2004 Subaru WRX Emission Control Parts
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TRQ®Oxygen SensorSubaru WRX / WRX STI 2.0L 2004, Oxygen Sensor by TRQ®. Position: Upstream. Location: Bank 1 Sensor 1. If your oxygen sensor fails, replace it with this top-grade part developed to easily fix the problem. Built to fit and function...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$70.25$73.95Save $3.70 (5%) - Dorman®OE Solutions™ Vapor CanisterSubaru WRX / WRX STI 2.0L 2004, OE Solutions™ Vapor Canister by Dorman®. This vapor canister has been made to match the original equipment evap canister on certain vehicle years, makes and models, properly restoring emissions...Direct replacement - this evaporative emissions charcoal canister matches the function and performance of the original canister on specified vehiclesRestores performance - properly repairs issues with emissions controls to clear check engine light and pass inspection$65.52
- Genuine®PCV ValveSubaru WRX / WRX STI 2004, PCV 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...Made with precision and quality in mindDesigned to meet your specific needs$56.61
- Denso®Oxygen SensorSubaru WRX 2004, Oxygen Sensor by Denso®. Position: Downstream. 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....High quality plastic and/or steel constructionDirect replacement for a proper fit every time$62.89
- TRQ®Downstream O2 Oxygen SensorSubaru WRX / WRX STI Base 2004, Downstream O2 Oxygen Sensor by TRQ®. TRQ oxygen sensors are manufactured to precise specifications using premium raw materials to optimize your vehicle’s emission system. Each sensor is...Intended to bring your vehicle back to its original gloryBudget-friendly alternative to the OEM part$38.90$40.95Save $2.05 (5%)
- Walker Products®Oxygen SensorSubaru WRX 2004, Oxygen Sensor by Walker Products®. 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$50.98 - $218.24
- Bosch®Premium Narrow-band Oxygen SensorSubaru WRX / WRX STI Standard Transmission 2004, Premium Narrow-band Oxygen Sensor by Bosch®. Position: Downstream. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up...OE Identical ConnectorCompact Design$64.53
- Walker Products®Premium Oxygen SensorSubaru WRX 2004, Premium Oxygen Sensor by Walker Products®. Position: Downstream. Location: B1S2 Sensor. Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet or exceed all original equipment...Improved Engine Response & PerformanceLower Emissions$60.09
- Spectra Premium®Oxygen SensorSubaru WRX 2004, Oxygen Sensor by Spectra Premium®. Position: Downstream. To ensure your vehicle has optimal performance and fuel economy while producing minimal emissions replace a defective O2 sensor with one backed by the...Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements$57.53
- NTK®Oxygen SensorSubaru WRX 2004, Oxygen Sensor by NTK®. Position: Downstream. Location: B1S2. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$69.51
- ACDelco®Gold™ PCV ValveSubaru WRX Base 2004, Gold™ PCV Valve by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$6.12
- WVE®Vapor CanisterSubaru WRX STI 2.5L 2004, Vapor Canister 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 emissions...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$137.60
- Bosch®Premium Wideband Oxygen SensorSubaru WRX 2004, Premium 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$198.06 - $262.80
- Genuine®Lambda Temperature SensorSubaru WRX Base 2004, Lambda Temperature Sensor by Genuine®. Position: Front. 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...OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price$188.86
- Bosch®Universal Fit Narrow-band Oxygen SensorSubaru WRX / WRX STI 2004, Universal Fit Narrow-band 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...Patented SmartLink™ connector systemNo special tools required for installation$47.85
- Delphi®Oxygen SensorSubaru WRX 2004, 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...Resists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long lifePatented sensors construction and design$73.45 - $242.96
- Denso®Air Fuel Ratio SensorSubaru WRX 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 by...Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies$150.32 - $202.63
- Genuine®Vapor Canister Purge ValveSubaru WRX 2004, Vapor Canister Purge Valve by Genuine®. Location: Next to Intake Manifold. Genuine is here to give you the ultimate in quality and reliability at a cost you can afford. Designed utilizing the latest technologies and...Made with precision and quality in mindDesigned to meet your specific needs$52.66
- Dorman®OE Solutions™ Vapor Canister Vent ValveSubaru WRX 2004, OE Solutions™ Vapor Canister Vent Valve by Dorman®. A malfunctioning vapor canister vent can cause the engine light to come on. This replacement valve is engineered of quality materials for durability to ensure proper...Direct replacement - this vapor canister vent valve fits and functions like the original partQuality construction - manufactured from premium materials for a long service life$52.20
- Dorman®OE Solutions™ Vapor Canister Purge ValveSubaru WRX 2004, OE Solutions™ Vapor Canister Purge Valve by Dorman®. Engineered for a perfect fit and plug-and-play installation, this vapor canister purge valve is a direct replacement for the original equipment purge valve. It is...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$115.99
- Standard®Intermotor™ Vapor Canister Purge SolenoidSubaru WRX 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 highest...Made with precision and quality in mindDesigned to meet your specific needs$114.34 - $118.67
- WVE®Vapor Canister Vent SolenoidSubaru WRX 2004, Vapor Canister Vent 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 the engine to minimize...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$72.70
- Genuine®EGR Valve Vacuum ModulatorSubaru WRX 2004, EGR Valve Vacuum Modulator 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...Made with precision and quality in mindDesigned to meet your specific needs$173.08 - $283.76
- WVE®Vapor Canister Purge SolenoidSubaru WRX 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 the engine to minimize...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$95.99 - $184.59
- Standard®Intermotor™ Vapor Canister Vent SolenoidSubaru WRX / WRX STI Base 2004, Intermotor™ Vapor Canister Vent Solenoid 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$57.21
- Walker Products®Premium Air Fuel Ratio SensorSubaru WRX 2004, Premium Air Fuel Ratio Sensor by Walker Products®. Position: Upstream. Location: B1S1 Sensor. Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet or exceed all original...Designed to meet or exceed OE specifications in form, fit and functionGlobal coverage for import and/or domestic applications$139.71 - $187.83
- Genuine®Exhaust Gas Temperature SensorSubaru WRX 2004, Exhaust Gas Temperature Sensor 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$201.24
- Genuine®PCV Valve HoseSubaru WRX 2004, PCV Valve 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$10.58 - $53.60
- AP Exhaust®Direct Fit Catalytic Converter and Pipe AssemblySubaru WRX STI 2.5L 2004, Catalytic Converter and Pipe Assembly by AP Exhaust®. Converter Configuration: Direct Fit. Without Air Tube. Today’s exhaust performance market continues to cover a broad spectrum of vehicles. The unique...$411.24 - $412.51
- MagnaFlow®Heavy Metal Universal Fit Catalytic ConverterSubaru WRX 2004, Heavy Metal Catalytic Converter by MagnaFlow®. Converter Configuration: Universal Fit. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". If your car needs a new...$172.00 - $178.00
Shop By Service Type
- EGR Valve Replacement
- EGR Vacuum Modulator Replacement
- Oxygen Sensor Replacement
- EGR Temperature Sensor Replacement
- Evaporation Vent Solenoid Replacement
- Positive Crankcase Ventilation (PCV) Valve Hose Replacement
- Canister Purge Solenoid Replacement
- Positive Crankcase Ventilation (PCV) Valve Replacement
- Fuel Evaporative Canister Replacement
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