1998 Audi A4 Emission Control

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    • (0 reviews)
      # 21073231
      Audi A4 / A4 Quattro 1998, 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
      $53.54 - $76.20
    • (0 reviews)
      # 45132244
      Audi A4 1998, 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 manufacturersThe finest quality at a great price
      $25.36 - $168.95
    • (0 reviews)
      # mpn1889682
      Audi A4 / A4 Quattro 2.8L 1998, 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...
      High quality at an affordable priceExpertly made from premium materials
      $256.84
    • (0 reviews)
      # 24139493
      Audi A4 / A4 Quattro 1998, 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...
      Up to 15 % savings in fuel costsReduced CO2 emissions
      $58.84 - $77.20
    • (0 reviews)
      # 24139519
      Audi A4 1998, Universal Fit Oxygen Sensor by Bosch®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $55.38
    • (0 reviews)
      # 22132064
      Audi A4 / A4 Quattro 1998, 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
      $67.05 - $104.64
    • (0 reviews)
      # 81757189
      Audi A4 / A4 Quattro 1998, 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 three inches of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $61.80 - $80.75
    • (0 reviews)
      # 48069790
      Audi A4 / A4 Quattro 1998, 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
      $43.71 - $54.57
    • (0 reviews)
      # mpn53630438
      Audi A4 / A4 Quattro 1.8L 1998, 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
      $12.77
    • (0 reviews)
      # 459000696
      Audi A4 1998, PCV Valve 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 needs and deliver great quality...
      High quality at an affordable priceExpertly made from premium materials
      $70.00 - $109.36
    • (0 reviews)
      # mpn1032497395
      Audi A4 / A4 Quattro 1.8L 1998, 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
      $9.54
    • (0 reviews)
      # mpn449442
      Audi A4 / A4 Quattro 1.8L 1998, 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
      $9.66
    • (0 reviews)
      # mpn1742067893
      Audi A4 / A4 Quattro 1.8L 1998, PCV Valve by Vaico®. Pressure Regulating Valve. Location: On Air Mass Meter Valve. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $19.26
    • (0 reviews)
      # mpn176015
      Audi A4 / A4 Quattro 1998, Vapor Canister 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 needs and...
      High quality at an affordable priceExpertly made from premium materials
      $282.75
    • (0 reviews)
      # 54147800
      Audi A4 / A4 Quattro 2.8L 1998, 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...
      High quality at an affordable priceExpertly made from premium materials
      $103.59 - $115.59
    • (0 reviews)
      # mpn3610113388
      Audi A4 / A4 Quattro 2.8L 1998, Secondary Air Injection Pump by Dorman®. Pulley Not Required. Keep your vehicle’s emission control system in top-notch condition with superior Dorman replacement emission control parts. Manufactured...
      Manufactured from premium grade materialsBuilt to provide exceptional OE quality and function
      $390.95
    • (0 reviews)
      # 507830936
      Audi A4 2.8L 1998, 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...
      50-state emissions street legalThe finest quality at a great price
      $123.91
    • (0 reviews)
      # 87065148
      Audi A4 1.8L Engine Family Number # WADXV01.8322 1998, CalCat™ Catalytic Converter by Walker®. Emissions: CARB compliant. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port....
      Designed to meet your vehicle’s specific emissions requirementsDirect fit replacement
      $364.94
    • (0 reviews)
      # 286175756
      Audi A4 2.8L Engine Family Number # WADXV02.8324 1998, 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
      $131.57 - $155.23
    • (0 reviews)
      # 286175728
      Audi A4 / A4 Quattro Base 1.8L 1998, 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...
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $262.83
    • (0 reviews)
      # 286175788
      Audi A4 1998, 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, the Right choice....
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $76.05 - $92.86
    • (0 reviews)
      # mpn1222577
      Audi A4 2.8L 1998, ECO II Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Position: Driver Side Undercar. Catalytic Converter Body Shape: Oval. Without O2 Sensor Ports. Catalytic Inlet...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $58.60
    • (0 reviews)
      # 100278960
      Audi A4 1998, 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...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $61.61 - $157.36
    • (0 reviews)
      # 128872949
      Audi A4 1998, 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...
      $74.51 - $89.97
    • (0 reviews)
      # 81674357
      Audi A4 1998, Catalytic Converter by AP Exhaust®. Converter Configuration: Direct Fit. Without Air Tube. The growing concern for the environment means there is a growing need for quality emission control products. AP catalysts and...
      $301.75 - $376.22
    • (0 reviews)
      # 621830127
      Audi A4 1998, Catalytic Converter by AP Exhaust®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Without Air Tube. Three-Way No / Air OBDII By Design US-EPA Compliant catalytic converters are efficient at the...
      $129.71 - $203.56
    • (0 reviews)
      # 88879792
      Audi A4 1998, 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 use...
      $190.68 - $343.32
    • (0 reviews)
      # 447196638
      Audi A4 1998, 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...
      $81.22 - $206.14
    • (0 reviews)
      # 81059097
      Audi A4 1998, 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 are made from a...
      Direct fitMade from a heavy duty stainless steel outer shell
      $269.89 - $359.86
    • (0 reviews)
      # mpn2231258678
      Audi A4 / A4 Quattro Base 1.8L 1998, Catalytic Converter by PaceSetter®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Front Undercar. If you want to get the most out of your vehicle, this PaceSetter product...
      $112.51
    • (0 reviews)
      # mpn2765260632
      Audi A4 / A4 Quattro 1.8L 1998, 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 1998, 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 1998, 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)
      # 35252805
      Audi A4 With TLEV Specification 1998, 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 needs...
