2004 Audi A4 Emission Control Parts
Select Your Submodel
-
TruParts®Service Tech EGR ValveAudi A4 / A4 Quattro 1.8L 2004, Service Tech EGR Valve by TruParts®. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in compliance with...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$56.81 - Dorman®OE Solutions™ Secondary Air Injection Check ValveAudi A4 / A4 Quattro 3.0L Gas 2004, OE Solutions™ Secondary Air Injection Check Valve by Dorman®. This secondary air injection check valve is designed to match the fit and function of the original valve on specified vehicles, and is...Direct replacement - this secondary air injection check valve is designed to match the fit and function of the original valve on specified vehiclesRestores functionality - this valve is made to fit and fully restore part functionality after the original valve fails$223.62 - $232.52
- WVE®Non-Catalytic Converter Mounted Secondary Air Injection Pump Check ValveAudi A4 / A4 Quattro 2004, Non-Catalytic Converter Mounted Secondary Air Injection Pump Check Valve by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system,...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$14.67
- WVE®Evaporative Emissions System Leak Detection PumpAudi A4 / A4 Quattro 2004, Evaporative Emissions System Leak Detection Pump by WVE®. WVE emissions products are made to meet or exceed vehicle manufacturer specifications to work in concert with the fuel system, underhood electronics...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$362.26
- WVE®Vapor Canister Purge SolenoidAudi A4 / A4 Quattro 1.8L / 3.0L Gas 2004, Vapor Canister Purge Solenoid 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...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$30.13
- GPD®Vapor Canister Purge SolenoidAudi A4 / A4 Quattro 1.8L / 3.0L Gas 2004, Vapor Canister Purge Solenoid by GPD®. The vapor canister purge valve/solenoid controls the amount of fuel vapor purged from the charcoal canister to the engine, preventing excess fuel vapor...Designed to meet/exceed OE fit, form, and functionDurability tested on every new design$96.80
- Vemo®Driver Side Cylinder Bank Secondary Air Injection Pump Check ValveAudi A4 3.0L 2004, Driver Side Cylinder Bank Secondary Air Injection Pump Check Valve by Vemo®. Grade: Aftermarket. Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$265.70
- ReplacementSecondary Air Injection Pump Check ValveAudi A4 2004, Secondary Air Injection Pump Check Valve by Replacement. 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, this product by...Expertly crafted from premium materialsDesigned to match rigorous quality standardsCall for Pricing
- Standard®Intermotor™ Fuel Vapor Leak Detection PumpAudi A4 / A4 Quattro 2004, Intermotor™ Fuel Vapor Leak Detection Pump 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$183.21
- Original Equipment®Vapor Canister FilterAudi A4 / A4 Quattro 2004, Vapor Canister Filter by Original Equipment®. Looking for high-quality replacement parts to restore the performance of your vehicle? Then Original Equipment automotive parts are for you. They are manufactured...Perfect replacement for your damaged or worn out original partMade using high-grade materials for long-lasting dependability$36.63
- URO Parts®Breather Hose Retainer ClipAudi A4 / A4 Quattro 1.8L 2004, Breather Hose Retainer Clip 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$7.71
- URO Parts®Engine Crankcase PlugAudi A4 / A4 Quattro 1.8L 2004, Engine Crankcase Plug 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$11.43
- SKP®PCV Valve HoseAudi A4 / A4 Quattro 3.0L Gas 2004, PCV Valve 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$124.89
- 034Motorsport®Breather Hose Complete KitAudi A4 / A4 Quattro 1.8L 2004, Breather Hose Complete Kit by 034Motorsport®. Sold as a complete kit. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...24 Months WarrantyMade to provide unequaled quality and reliability$205.93
- 034Motorsport®Valve Cover Breather HoseAudi A4 / A4 Quattro 1.8L 2004, Valve Cover Breather Hose by 034Motorsport®. Tube From Valve Cover to Intake Boot This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology...High quality at an affordable priceExpertly made from premium materials$27.06
