Walker Products 250-25047 rear oxygen sensor for the 2009-2016 BMW Z4 6-cylinder 3.0L and other vehicles measures the oxygen content of the exhaust gas. This Walker Products oxygen sensor is made for its specific application and fitment position, and it sends the ECU the diagnostic feedback that system needs.
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
- Tracks the air-fuel ratio so combustion efficiency can be monitored
- Oxygen readings help the ECU fine-tune the air-fuel mixture, which supports fuel economy
- Electrodes made of a gas-permeable platinum layer
Quick facts
- Part: Walker Products 250-25047 oxygen sensor
- Fits: 2009-2016 BMW Z4 6-cylinder 3.0L and other vehicles
- Position: Upstream, upstream rear
- Condition: New
A worn sensor can show up as the engine running poorly, higher fuel consumption or a lit malfunction indicator light, though a damaged wiring harness or connector can be behind the same signs, so look over the sensor, harness and connector for physical damage. If the sensor is the cause, this one replaces it.
Fits
The 2009-2016 BMW Z4 6-cylinder 3.0L, the 2011-2013 BMW 335is 6-cylinder 3.0L and the 2011 BMW 1 Series M 6-cylinder 3.0L all take this sensor, as do other BMW models. This listing is one sensor, which is the single sensor the fitment calls for on each. If your BMW is not named here, look it up in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Upstream, upstream rear
- Quantity per vehicle: 1
Build and materials
- Electrodes: gas-permeable platinum layer
- Condition: New
Frequently Asked Questions
Is this a BMW Z4 oxygen sensor for the 2009-2016 6-cylinder 3.0L?
Yes. Walker Products 250-25047 is listed for the 2009-2016 BMW Z4 6-cylinder 3.0L, and the fitment calls for one sensor.
Is the Walker Products 250-25047 an upstream sensor?
Yes. Walker Products 250-25047 is an upstream sensor, listed for the upstream rear position.
What does the coating on this oxygen sensor do?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases. The electrodes are made of a gas-permeable platinum layer.
Can a failing rear oxygen sensor turn on the malfunction indicator light?
Yes, it can. A failed sensor may also show as rough running, higher fuel consumption or more exhaust emissions, and newer vehicles store fault codes in the ECU.
What does this oxygen sensor report to the engine computer?
It reads the oxygen level in the exhaust gas and tracks the air-fuel ratio. That gives the ECU the feedback it uses for diagnostics and for adjusting the air-fuel mixture.
