Walker Products Oxygen Sensor P/N:350-34354
Walker Products 350-31001 oxygen sensor for the 1990-1992 Mazda MX-6 4-cylinder 2.2L and other vehicles measures the oxygen content of the exhaust gas. It gives the ECU the diagnostic feedback it needs for the upstream position.
A failing oxygen sensor can make the engine run poorly, raise fuel consumption and exhaust emissions, or turn on the malfunction indicator light. A damaged wiring harness or connector can be behind these signs too, so look both over for physical damage and find the cause before buying a sensor.
This upstream sensor is a direct-fit replacement oxygen sensor for the 1990-1991 Mazda 626 4-cylinder 2.2L and the 1990-1992 Mazda MX-6 4-cylinder 2.2L. Both cars take one.
Fit and size
Build and materials
Does the Walker Products 350-31001 fit the 1990-1991 Mazda 626 4-cylinder 2.2L?
Yes. Walker Products 350-31001 is a direct-fit upstream oxygen sensor for the 1990-1991 Mazda 626 4-cylinder 2.2L, and the 1990-1992 Mazda MX-6 4-cylinder 2.2L takes it too.
Is this Walker Products oxygen sensor narrow-band or wideband?
It is a narrow-band sensor. Walker Products 350-31001 reads the oxygen content of the exhaust gas and monitors the air-fuel ratio for combustion efficiency.
Is this an upstream or downstream oxygen sensor?
Upstream. This sensor is made for the upstream position, and the application takes one.
Can a weak oxygen sensor turn on the check engine light?
Yes, it can. A failed sensor can make the engine run poorly, raise fuel consumption or illuminate the malfunction indicator light.
What is the coating on this oxygen sensor for?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases. The electrodes use a gas-permeable platinum layer.
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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.