Walker Products 250-241214 oxygen sensor for the 2017-2021 BMW M240i 6-cylinder 3.0L and other vehicles measures the oxygen in the exhaust gas to show combustion efficiency. This Walker Products oxygen sensor gives the ECU the diagnostic feedback it requires for the downstream position.
- Narrow-band design with four wires
- Measures oxygen in the exhaust gas to monitor the air-fuel ratio and help fine-tune the mixture for fuel economy
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Electrodes carry a gas-permeable platinum layer
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-241214 oxygen sensor
- Fits: 2017-2021 BMW M240i 6-cylinder 3.0L and other vehicles
- Position: Downstream
- Condition: New
A failing oxygen sensor can show up as poor engine running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light, and those signs have other possible sources too. Before replacing the sensor, look over its wiring harness and connector for physical damage with the engine off and cool.
Fits
The 2017-2021 BMW M240i xDrive 6-cylinder 3.0L and the 2018-2021 BMW X3 6-cylinder 3.0L both fit this sensor, as do many other BMW models. It is engineered as an OE replacement for the specific application and fitment position. Own a different BMW? Look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Downstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: Narrow-band
- Wires: 4
- Electrodes: gas-permeable platinum layer
- Condition: New
In the box
One oxygen sensor. This listing is a single downstream sensor, and the BMW models it fits take one.
Frequently Asked Questions
Is this the right BMW X3 oxygen sensor for a 2018-2021 model with the 6-cylinder 3.0L?
Yes. Walker Products 250-241214 fits the 2018-2021 BMW X3 6-cylinder 3.0L as a downstream oxygen sensor, one per vehicle.
Is the Walker Products 250-241214 a narrow-band oxygen sensor?
Yes. Walker Products 250-241214 is a narrow-band sensor with four wires, made for the downstream position.
What does the coating on this oxygen sensor protect?
The coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust gas. The electrodes use a gas-permeable platinum layer.
What can a failing downstream oxygen sensor look like?
It can bring poor engine running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Newer vehicles store fault codes in the ECU, and a shop can read them.
Does this sensor fit a 2017-2021 BMW M240i xDrive with the 6-cylinder 3.0L?
Yes. The 2017-2021 BMW M240i xDrive 6-cylinder 3.0L is in the fitment for Walker Products 250-241214, which takes one downstream sensor.
