2009 Audi A4 Emission Control

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    • (0 reviews)
      # 710278086
      Audi A4 2009, 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
      $71.94 - $124.68
    • (0 reviews)
      # 485626270
      Audi A4 2009, 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
      $78.42 - $212.77
    • (0 reviews)
      # 21073379
      Audi A4 2009, 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
      $100.09 - $145.85
    • (0 reviews)
      # 22132140
      Audi A4 2009, 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
      $59.99 - $99.13
    • (0 reviews)
      # 476472876
      Audi A4 2009, 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 reputation for...
      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.
      $139.57 - $148.56
    • (0 reviews)
      # 517846060
      Audi A4 2009, 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
      $79.18 - $253.93
    • (0 reviews)
      # mpn53630558
      Audi A4 Quattro 2.0L 2009, TechSmart™ Engine Crankcase Vent 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $37.10
    • (0 reviews)
      # 24139727
      Audi A4 2009, Premium Oxygen Sensor by Bosch®. 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 that is equally...
      Up to 15 % savings in fuel costsReduced CO2 emissions
      $73.83 - $132.90
    • (0 reviews)
      # mpn937535
      Audi A4 / A4 Quattro 2.0L Gas 2009, 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...
      Patented SmartLink™ connector systemNo special tools required for installation
      $39.85
    • (0 reviews)
      # 24139733
      Audi A4 2009, 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
      $109.83 - $115.55
    • (0 reviews)
      # 152240734
      Audi A4 2009, 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
      $108.11 - $136.83
    • (0 reviews)
      # 81757249
      Audi A4 2.0L 2009, 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
      $86.89 - $106.71
    • (0 reviews)
      # mpn53630839
      Audi A4 / A4 Quattro 2.0L Gas 2009, TechSmart™ Engine Oil Separator 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
      $93.83
    • (0 reviews)
      # 563759500
      Audi A4 2009, 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 1950’s, brand...
      OE quality products from top original equipmentTop quality materials
      $48.95 - $66.07
    • (0 reviews)
      # mpn4515246056
      Audi A4 / A4 Quattro Cabriolet 2.0L 2009, Crankcase Ventilation Valve by Febi®. With gasket. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high...
      24 Months/24,000 Miles WarrantyThe finest quality at a great price
      $31.08
    • (0 reviews)
      # 211362120
      Audi A4 2.0L 2009, Ultra™ Catalytic Converter by Walker®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Front. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Walker is an OE...
      High precious metal load and high technology washcoat for premium performanceBody and pipe heat shields made of high quality materials for durability
      $290.86 - $379.21
    • (0 reviews)
      # mpn1252587
      Audi A4 / A4 Quattro 2.0L Gas 2009, ECO II Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Location: Undercar. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 17". If you need...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $211.23
    • (0 reviews)
      # mpn3001554805
      Audi A4 Quattro 2.0L 2009, Premium Load Catalytic Converter and Pipe Assembly by Bosal®. Emissions: EPA compliant. Converter Configuration: Direct Fit. If you’re in need of a replacement catalytic converter, you can’t do better than...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $197.96
    • (0 reviews)
      # 140268159
      Audi A4 2.0L 2009, Catalytic Converter by DEC®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Front. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail again....
      Direct fitMade from a heavy duty stainless steel outer shell
      $318.44 - $355.57
    • (0 reviews)
      # mpn1300969158
      Audi A4 / A4 Quattro Convertible 2.0L 2009, Catalytic Converter by Davico®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Center. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 17". This...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $249.01
    • (0 reviews)
      # 380751293
      Audi A4 Cabriolet 2009, Heavy Metal 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...
      $343.10 - $564.68
    • (0 reviews)
      # mpn1033611
      Audi A4 Quattro Cabriolet 2.0L 2009, 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....
      $100.27
    • (0 reviews)
      # 380751294
      Audi A4 2009, 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...
