Walker Products Oxygen Sensor P/N:350-34303
Walker Products 350-33049 oxygen sensor for the 1993-1995 Subaru Impreza H4 1.8L and other vehicles measures the oxygen in the exhaust gas to show how well combustion is working. Each Walker part number is made for a specific application and fitment position.
A failing oxygen sensor can show up as rough running, higher fuel consumption or a lit malfunction indicator light. None of these proves the sensor is at fault, since a damaged wiring harness or connector can also set off the light.
This direct-fit sensor is an oxygen sensor for the 1993-1995 Subaru Impreza H4 1.8L, and it also fits the 1990-1994 Subaru Legacy H4 2.2L and the 1992-1997 Subaru SVX H6 3.3L. This listing is one sensor, and the 1992-1997 Subaru SVX H6 3.3L takes one.
Fit and size
Build and materials
Product information is for general reference and may contain errors. See our Disclaimer.
Is this an oxygen sensor for the 1990-1994 Subaru Legacy H4 2.2L?
Yes. Walker Products 350-33049 is listed for the 1990-1994 Subaru Legacy H4 2.2L.
Is the Walker Products oxygen sensor a narrow-band type?
Yes. Walker Products 350-33049 is a 3-wire, direct-fit narrow-band oxygen sensor.
Is this oxygen sensor upstream or downstream?
This part number is listed for upstream, downstream, upstream left and upstream right positions, depending on the application.
How do I check this oxygen sensor's wiring and connector for damage?
With the engine off and cool, look over the sensor, its wiring harness and the connector for physical damage. A shop can read the fault codes stored in the ECU.
What does the platinum layer on this oxygen sensor do?
The platinum layer is gas-permeable and forms the electrodes. The sensor's coating shields the electrode surfaces from contamination and erosion caused by combustion residue and particulates in the exhaust.
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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.