Walker Products Oxygen Sensor P/N:250-25144
Walker Products 250-54064 oxygen sensor for the 2011-2013 Subaru Forester H4 2.5L and other vehicles senses the oxygen content of the exhaust gas.
A worn Walker Products oxygen sensor can show up as rough running, higher fuel use, more exhaust emissions or a lit malfunction indicator light. A damaged wiring harness or connector can be behind the same signs, so inspect both before you replace the sensor.
The 2011-2013 Subaru Forester H4 2.5L, the 2008-2009 Subaru Outback H4 2.5L and the 2009-2014 Subaru Impreza H4 2.5L are among the vehicles this sensor fits, along with other Subaru models. If your car is not named here, run its year and engine through the "Vehicles it fits" section.
Fit and size
Build and materials
One oxygen sensor. The 2011-2013 Subaru Forester H4 2.5L takes one.
Is this Subaru Outback oxygen sensor right for a 2008-2009 Outback H4 2.5L?
Yes. Walker Products 250-54064 fits the 2008-2009 Subaru Outback H4 2.5L, and it also fits the 2011-2013 Subaru Forester H4 2.5L.
What thread size does this oxygen sensor have?
Walker Products 250-54064 is a threaded sensor with an M18 - 1.5 thread.
Is this oxygen sensor an upstream or downstream sensor?
It is an upstream sensor. This listing is one sensor, and the vehicles it fits take one.
What can a failing upstream oxygen sensor cause?
A failing upstream oxygen sensor can lead to rough running, higher fuel use or a lit malfunction indicator light. A shop can read the stored fault codes to see which sensor is involved.
Does Walker Products 250-54064 work as a Subaru Impreza oxygen sensor for a 2009-2014 Impreza H4 2.5L?
Yes. It fits the 2009-2014 Subaru Impreza H4 2.5L. For other Subaru years and engines, use the "Vehicles it fits" section.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.