1999 Audi A4 Emission Control

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    • (0 reviews)
      # 21073231
      Audi A4 / A4 Quattro 1999, 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...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $53.70 - $76.46
    • (0 reviews)
      # mpn1741925475
      Audi A4 1999, 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.
      $181.11
    • (0 reviews)
      # 710331106
      Audi A4 / A4 Quattro 1999, Universal Fit 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...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $59.75 - $61.06
    • (0 reviews)
      # 24139524
      Audi A4 1999, 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
      $59.15 - $77.44
    • (0 reviews)
      # 405163120
      Audi A4 1999, Universal Fit Oxygen Sensor by Bosch®. 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 harnesses. Properly...
      Patented SmartLink™ connector systemNo special tools required for installation
      $54.56
    • (0 reviews)
      # 22132072
      Audi A4 / A4 Quattro 1999, 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...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $60.77 - $85.02
    • (0 reviews)
      # 81757194
      Audi A4 / A4 Quattro 1999, 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...
      OE connectors and wire lengths within 3" of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $67.22 - $80.75
    • (0 reviews)
      # 48069798
      Audi A4 / A4 Quattro 1999, 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...
      Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements
      $42.39 - $52.23
    • (0 reviews)
      # mpn53630438
      Audi A4 / A4 Quattro 1.8L 1999, Intermotor™ PCV Valve by Standard®. No Connector. 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
      $12.30
    • (0 reviews)
      # mpn2294890
      Audi A4 / A4 Quattro 1.8L / 2.8L 1999, PCV Valve by Dorman®. Standard Replacement. The PCV Valve is a major component of the PCV System. Designed from high-quality materials for sustained reliability, Dorman's PCV Valve provides a...
      Direct replacement for a proper fitSave time and money by replacing failed valve, instead of the entire assembly
      $33.95
    • (0 reviews)
      # mpn1032497395
      Audi A4 / A4 Quattro 1.8L 1999, 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...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $6.40
    • (0 reviews)
      # mpn449442
      Audi A4 / A4 Quattro 1.8L 1999, 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
      $9.68
    • (0 reviews)
      # mpn3610113388
      Audi A4 / A4 Quattro 2.8L 1999, Secondary Air Injection Pump by Dorman®. Pulley Not Required. 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...
      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
    • (0 reviews)
      # mpn8385
      Audi A4 / A4 Quattro 2.8L 1999, 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...
      50-state emissions street legal100% testing of all units guarantees reliable performance every time.
      $111.02
    • (0 reviews)
      # 824125696
      Audi A4 / A4 Quattro 1999, 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...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $287.21
    • (0 reviews)
      # 87065150
      Audi A4 1.8L Engine Family # XADXV01.8322 1999, CalCat™ Catalytic Converter by Walker®. Emissions: CARB compliant. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port....
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $361.93
    • (0 reviews)
      # 286175851
      Audi A4 2.8L Engine Family # XADXV02.8324 1999, CalCat™ Catalytic Converter by Walker®. Emissions: CARB compliant. Converter Configuration: Universal Fit. With 1 Inlet. Without Air Tube. Specifically designed to comply with the...
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $125.48 - $146.90
    • (0 reviews)
      # 150671961
      Audi A4 1.8L 1999, Ultra™ Catalytic Converter by Walker®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length:...
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $259.03
    • (0 reviews)
      # 286175857
      Audi A4 / A4 Quattro Base 1.8L 1999, Ultra™ Catalytic Converter by Walker®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. Without Air Tube. The Right converter,...
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $74.65 - $87.82
    • (0 reviews)
      # 100278965
      Audi A4 2.8L 1999, Catalytic Converter by Eastern®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Catalytic Converter Overall Length: 14". Whether your catalytic converter is damaged by road debris or...
      Converts harmful engine emissions to less dangerous gases and water vaporAdvanced design for maximum engine output
      $58.55 - $159.23
    • (0 reviews)
      # 286175875
      Audi A4 1999, Catalytic Converter by Eastern®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Catalytic Converter Overall Length: 14". Whether your catalytic converter is damaged by road debris or failed...
      Converts harmful engine emissions to less dangerous gases and water vaporAdvanced design for maximum engine output
      $61.56 - $150.96
    • (0 reviews)
      # 81395947
      Audi A4 1999, 608 Series Catalytic Converter by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Without Air Tube. Catalytic Inlet Diameter: 2". Catalytic Outlet Diameter: 2". Three-Way No / Air OBDII By...
