Walker Products 250-241213 oxygen sensor for the 2019-2021 BMW X4 4-cylinder 2.0L, the 2020-2025 X4 6-cylinder 3.0L and other vehicles measures the oxygen in the exhaust gas to show combustion efficiency. It is a narrow-band, direct-fit design made for its specific application and fitment position.
- Measures oxygen levels to help fine-tune the air-fuel mixture and support fuel economy
- Gives the ECU the diagnostic system feedback its application requires
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases
- Electrodes made of a gas-permeable platinum layer
Quick facts
- Part: Walker Products 250-241213 oxygen sensor
- Fits: the 2019-2021 BMW X4 4-cylinder 2.0L, the 2020-2025 X4 6-cylinder 3.0L and other vehicles
- Position: Downstream, downstream left, downstream right
- Condition: New
A failing oxygen sensor can show up as rough running, higher fuel use or a lit malfunction indicator light. Those symptoms have other possible sources, so with the engine off and cool, look over the sensor, its wiring harness and its connector for physical damage before you replace anything.
Fits
The vehicles it fits include the 2018-2021 BMW X3 4-cylinder 2.0L, the 2020-2024 X3 6-cylinder 3.0L and the 2021-2024 Toyota GR Supra 4-cylinder 2.0L. If your car is a different model, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: downstream, downstream left, downstream right
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
- Number of wires: 4
Build and materials
- Type: narrow-band, direct fit
- Condition: new
In the box
This listing holds one oxygen sensor, and each vehicle it fits takes one.
Frequently Asked Questions
Does this BMW X3 oxygen sensor fit the 2018-2021 BMW X3 4-cylinder 2.0L?
Yes. Walker Products 250-241213 fits the 2018-2021 BMW X3 4-cylinder 2.0L and the 2020-2024 X3 6-cylinder 3.0L, with one sensor per vehicle.
What type of oxygen sensor is the Walker Products 250-241213, and what thread does it have?
The Walker Products 250-241213 is a narrow-band, direct-fit sensor with four wires and an M18 - 1.5 thread.
Is this a downstream oxygen sensor?
Yes. Its catalog position is downstream, listed as downstream, downstream left and downstream right.
Could rough running or a lit malfunction light mean a narrow-band oxygen sensor has failed?
Yes, they can. A failed oxygen sensor may make the engine run poorly, raise fuel consumption or light the malfunction indicator. Newer vehicles also store fault codes in the ECU, some tied to the sensor.
Does this Walker Products oxygen sensor have a coating on its electrodes?
Yes. A protective coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates, and the electrodes are a gas-permeable platinum layer.
