Oxygen Sensor for 2003-2004 Subaru Forester & More - Walker 350-64022

Walker Products 350-64022 oxygen sensor for the 2003-2004 Subaru Forester H4 2.5L and other vehicles measures the oxygen in the exhaust gas. This upstream, 4-wire, wide-band air-fuel ratio sensor tells the ECU how efficiently the engine is burning its fuel.

• Electrodes made of a gas-permeable platinum layer to read the oxygen content of the exhaust
• Coating protects the electrode surfaces from erosion and contamination by combustion residue and particulates
• Monitors exhaust gases to help reduce pollutants
• Oxygen readings help the ECU fine-tune the air-fuel ratio and support fuel economy
• Made for its specific application and fitment position, with the diagnostic feedback the ECU requires

Quick facts

• Part: Walker Products 350-64022 oxygen sensor
• Fits: 2003-2004 Subaru Forester H4 2.5L and other vehicles
• Position: Upstream
• Condition: New

A failing oxygen sensor can show up as a poorly running engine, higher fuel consumption or a lit malfunction indicator light. These signs alone do not prove the sensor is the problem, because a damaged wiring harness or connector can produce a similar picture.

Fits

The 2003-2004 Subaru Forester H4 2.5L, the 2003-2004 Subaru Outback H4 2.5L and the 2003-2004 Subaru Impreza H4 2.5L are among the vehicles this oxygen sensor fits. If your car is not one of these, look it up by year, model and engine in the "Vehicles it fits" section. These cars take one upstream sensor each, and this listing holds one.

Specifications