- TruParts®Engine Crankcase Breather HoseAudi A4 / A4 Quattro 2004, Engine Crankcase Breather Hose by TruParts®. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in compliance...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$7.40 - $190.96
- Aftermarket®Secondary Air Injection Pump MountAudi A4 / A4 Quattro 2004, Secondary Air Injection Pump Mount by Aftermarket®. 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...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$3.10
- CATCO®Direct Fit Catalytic Converter and Pipe AssemblyAudi A4 Quattro 3.0L Gas Transmission with California Emission / Federal Emission 2004, Catalytic Converter and Pipe Assembly by CATCO®. Converter Configuration: Direct Fit. Position: Driver Side. With 2 O2 Sensor Ports. Catalytic...$754.12
- AP Exhaust®Direct Fit Catalytic Converter and Pipe AssemblyAudi A4 Quattro 3.0L Gas Transmission with California Emission / Federal Emission 2004, Catalytic Converter and Pipe Assembly by AP Exhaust®. Converter Configuration: Direct Fit. Position: Driver Side. With 2 O2 Sensor Ports. Catalytic...$603.69
- Walker®CalCat™ Direct Fit Round Body Catalytic ConverterAudi A4 1.8L Engine Family # 4ADXV01.8342 2004, CalCat™ Catalytic Converter by Walker®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length:...$917.62
- Torxe™Direct Fit Catalytic ConverterAudi A4 1.8L 2004, Catalytic Converter by Torxe™. Converter Configuration: Direct Fit. Direct Fit Catalytic converter by Torxe. Replace your clogged, corroded, and malfunctioning catalytic converter for the best possible price with a...$147.50
- Eastern Catalytic®ECO III Direct Fit Catalytic ConverterAudi A4 / A4 Quattro 1.8L 2004, ECO III Catalytic Converter by Eastern Catalytic®. Converter Configuration: Direct Fit. Location: Undercar. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 18". If you need to replace your...$510.31
- Eastern Catalytic®ECO III Direct Fit Catalytic Converter and Pipe AssemblyAudi A4 Quattro 3.0L Gas Transmission 2004, ECO III Catalytic Converter and Pipe Assembly by Eastern Catalytic®. Converter Configuration: Direct Fit. Position: Passenger Side. Location: Undercar. With 2 O2 Sensor Ports. Catalytic Outlet...$453.35
- Eastern Catalytic®ECO II Direct Fit Catalytic Converter and Pipe AssemblyAudi A4 Quattro 3.0L Gas 2004, ECO II Catalytic Converter and Pipe Assembly by Eastern Catalytic®. Converter Configuration: Direct Fit. Location: Undercar. With 2 O2 Sensor Ports. If you need to replace your failed or damaged catalytic...$523.83 - $593.46
- BRExhaust®Direct Fit Catalytic Converter and Pipe AssemblyAudi A4 Quattro 3.0L Gas Transmission Manufactured Before December with Federal Emission 2004, Catalytic Converter and Pipe Assembly by BRExhaust®. Converter Configuration: Direct Fit. Position: Driver Side. With 2 O2 Sensor Ports. If...$436.70
- Vemo®Catalytic Converter GasketAudi A4 / A4 Quattro 3.0L Gas 2004, Catalytic Converter Gasket by Vemo®. Location: Header Pipe. 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...High quality at an affordable priceExpertly made from premium materials$5.78
- DIY Solutions®Direct Fit Catalytic Converter and Pipe AssemblyAudi A4 Quattro 3.0L Gas Transmission 2004, Catalytic Converter and Pipe Assembly by DIY Solutions®. Converter Configuration: Direct Fit. Position: Front. If you're seeking to get your steel stallion back to its tip-top condition, then...$617.05
- BRExhaust®Premium Load Direct Fit Catalytic ConverterAudi A4 1.8L with Federal Emission 2004, Premium Load Catalytic Converter by BRExhaust®. Converter Configuration: Direct Fit. With 2 O2 Sensor Ports. If you’re in need of a replacement catalytic converter, you can’t do better than...$686.94
- ACAT Global®Direct Fit Catalytic ConverterAudi A4 2004, Catalytic Converter by ACAT Global®. Converter Configuration: Direct Fit. With O2 Sensor Port. This product features the elaborate design that was engineered with superior precision and refined to the last detail. Made...$122.03 - $197.42
- ACAT Global®High Performance Universal Fit Catalytic ConverterAudi A4 3.0L Gas 2004, High Performance Catalytic Converter by ACAT Global®. Converter Configuration: Universal Fit. This product features the elaborate design that was engineered with superior precision and refined to the last detail....$171.50 - $173.95
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
Popular Products
- $157.56 - $917.62
- $22.64 - $24.06
- $16.97
2004 Audi A4 Models
Popular Searches