2004 Audi A4 Emission Control Parts
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Kayser®PCV ValveAudi A4 1.8L 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$51.96 - $74.77 - URO Parts®New Engine Crankcase Vent ValveAudi A4 / A4 Quattro 3.0L Gas 2004, New Engine Crankcase Vent 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...Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation$36.96
- Dorman®OE Solutions™ Vapor Canister Purge ValveAudi A4 / A4 Quattro 2004, OE Solutions™ Vapor Canister Purge Valve by Dorman®. Location: Near Intake Manifold. Engineered for a perfect fit and plug-and-play installation, this vapor canister purge valve is a direct replacement for...Direct replacement - this vapor canister purge valve fits and functions like original equipment to ensure proper function of your vehicle's evaporative emissions systemQuality construction - manufactured from premium materials for a long service life$30.06
- Denso®Air Fuel Ratio SensorAudi A4 / A4 Quattro 2004, Air Fuel Ratio Sensor by Denso®. Position: Upstream. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products...Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies$135.94 - $162.87
- Standard®Intermotor™ Vapor Canister Purge SolenoidAudi A4 / A4 Quattro 2004, Intermotor™ Vapor Canister Purge Solenoid by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the...Made with precision and quality in mindDesigned to meet your specific needs$40.26 - $84.23
- NTK®Air Fuel Ratio SensorAudi A4 / A4 Quattro 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...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$110.11 - $127.39
- Gates®Engine Crankcase Vent ValveAudi A4 / A4 Quattro 1.8L 2004, Engine Crankcase Vent Valve by Gates®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$55.74
- Standard®TechSmart™ Engine Crankcase Vent ValveAudi A4 1.8L 2004, TechSmart™ Engine Crankcase Vent Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...Made with precision and quality in mindDesigned to meet your specific needs$37.05
- URO Parts®Emission Check ValveAudi A4 / A4 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$4.03 - $4.22
- Vaico®Secondary Air Injection Control ValveAudi A4 / A4 Quattro 1.8L AMB Engine 2004, Secondary Air Injection Control Valve by Vaico®. Designed utilizing the latest technology, this product by Vaico features premium quality and will perform better than advertised. Perfect for...Made with precision and quality in mindDesigned to meet your specific needs$14.73
- Standard®Intermotor™ Secondary Air Injection Bypass ValveAudi A4 / A4 Quattro 2004, Intermotor™ Secondary Air Injection Bypass Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and...Made with precision and quality in mindDesigned to meet your specific needs$121.11 - $213.05
- Standard®Intermotor™ Secondary Air Injection Pump Check ValveAudi A4 / A4 Quattro 2004, Intermotor™ Secondary Air Injection Pump Check Valve by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices...Made with precision and quality in mindDesigned to meet your specific needs$12.12
- Genuine®Leak Detection PumpAudi A4 2004, Leak Detection Pump 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...Made with precision and quality in mindDesigned to meet your specific needs$394.87 - $826.92
- URO Parts®Vapor Canister Purge ValveAudi A4 / A4 Quattro 2004, Vapor Canister Purge 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...Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation$23.10 - $29.13
- SKP®Vapor Canister Purge ValveAudi A4 2004, Vapor Canister Purge Valve by SKP®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in mind. It will meet your...Made with precision and quality in mindDesigned to meet your specific needs$20.46 - $28.39
- Pierburg®Purge ValveAudi A4 / A4 Quattro 3.0L Gas 2004, 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...24 Months/24,000 MilesMade to provide unequaled quality and reliability$61.24
- SKP®Engine Crankcase Breather HoseAudi A4 / A4 Quattro 1.8L 2004, Engine Crankcase Breather Hose by SKP®. 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....High quality at an affordable priceExpertly made from premium materials$5.85
- Genuine®Crankcase Breather HoseAudi A4 / A4 Quattro 2004, 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...Made with precision and quality in mindDesigned to meet your specific needs$12.26 - $127.77
- Genuine®PCV HoseAudi A4 1.8L 2004, PCV 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...Made with precision and quality in mindDesigned to meet your specific needs$72.32
- WVE®Oxygen Sensor RelayAudi A4 / A4 Quattro 2004, Oxygen Sensor Relay by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics and the engine to minimize...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$5.02
- URO Parts®Engine Crankcase Breather HoseAudi A4 / A4 Quattro 2004, Engine Crankcase Breather Hose by URO Parts®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Made with precision and quality in mindDesigned to meet your specific needs$8.71 - $31.66
- SKP®Engine Crankcase Breather ConnectorAudi A4 / A4 Quattro 1.8L 2004, Engine Crankcase Breather Connector by SKP®. 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...High quality at an affordable priceExpertly made from premium materials$5.02
- SKP®Engine Crankcase Breather PipeAudi A4 / A4 Quattro 1.8L 2004, Engine Crankcase Breather Pipe by SKP®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Made with precision and quality in mindDesigned to meet your specific needs$7.14
- Vaico®Breather HoseAudi A4 / A4 Quattro 1.8L 2004, Breather Hose by Vaico®. Designed utilizing the latest technology, this product by Vaico features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Made with precision and quality in mindDesigned to meet your specific needs$66.76 - $95.39
- Vaico®Crankcase Breather HoseAudi A4 1.8L 2004, Crankcase Breather Hose by Vaico®. 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 deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$15.32 - $21.99
- Vaico®Engine Crankcase Breather ConnectorAudi A4 / A4 Quattro 1.8L 2004, Engine Crankcase Breather Connector by Vaico®. Designed utilizing the latest technology, this product by Vaico features premium quality and will perform better than advertised. Perfect for your vehicle...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$15.26 - $25.91
- Kayser®Breather HoseAudi A4 / A4 Quattro 1.8L 2004, Breather Hose by Kayser®. Hose and Lines are the basis for functioning supply systems. Air, oil or fuel - reliable feeding needs to be ensured. Kayser produce fuel lines as well as ventilation lines for...High-grade design and construction built to last for yearsPerfect for use in high-speed environments$42.08 - $57.48
- Genuine®Secondary Air Injection Pump Rubber MountAudi A4 / A4 Quattro 2004, Secondary Air Injection Pump Rubber Mount 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...Made with precision and quality in mindDesigned to meet your specific needs$14.95
- URO Parts®Air Pump HoseAudi A4 / A4 Quattro 1.8L 2004, Air Pump Hose by URO Parts®. Location: Valve to Air Hose. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and...High quality at an affordable priceExpertly made from premium materials$16.11
- Mahle®Secondary Air Injection Pump GasketAudi A4 / A4 Quattro 2004, Secondary Air Injection Pump Gasket by Mahle®. This product is made of high-quality components to meet and exceed strict quality requirements. Designed using state-of-the-art technology and with customers in...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$3.95
Shop By Service Type
- Oxygen Sensor Replacement
- Air Pump Check and Diverter Valve Replacement
- Canister Purge Solenoid Replacement
- Air Pump Check Valve Replacement
- Positive Crankcase Ventilation (PCV) Valve Replacement
- Positive Crankcase Ventilation (PCV) Valve Hose Replacement
- Fuel Evaporative Canister Replacement
- Secondary Air Injection Hose Replacement
- Air Injection System Control Valve Replacement
- Secondary Air Injection System Air Bypass Valve Replacement
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2004 Audi A4 Models
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