Oxygen Sensor for 1999-2004 Subaru Forester & More - Walker 350-34337

Walker Products 350-34337 oxygen sensor for the 1999-2004 Subaru Forester H4 2.5L and other vehicles measures the oxygen in the exhaust gas to track combustion efficiency. It is made for its specific application and fitment position, and it returns the diagnostic feedback the ECU needs.

• Monitors exhaust gases and reduces pollutants for a cleaner environment
• Electrodes with a gas-permeable platinum layer
• Coating protects the electrode surfaces from contamination and erosion by combustion residue and exhaust particulates
• Oxygen readings are used to fine-tune the air-fuel mixture, which helps fuel economy
• Narrow-band design with 4 wires for the downstream position

Quick facts

• Part: Walker Products 350-34337 oxygen sensor
• Fits: 1999-2004 Subaru Forester H4 2.5L and other vehicles
• Position: Downstream
• Condition: New

A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Those signs alone do not prove the sensor is at fault, since a vacuum leak is another common source.

Fits

It works as an oxygen sensor for the 1999-2004 Subaru Forester H4 2.5L, the 1999 Subaru Impreza H4 2.2L and the 1999-2004 Impreza H4 2.5L. This listing is one sensor, and each engine listed takes one in the downstream position.

Specifications

Product information is for general reference and may contain errors. See our Disclaimer.