      A multitude of Universal converter bodies provided for maximum coverageProvides professional installer with immediate installation options
      $78.25 - $96.31
    • (0 reviews)
      # 80124558
      Audi A4 1.8L 1999, Catalytic Converter by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Without Air Tube. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 17". The growing concern for the...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $336.03
    • (0 reviews)
      # 842122639
      Audi A4 2.8L 1999, Catalytic Converter and Pipe Assembly by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Without Air Tube. The growing concern for the environment means there is a growing need for quality...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $352.84 - $354.35
    • (0 reviews)
      # 842083630
      Audi A4 1.8L 1999, Catalytic Converter by Bosal®. Converter Configuration: Direct Fit. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and...
      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
      $187.64 - $263.75
    • (0 reviews)
      # 88879808
      Audi A4 2.8L 1999, Catalytic Converter and Pipe Assembly by Bosal®. Converter Configuration: Direct Fit. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle...
      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
      $250.16 - $337.84
    • (0 reviews)
      # 447212609
      Audi A4 1999, Catalytic Converter by Bosal®. Converter Configuration: Universal Fit. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and...
      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
      $79.93 - $202.86
    • (0 reviews)
      # 517377858
      Audi A4 / A4 Quattro 1.8L 1999, Catalytic Converter by DEC®. Converter Configuration: Direct Fit. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail again. These catalytic converters...
      Direct fitMade from a heavy duty stainless steel outer shell
      $269.89 - $309.88
    • (0 reviews)
      # 842233643
      Audi A4 / A4 Quattro 2.8L 1999, Catalytic Converter and Pipe Assembly by DEC®. Converter Configuration: Direct Fit. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail again. These...
      Direct fitMade from a heavy duty stainless steel outer shell
      $327.01 - $359.86
    • (0 reviews)
      # 136720911
      Audi A4 1.8L 1999, Catalytic Converter by PaceSetter®. Converter Configuration: Direct Fit. If you want to get the most out of your vehicle, this PaceSetter product is second to none. Engineered with meticulous attention to detail, it...
      Direct-Fit Catalytic Converters are a direct replacement for original equipmentManufactured using mandrel-bent 16-gauge and stainless steel tubing
      $112.51 - $461.66
    • (0 reviews)
      # 286175810
      Audi A4 1.8L 1999, Catalytic Converter by Davico®. Converter Configuration: Direct Fit. Catalytic Converter Overall Length: 16.75". This direct-fit catalytic converter by Davico will be a great solution to replace your failed or damaged...
      $120.49 - $396.06
    • (0 reviews)
      # 842089654
      Audi A4 2.8L 1999, Catalytic Converter and Pipe Assembly by Davico®. Converter Configuration: Direct Fit. This direct-fit catalytic converter by Davico will be a great solution to replace your failed or damaged catalytic converter. Once...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $221.79 - $405.18
    • (0 reviews)
      # 898870006
      Audi A4 with PC Weight Class with California Emission with TLEV Standard 1999, Catalytic Converter by Davico®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Position: Center. This Universal fit catalytic converter...
      $246.05
    • (0 reviews)
      # mpn2765260632
      Audi A4 / A4 Quattro 1.8L 1999, Standard Grade Catalytic Converter by Flowmaster®. Emissions: EPA compliant. Converter Configuration: Direct Fit. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 17". Flowmaster's Standard...
      $365.74
    • (1 review)
      # 98135258
      Audi A4 / A4 Quattro 1999, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. With Pre and Post-Cat O2 Sensor Ports. If your car needs replacement, install one that will get you...
      $362.13 - $470.03
    • (0 reviews)
      # 98374711
      Audi A4 / A4 Quattro 1999, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Catalytic Inlet Diameter: 2". Catalytic...
      $100.27 - $110.08
    • (0 reviews)
      # 22199319
      Audi A4 / A4 Quattro with TLEV Standard 1999, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Direct Fit. With Gasket. Without Air Tube. With Pre and Post-Cat O2 Sensor Ports. If your car...
      $470.03 - $587.89
    • (0 reviews)
      # 22279699
      Audi A4 / A4 Quattro with TLEV Standard 1999, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port....