      $404.36 - $618.71
    • (0 reviews)
      # mpn1038302
      Audi A4 Quattro Cabriolet 2.0L 2009, 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....
      $122.43
    • (0 reviews)
      # mpn57775
      Audi A4 / A4 Quattro 2.0L CAEB Engine Gas 2009, PCV Valve Diaphragm by Dorman®. Keep your vehicle’s emission control system in top-notch condition with superior Dorman replacement emission control parts. Manufactured from top-grade...
      Manufactured from premium grade materialsBuilt to provide exceptional OE quality and function
      $18.79
    • (0 reviews)
      # 784263050
      Audi A4 2009, Crankcase Breather Hose by Vaico®. From Crankcase Vent Valve to Intake Manifold. Position: Front. Quality results from the consistent pursuit of an customer-focused strategy. Clients wishes are in the center of business....
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $28.13
    • (0 reviews)
      # 784263519
      Audi A4 2009, Crankcase Breather Oil Trap by Vaico®. Quality results from the consistent pursuit of an customer-focused strategy. Clients wishes are in the center of business. Vaico aim: the best quality for your satisfaction. As a...
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $73.11 - $157.12
    • (0 reviews)
      # 784262882
      Audi A4 2009, Oil Separator by Vaico®. Quality results from the consistent pursuit of an customer-focused strategy. Clients wishes are in the center of business. Vaico aim: the best quality for your satisfaction. As a result, many of...
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $64.62
    • (0 reviews)
      # mpn53630549
      Audi A4 Quattro 3.2L 2009, 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)
      # 34107147
      Audi A4 2009, 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 construction keeps the...
      Designed for enduring resistance to harsh road and weather conditionsDirect replacement for a proper fit every time
      $19.74
    • (0 reviews)
      # 939552588
      Audi A4 2009, Purge 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 great...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $41.74
    • (0 reviews)
      # mpn53630736
      Audi A4 2009, 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 prices and...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $19.99
    • (0 reviews)
      # mpn53630554
      Audi A4 / A4 Quattro 2.0L Gas 2009, TechSmart™ 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,...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $59.48
    • (0 reviews)
      # 939689230
      Audi A4 / A4 Quattro 2.0L BWT Engine Gas 2009, PCV Valve Hose by Dorman®. PCV Hoses allows crankcase pressure to escape the engine in a controlled manner. Plus, now with Dorman's PCV Valve Hoses you can replace just the hose, without...
      Constructed of high quality materials for long lasting useDirect replacement for a proper fit every time
      $17.04
    • (0 reviews)
      # 77558662
      Audi A4 2009, PCV Valve Hose with 90 Degree Connector by URO Parts®. Check Valve Hose. Location: From Pressure Regulator Valve. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $10.70
    • (0 reviews)
      # mpn4476106296
      Audi A4 / A4 Quattro 2.0L BWT Engine Gas 2009, 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...
      High quality at an affordable priceExpertly made from premium materials
      $16.09
    • (0 reviews)
      # 507803714
      Audi A4 / A4 Quattro 2.0L Gas 2009, 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...
      Direct fit, form, and functionEngineered to the highest OE standards
      $14.04 - $56.24
    • (0 reviews)
      # 97665228
      Audi A4 2009, Catalytic Converter Gasket by AJUSA®. Position: Outlet. 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...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $1.10 - $4.26
    • (0 reviews)
      # mpn4508899725
      Audi A4 Quattro 2.0L BWT Engine 2009, Catalytic Converter Gasket by Elring®. Location: Turbocharger Outlet. Is your car noisier these days? Can you smell exhaust fumes in the cabin? Exhaust system repairs should not be put off, both for...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $6.11
    • (0 reviews)
      # mpn1785603988
      Audi A4 / A4 Quattro Cabriolet 2.0L 2009, PCV Valve Seal 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
      $2.76
    • (0 reviews)
      # mpn4478342693
      Audi A4 / A4 Quattro 2009, Oil Separator 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 meet...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $13.35
    • (0 reviews)
      # mpn1969674096
      Audi A4 2.0L BWT Engine Gas 2009, PCV Valve Gasket by Elwis®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $5.52
    • (0 reviews)
      # 689545462
      Audi A4 Quattro 3.2L 2009, Vacuum Pump Gasket by Victor Reinz®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $6.61 - $9.61
    • (0 reviews)
      # 821273117
      Audi A4 2009, Crankcase Vent Valve by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using...
