
      Audi TT Quattro 3.2L 2004, Secondary Air Injection Pump Mount by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $9.40
    • (0 reviews)
      # mpn4481806368
      Audi TT Quattro 3.2L 2004, Secondary Air Injection Pump Mount by Aftermarket®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you...
      High quality at an affordable priceExpertly made from premium materials
      $3.45
    • (0 reviews)
      # mpn1708004
      Audi TT / TT Quattro 1.8L 2004, Secondary Air Injection Pump Rubber Mount by MTC®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $2.39
    • (0 reviews)
      # mpn2169838
      Audi TT / TT Quattro 1.8L 2004, Secondary Air Injection Pump Mount by Rein®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you...
      OE-quality replacement partsThe finest quality at a great price
      $5.55




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    • Replacement Emission Control Parts
      August 18, 2014
      Oxygen Sensors - Why Does My Car Have Four, And...
      An oxygen sensor (also known as an O2 sensor or Lambda sensor) is a sensor designed to generate a reading based on the content of oxygen in an automotive exhaust...
      by Michael Grayen
    • Ignition Parts
      August 10, 2014
      Auto Parts: Dealer vs. Aftermarket
      The question of whether to buy parts from an automotive dealer vs. ones from aftermarket manufacturers is as age-old as the automobile itself. Below, we'll take a look...
      by Timothy Zahl

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