Walker Products 350-34278 oxygen sensor for the 1995-1996 Mazda Millenia V6 2.5L, the 1995-2002 Millenia V6 2.3L and other vehicles measures the oxygen content of the exhaust gas. It is a downstream sensor whose readings let the ECU monitor the air-fuel ratio and combustion efficiency.
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Oxygen readings help fine-tune the air-fuel mixture for fuel economy
- Electrodes made of a gas-permeable platinum layer
- Monitors exhaust gases to help reduce pollutants
- Made for its specific application and fitment position, with the diagnostic feedback the ECU expects
Quick facts
- Part: Walker Products 350-34278 oxygen sensor
- Fits: 1995-1996 Mazda Millenia V6 2.5L, the 1995-2002 Millenia V6 2.3L and other vehicles
- Position: Downstream, downstream front, downstream rear
- Condition: New
A failing oxygen sensor can show up as an engine that runs poorly, higher fuel consumption or a lit malfunction indicator light. Before you replace this sensor, look over its wiring harness and connector for physical damage and have the stored fault codes read, since those signs can have other sources.
Fits
This sensor is listed for a wide range of Mazda and Ford models. Beyond the cars named at the top, it is an oxygen sensor for the 1997-2000 Mazda 626 V6 2.5L and the 1998-1999 626 4-cylinder 2.0L. This listing is one sensor, and the 1995-1996 Mazda Millenia V6 2.5L takes one.
Specifications
Fit and size
- Position: downstream, downstream front, downstream rear
- Quantity per vehicle: 1
Build and materials
- Condition: New
- Electrodes: gas-permeable platinum layer with a protective coating
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is Walker Products 350-34278 a Probe oxygen sensor for the 1997 Ford Probe V6 2.5L?
Yes. Walker Products 350-34278 is listed for the 1997 Ford Probe V6 2.5L, which takes one sensor. For any other car, look up its year, model and engine in the "Vehicles it fits" section.
Is Walker Products 350-34278 an upstream or downstream oxygen sensor?
It is a downstream sensor. The catalog lists its position as downstream, downstream front and downstream rear.
What are the electrodes in this oxygen sensor made of?
Walker Products 350-34278 has electrodes made of a gas-permeable platinum layer, with a coating that guards the electrode surfaces against combustion residue and particulates.
What signs can point to a failing downstream oxygen sensor?
Rough running, higher fuel consumption or a lit check engine light can be sensor-related, though other faults cause them too. A shop can read the codes and test the sensor.
What does this oxygen sensor tell the ECU?
This oxygen sensor reports the oxygen content of the exhaust gas, so the ECU can follow the air-fuel ratio and combustion efficiency.