      $180.93 - $231.40
    • (0 reviews)
      # mpn1125942
      Audi A4 / A4 Quattro 1.8L 1999, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. With Gaskets. Catalytic Converter Overall Length: 15.25". If your car needs replacement, install...
      $451.26
    • (0 reviews)
      # mpn1033605
      Audi A4 / A4 Quattro 1.8L 1999, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without Air Tube. With Post-Cat O2 Sensor Port....
      $132.23
    • (0 reviews)
      # 784264159
      Audi A4 1999, Crankcase Breather Hose 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,...
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $13.04 - $17.32
    • (0 reviews)
      # mpn4494287449
      Audi A4 / A4 Quattro 2.8L 1999, Cylinder Head Cover Breather Hose by Vaico®. Pump to Valve. Quality results from the consistent pursuit of an customer-focused strategy. Clients wishes are in the center of business. Vaico aim: the best...
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $30.20
    • (0 reviews)
      # mpn4489688830
      Audi A4 / A4 Quattro 1.8L 1999, Engine Breather Housing Bleeder Valve 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...
      $37.98
    • (0 reviews)
      # 45132244
      Audi A4 / A4 Quattro 1999, 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
      $35.55 - $63.99
    • (1 review)
      # mpn64897
      Audi A4 / A4 Quattro 1.8L / 2.8L 1999, 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
      $19.87
    • (0 reviews)
      # mpn4494250757
      Audi A4 / A4 Quattro 1.8L 1999, 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
      $4.08
    • (0 reviews)
      # 97165507
      Audi A4 1999, 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 prices and the...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $143.03 - $152.64
    • (0 reviews)
      # mpn3610118459
      Audi A4 / A4 Quattro 2.8L 1999, Secondary Air Injection Check Valve by Dorman®. Position: Driver Side. Keep your vehicle’s emission control system in top-notch condition with superior Dorman replacement emission control parts....
      Manufactured from premium grade materialsBuilt to provide exceptional OE quality and function
      $110.73
    • (0 reviews)
      # 354425441
      Audi A4 / A4 Quattro 1999, 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
      $2.69 - $3.29
    • (0 reviews)
      # 824126215
      Audi A4 / A4 Quattro 2.8L 1999, 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...
      24 Months/24,000 MilesMade to provide unequaled quality and reliability
      $79.49 - $91.57
    • (0 reviews)
      # mpn4495526433
      Audi A4 / A4 Quattro 2.8L 1999, 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
      $55.81
    • (0 reviews)
      # mpn769722420
      Audi A4 / A4 Quattro 1999, PCV Valve Elbow by Dorman®. Provide an airtight seal between PCV hoses and prevent vacuum leaks with Dorman's resilient PCV Elbows. Made from nylon, rubber or plastic, the elbows are durable against...
      Made from oil-resistant materialsEasy to install just press into place
      $11.28
    • (0 reviews)
      # 69857641
      Audi A4 / A4 Quattro 1999, PCV Valve Hose by Dorman®. Location: Engine Breather Hose. 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...
      Constructed of high quality materials for long lasting useDirect replacement for a proper fit every time
      $20.18 - $31.91
    • (1 review)
      # 136384477
      Audi A4 1999, 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
      $7.77 - $21.24
    • (0 reviews)
      # mpn1032497543
      Audi A4 / A4 Quattro 1.8L 1999, 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
      $4.57
    • (0 reviews)
      # 509196391
      Audi A4 / A4 Quattro 1999, 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
      $24.49 - $50.72
    • (0 reviews)
      # 588471251
      Audi A4 1.8L 1999, PCV Breather Hose by Aftermarket®. Location: Intake Manifold to Suction Pump. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of...
      High quality at an affordable priceExpertly made from premium materials
      $6.12
    • (0 reviews)
      # mpn1909768970
      Audi A4 / A4 Quattro 2.8L 1999, Breather Hose by Meyle®. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $19.58
    • (0 reviews)
      # 706850507
      Audi A4 / A4 Quattro 1999, 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
      $4.49 - $18.69
    • (0 reviews)
      # 990523885
      Audi A4 1999, Crankcase Ventilation Hose by Febi®. 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...
      24 Months/24,000 MilesThe finest quality at a great price
      $15.65 - $18.45




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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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