      Carefully crafted to provide optimum performanceMade from premium materials to last
      $58.48 - $189.64
    • (0 reviews)
      # 821259108
      Audi A4 2009, Oil Separator by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using...
      Carefully crafted to provide optimum performanceMade from premium materials to last
      $156.50 - $208.60
    • (0 reviews)
      # mpn4495482101
      Audi A4 / A4 Quattro Cabriolet 2009, Vapor Canister by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium...
      Carefully crafted to provide optimum performanceMade from premium materials to last
      $341.35
    • (0 reviews)
      # 1083716249
      Audi A4 2.0L 2009, Catalytic Converter by PaceSetter®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Front. If you want to get the most out of your vehicle, this PaceSetter product is second to none....
      Direct-Fit Catalytic Converters are a direct replacement for original equipmentManufactured using mandrel-bent 16-gauge and stainless steel tubing
      $188.43 - $215.28
    • (0 reviews)
      # mpn4483240518
      Audi A4 / A4 Quattro 2.0L CAEB Engine Gas 2009, Vapor Canister Purge Valve by Original Equipment®. Hose Assembly.
      High quality at an affordable priceExpertly made from premium materials
      $110.44
    • (0 reviews)
      # 821286120
      Audi A4 2009, Crankcase Breather Hose by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and manufactured from premium materials using...
      Carefully crafted to provide optimum performanceMade from premium materials to last
      $36.03 - $46.65
    • (0 reviews)
      # mpn4498313700
      Audi A4 / A4 Quattro Cabriolet 2.0L 2009, Engine Crankcase Breather Pipe by Genuine®. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and...
      Carefully crafted to provide optimum performanceMade from premium materials to last
      $71.11
    • (0 reviews)
      # mpn4414338223
      Audi A4 Quattro 3.2L CALA Engine 2009, Breather Hose 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $131.87
    • (0 reviews)
      # 1060538695
      Audi A4 2009, Oxygen Sensor by Aceon®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $26.50 - $33.56
    • (0 reviews)
      # mpn2655065313
      Audi A4 / A4 Quattro Cabriolet 2.0L 2009, PCV Valve Kit 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...
      OE quality products from top original equipmentTop quality materials
      $94.40
    • (0 reviews)
      # mpn1891550736
      Audi A4 / A4 Quattro 2.0L Gas 2009, ECO III Catalytic Converter and Pipe Assembly by Eastern®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Front. With 2 O2 Sensor Ports. Catalytic Converter Overall Length:...
      Direct OEM replacementDesigned with twice the amount of Rhodium to help keep the MIL off on vehicles with high mileage, low emissions, or higher than normal emissions
      $214.66
    • (0 reviews)
      # 232386336
      Audi A4 2.0L 2009, Catalytic Converter and Pipe Assembly by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Front. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 24". The growing...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $180.75
    • (0 reviews)
      # mpn1969674102
      Audi A4 / A4 Quattro CAEB Engine 2009, Oil Separator Gasket by Elwis®. On Valve Cover. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $12.46
    • (0 reviews)
      # 550603153
      Audi A4 2009, Vapor Canister Filter 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 your time and...
      High quality at an affordable priceExpertly made from premium materials
      $40.52
    • (0 reviews)
      # mpn1969674102
      Audi A4 / A4 Quattro 2.0L CAEB Engine Gas 2009, Engine Crankcase Vent Valve Seal by Elwis®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $12.46


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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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