Walker Products 350-341031 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 left in the exhaust gas. The engine control unit uses that reading to track combustion efficiency, and each part number is made for a specific application and fitment position.
- Measures oxygen levels to help fine-tune the air-fuel mixture for fuel economy
- Monitors exhaust gases so the system can reduce pollutants
- Electrodes with a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Heated narrow-band sensor with four wires and a threaded mount
Quick facts
- Part: Walker Products 350-341031 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 sensor can show up as an engine that runs poorly, higher fuel use or exhaust emissions, or a lit malfunction indicator light. Those signs alone do not prove the sensor is at fault, since a vacuum leak can also throw off the air-fuel readings. The sensor, wiring harness and connector can also be inspected for physical damage.
Fits
It is listed for a wide range of BMW and Toyota models, including the 2018-2021 BMW X3 4-cylinder 2.0L and the 2020-2024 X3 6-cylinder 3.0L, plus the 2021-2024 Toyota GR Supra 4-cylinder 2.0L. If your car is not named here, look up your year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: downstream, downstream left, downstream right
- Wiring harness length: 850 mm
- Wire quantity: 4
- Terminals: 4, spade, male
- Connector: oblong, female
Build and materials
- Sensor type: narrow-band
- Heated: yes
- Mounting type: threaded
- Grade: standard replacement
- Condition: new
- Country of origin: China
In the box
One oxygen sensor. This listing is one sensor; the cars named above take one each, and the number varies on other applications.
Frequently Asked Questions
Is this a BMW X3 oxygen sensor for both the 4-cylinder 2.0L from 2018-2021 and the 6-cylinder 3.0L from 2020-2024?
Yes. Walker Products 350-341031 is listed for the 2018-2021 BMW X3 4-cylinder 2.0L and the 2020-2024 X3 6-cylinder 3.0L, and each takes one sensor.
Can I use this sensor on a 2021-2024 Toyota GR Supra 4-cylinder 2.0L?
Yes. The 2021-2024 Toyota GR Supra 4-cylinder 2.0L is listed and takes one. For other cars, check your year and engine in the "Vehicles it fits" section.
Is this Walker Products oxygen sensor narrow-band, and is it heated?
Yes, it is a heated narrow-band sensor. Walker Products 350-341031 has four wires, four spade terminals and a threaded mount.
What can a failing downstream oxygen sensor do to the engine?
The engine can run poorly, fuel use or exhaust emissions can go up, or the malfunction indicator light can come on. Newer vehicles may also store a fault code related to the sensor.
How long is the wiring harness on this oxygen sensor?
The wiring harness on this sensor is 850 mm long. It has four wires and a female oblong connector.
