Walker Products 350-64020 oxygen sensor for the 2011-2013 Subaru Forester H4 2.5L and other vehicles measures the oxygen in the exhaust gas to gauge combustion efficiency. This upstream wide-band sensor is made for its specific application and fitment position, and it returns the diagnostic feedback the ECU requires.
- Wide-band air fuel ratio sensor with 4 wires
- Electrodes made of a gas-permeable platinum layer
- Measures the oxygen content of the exhaust gas to monitor the air fuel ratio for combustion efficiency
- Coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 350-64020 oxygen sensor
- Fits: 2011-2013 Subaru Forester H4 2.5L and other vehicles
- Position: Upstream
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or switch on the malfunction indicator light. Before you replace it, look over the wiring harness and connector for physical damage and have a shop read the stored fault codes, so you know the sensor itself is the problem.
Fits
The vehicles it fits include the 2012-2014 Subaru WRX H4 2.5L and the 2008-2009 Subaru Outback H4 2.5L, along with the car named in the opening. If your Subaru is not named here, look up your year and engine in the "Vehicles it fits" section. This listing is one sensor, and the 2008-2009 Subaru Outback H4 2.5L takes one.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Thread: M18 - 1.5
Build and materials
- Type: Wide-band air fuel ratio sensor, 4 wires
- Electrodes: gas-permeable platinum layer
- Condition: New
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the Subaru Outback oxygen sensor for the 2008-2009 Outback with the H4 2.5L engine?
Yes. Walker Products 350-64020 fits the 2008-2009 Subaru Outback H4 2.5L, which takes one upstream sensor.
Is this the Subaru WRX oxygen sensor for the 2012-2014 WRX with the H4 2.5L engine?
Yes. Walker Products 350-64020 is listed for the 2012-2014 Subaru WRX H4 2.5L, in the upstream position.
Is this Walker Products oxygen sensor a wide-band type?
Yes. It is a 4-wire wide-band air fuel ratio sensor that monitors the oxygen content of the exhaust gas for combustion efficiency.
What does the coating on this oxygen sensor do?
The coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases. The electrodes are a gas-permeable platinum layer.
Will the ECU store a fault code for a failing oxygen sensor?
Newer vehicles store fault codes in the ECU, and some relate to the affected sensor. Walker Products 350-64020 is made to return the diagnostic feedback the ECU requires for its application.
