2004 Subaru Legacy Emission Control Parts
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TRQ®Oxygen SensorSubaru Legacy EJ259 Engine 2004, Oxygen Sensor by TRQ®. Position: Upstream. If your oxygen sensor fails, replace it with this top-grade part developed to easily fix the problem. Built to fit and function exactly as the part it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$71.95Save: $3.60 (5%)$68.35 - WVE®EGR ValveSubaru Legacy 2.5L 2004, EGR Valve 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 of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$205.77
- Standard®T Series PCV ValveSubaru Legacy 2.5L 2004, T Series PCV 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 reputation for...Made with precision and quality in mindDesigned to meet your specific needs$12.19
- Beck Arnley®PCV ValveSubaru Legacy 2.5L 2004, PCV Valve by Beck Arnley®. Make sure your vehicle’s emission control system performs at its optimum level with top-of-the-line Beck Arnley replacement emission control parts. Designed to match OE (original...Designed to ensure reliable operation of your emission control systemDirect OE (original equipment) replacement$11.83
- Denso®Oxygen SensorSubaru Legacy 2.5L 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...High quality plastic and/or steel constructionDirect replacement for a proper fit every time$62.36 - $76.98
- TRQ®O2 Oxygen SensorSubaru Legacy 2004, 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 isostatically-pressed for improved...Intended to bring your vehicle back to its original gloryBudget-friendly alternative to the OEM part$35.95 - $56.95Save: up to 5%$34.15 - $55.24
- Walker Products®Oxygen SensorSubaru Legacy 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 - $212.11
- Bosch®Premium Narrow-band Oxygen SensorSubaru Legacy 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 your vehicle with an Oxygen...OE Identical ConnectorCompact Design$70.20 - $79.12
- NTK®Oxygen SensorSubaru Legacy 2.5L 2004, Oxygen Sensor by NTK®. Position: Downstream. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor element then...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$67.26 - $77.36
- Walker Products®Premium Oxygen SensorSubaru Legacy 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 - $65.86
- Spectra Premium®Oxygen SensorSubaru Legacy 2.5L 2004, 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$17.74 - $120.46
- ACDelco®Gold™ PCV ValveSubaru Legacy 2.5L 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$6.97Save: $1.03 (15%)$5.94
- Bosch®Premium Wideband Oxygen SensorSubaru Legacy 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...Detects the exact amount of unburned fuel in the exhaust streamOE connectors and OE-style harness for continuous wire from connector to sensor$200.99 - $245.64
- Denso®Universal Fit Oxygen SensorSubaru Legacy 2.5L Canada Built with Federal Emission 2004, Universal Fit Oxygen Sensor by Denso®. Position: Downstream. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The...Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants$42.11
- Dorman®New Help™ PCV ValveSubaru Legacy 2.5L 2004, New Help™ PCV Valve by Dorman®. Standard Replacement. Keep your vehicle’s emission control system in top-notch condition with superior Dorman replacement emission control parts. Manufactured from top-grade...Application specific - components designed to replace original components on certain vehiclesDurable materials - made to resist fluctuating under-hood temperatures to ensure longevity$12.53
- Standard®Intermotor™ PCV ValveSubaru Legacy 2.5L 2004, Intermotor™ PCV 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 reputation for...Made with precision and quality in mindDesigned to meet your specific needs$15.84
- WVE®PCV ValveSubaru Legacy 2.5L 2004, PCV Valve 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 of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$13.24
- Standard®Intermotor™ Vapor CanisterSubaru Legacy 2004, Intermotor™ Vapor Canister by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for...Made with precision and quality in mindDesigned to meet your specific needs$309.15
- Bosch®Universal Fit Narrow-band Oxygen SensorSubaru Legacy EJ253 Engine / EJ259 Engine 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...Patented SmartLink™ connector systemNo special tools required for installation$47.85
- Delphi®Oxygen SensorSubaru Legacy 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 - $208.22
- WVE®Vapor CanisterSubaru Legacy 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 of...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$137.60
- Genuine®EGR ValveSubaru Legacy 2004, EGR 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$319.10
- Standard®Intermotor™ EGR ValveSubaru Legacy 2004, Intermotor™ EGR 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 reputation for...Made with precision and quality in mindDesigned to meet your specific needs$175.56
- Denso®Air Fuel Ratio SensorSubaru Legacy 2.5L 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...Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies$144.40 - $167.82
- Dorman®OE Solutions™ Vapor Canister Purge ValveSubaru Legacy 2.5L 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....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$90.81
- NTK®Air Fuel Ratio SensorSubaru Legacy 2.5L 2004, Air Fuel Ratio Sensor by NTK®. Position: Upstream. 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...Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement$121.47 - $237.30
- Standard®Intermotor™ Vapor Canister Purge SolenoidSubaru Legacy 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$83.48 - $98.04
- WVE®Vapor Canister Vent SolenoidSubaru Legacy EJ253 Engine / EJ259 Engine 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...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$72.70
- Standard®Intermotor™ Vapor Canister Vent SolenoidSubaru Legacy 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 the highest...Made with precision and quality in mindDesigned to meet your specific needs$53.27
- Genuine®EGR Valve Vacuum ModulatorSubaru Legacy 2004, EGR Valve Vacuum Modulator by Genuine®. Location: Engine Bay. 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$138.21 - $192.07
Shop By Service Type
- EGR Valve Replacement
- Vent Oil Separator Replacement
- Oxygen Sensor Replacement
- EGR Vacuum Modulator Replacement
- Evaporation Vent Solenoid Replacement
- Air Pump Check and Diverter Valve Replacement
- Canister Purge Solenoid Replacement
- Air Pump Check Valve Replacement
- Positive Crankcase Ventilation (PCV) Valve Replacement
- Fuel Evaporative Canister Replacement
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2004 Subaru Legacy Models
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