      $470.03 - $587.89
    • (0 reviews)
      # 49708715
      Audi A4 With TLEV Specification 1998, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic...
      $180.93 - $231.40
    • (0 reviews)
      # mpn1125942
      Audi A4 / A4 Quattro 1.8L 1998, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. With Gaskets. Catalytic Converter Overall Length: 15.25". Includes: Gasket (2). If your car...
      $451.26
    • (0 reviews)
      # mpn1033605
      Audi A4 / A4 Quattro 1.8L 1998, 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
    • (1 review)
      # mpn64897
      Audi A4 / A4 Quattro 1.8L / 2.8L 1998, 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
      $19.27
    • (0 reviews)
      # mpn1889675
      Audi A4 / A4 Quattro 2.8L 1998, EGR Vacuum Solenoid 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...
      High quality at an affordable priceExpertly made from premium materials
      $68.06
    • (0 reviews)
      # 458920295
      Audi A4 / A4 Quattro 1998, 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
      $141.63 - $159.45
    • (0 reviews)
      # 354425290
      Audi A4 1998, 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 system work...
      High quality plastic and/or steel constructionDirect replacement for a proper fit every time
      $4.49 - $5.49
    • (0 reviews)
      # mpn769722420
      Audi A4 / A4 Quattro 1998, 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
      $10.41
    • (0 reviews)
      # 69857641
      Audi A4 / A4 Quattro 1998, 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
      $18.30 - $28.94
    • (0 reviews)
      # 507858923
      Audi A4 / A4 Quattro 1.8L 1998, PCV Hose 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 needs and...
      High quality at an affordable priceExpertly made from premium materials
      $29.96 - $42.37
    • (0 reviews)
      # 77557187
      Audi A4 1998, 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
      $26.72 - $29.39
    • (0 reviews)
      # mpn1032497543
      Audi A4 / A4 Quattro 1.8L 1998, 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)
      # 588463341
      Audi A4 / A4 Quattro 2.8L 1998, 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...
      High quality at an affordable priceExpertly made from premium materials
      $26.21 - $29.81
    • (0 reviews)
      # mpn1909768970
      Audi A4 / A4 Quattro 2.8L 1998, 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
      $18.92
    • (0 reviews)
      # mpn4476046605
      Audi A4 / A4 Quattro 1.8L 1998, 3-Way Engine Crankcase Breather Connector by Vaico®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $9.61
    • (0 reviews)
      # mpn1742067874
      Audi A4 / A4 Quattro 1.8L 1998, Breather Hose by Vaico®. Location: Between Breather Assembly And Valve Housing. If you have a dirty air filter, clogged PCV valve, or defective MAF sensor you may be tempted to just run down to the local...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $25.40
    • (0 reviews)
      # mpn26591839
      Audi A4 2.8L 1998, Secondary Air Injection Pump Hose by Genuine®. Location: To Pump. 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....
      High quality at an affordable priceExpertly made from premium materials
      $92.64
    • (0 reviews)
      # 545999298
      Audi A4 1.8L 1998, 3-Bolt Exhaust Gasket by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose...
      Makes installation quick and easyOptimal OE-style fit and quality
      $3.96 - $4.08
    • (0 reviews)
      # mpn1590772444
      Audi A4 / A4 Quattro 2.8L 1998, Catalytic Converter Gasket by Victor Reinz®. Flange Type. 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...
      High quality at an affordable priceExpertly made from premium materials
      $7.32
    • (0 reviews)
      # mpn1814676622
      Audi A4 / A4 Quattro 1.8L 1998, 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...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $1.10
    • (0 reviews)
      # mpn246468473
      Audi A4 / A4 Quattro 2.8L 1998, EGR Valve Gasket by Elring®. 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
      $3.12
    • (0 reviews)
      # mpn707257
      Audi A4 / A4 Quattro 2.8L 1998, Secondary Air Injection Pump Gasket by Victor Reinz®. 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....
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $3.23
    • (0 reviews)
      # mpn1556018439
      Audi A4 / A4 Quattro 2.8L 1998, Breather Hose by Rein®. Location: Connector To Intake Manifold Flange. Air, breather, and vacuum hoses channel air and vapors and make sure your vacuum operated accessories can be properly actuated....
      Direct fit, form, and functionEngineered to the highest OE standards
      $18.69
    • (1 review)
      # mpn1161516378
      Universal Baffled Oil Catch Can by Mishimoto®. The 6’ of black rubber hose allows you to easily splice the black nylon ball valve into the hose wherever works best for you! The included 3/8” to 3/8” hose barb black nylon ball...
      40-micron bronze filter blocks oil from depositing in ventilation systemSpecial engineered inlet pattern "turbulates" air longer, allowing oil to condense
      $47.25
    • (1 review)
      # 458979679
      Universal Compact Baffled Oil Catch Can by Mishimoto®. The Mishimoto Baffled Oil Catch Can is the most advanced oil catch can on the market. Every turbo system deserves to be complemented by a proper oil catch can setup, also known as...
      40-micron bronze filter blocks oil from depositing in ventilation systemSpecial engineered inlet pattern "turbulates" air longer, allowing oil to condense
      $116.25 - $127.50
    • (1 review)
      # 458954748
      Universal Oil Catch Can by Mishimoto®. The Mishimoto Baffled Oil Catch Can is the most advanced oil catch can on the market. Every turbo system deserves to be complemented by a proper oil catch can setup, also known as an air oil...
      40-micron bronze filter blocks oil from depositing in ventilation systemSpecial engineered inlet pattern "turbulates" air longer, allowing oil to condense
      $96.75 - $116.25




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