Walker Products 350-34025 oxygen sensor for the 1992-1995 BMW 325i 6-cylinder 2.5L and other vehicles measures combustion efficiency from the amount of oxygen in the exhaust gas. It is engineered as an OE replacement and gives the diagnostic feedback the ECU requires.
- Narrow-band sensor with 4 wires
- Measures oxygen levels to help fine-tune the air-fuel ratio
- Monitors exhaust gases to help reduce pollutants
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Electrodes made of a gas-permeable platinum layer
Quick facts
- Part: Walker Products 350-34025 oxygen sensor
- Fits: 1992-1995 BMW 325i 6-cylinder 2.5L and other vehicles
- Position: Upstream, upstream left, upstream right
- Condition: New
A failing sensor can show up as a poorly running engine, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light, and those signs can have other sources too. Before you replace the sensor, rule out physical damage to its wiring harness and connector, since damage there can also shorten a sensor's life.
Fits
The vehicles it fits include the 1992-1995 BMW 325is 6-cylinder 2.5L and the 1995 BMW M3 6-cylinder 3.0L, as a direct-fit replacement. Open the "Vehicles it fits" section to check your exact model and engine. This listing is one sensor for one upstream position, and each application takes one.
Specifications
Fit and size
- Position: Upstream, upstream left, upstream right
- Quantity per application: 1
- Thread size: M18 - 1.5
Build and materials
- Type: Narrow-band oxygen 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
Will this BMW M3 oxygen sensor fit the 1995 M3 with the 6-cylinder 3.0L engine?
Yes. Walker Products 350-34025 is listed for the 1995 BMW M3 6-cylinder 3.0L, and that application takes one sensor.
What type of sensor is the Walker Products 350-34025, and how many wires does it have?
Walker Products 350-34025 is a narrow-band oxygen sensor with 4 wires and an M18 - 1.5 thread.
What are the electrodes on this oxygen sensor made of?
The electrodes are made of a gas-permeable platinum layer. A coating over their surfaces guards against contamination and erosion from combustion residue and particulates.
My check engine light is on. Could this oxygen sensor be the reason?
It can be, if the sensor has failed. A shop can read the stored ECU codes to see which sensor is involved.
Does this oxygen sensor go upstream or downstream?
Upstream. Walker Products 350-34025 is listed for the upstream, upstream left and upstream right positions.
