Bosch 16143 oxygen sensor for the 2017-2021 BMW 230i 4-cylinder 2.0L and other vehicles measures the air-fuel ratio in the exhaust and reports it to the ECU. This downstream, heated narrow-band unit helps the ECU keep combustion stable and emissions down.
- Bosch Switching-Type Oxygen (O2) Sensor, a narrow-band heated design that sends air-fuel-ratio measurements to the ECU
- Withstands exhaust streams up to 1,880°F; metal housing, integrated heater element and TSP coating resist vibration, corrosion and contamination
- Reaches operating temperature in less than 10 seconds for quick closed-loop control during cold starts
- Advanced ceramic elements and optimized heater control for consistent performance under thermal and vibration loads
Quick facts
- Part: Bosch 16143 oxygen sensor
- Fits: 2017-2021 BMW 230i 4-cylinder 2.0L and other vehicles
- Position: Downstream
- Material: Metal housing
- Condition: New
A check engine light, rough running or poorer fuel economy can mean a tired sensor, but each of them has other possible causes. Before you replace it, look over the sensor's wiring and connector for cracks, melted insulation or damage while the engine is off and cool.
Fits
This oxygen sensor also fits the 2017-2021 BMW 230i xDrive 4-cylinder 2.0L and the 2018-2021 BMW X3 4-cylinder 2.0L, plus many other BMW models. If your BMW isn't named here, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Downstream
- Thread size: M18 - 1.5
- Hex size: 22 mm
- Length (sealing surface to end of connector): 32.4 in
Build and materials
- Sensor type: Narrow-band, heated
- Housing material: Metal
- Coating: TSP coating
- Condition: New
- Warranty: Bosch 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks
- Country of origin: United States
In the box
One oxygen sensor with its wiring harness. A mounting bracket is not included. This listing is one sensor, and the number a vehicle takes varies by engine.
Installation notes
- Conductive anti-seize is pre-applied to the threads.
- Direct-fit connectors allow quick installation.
Frequently Asked Questions
Is this an oxygen sensor for the 2018-2021 BMW X3 4-cylinder 2.0L?
Yes. Bosch 16143 is a downstream oxygen sensor that fits the 2018-2021 BMW X3 4-cylinder 2.0L.
What thread size and hex does this Bosch O2 sensor have?
This sensor has an M18 - 1.5 thread and a 22 mm hex. Its length from the sealing surface to the end of the connector is 32.4 in.
Does the Bosch 16143 come with a wiring harness?
Yes, the Bosch 16143 oxygen sensor comes with its wiring harness. A mounting bracket is not included.
Is this oxygen sensor heated, and how fast does it warm up?
Yes. It is a narrow-band heated sensor with an integrated heater element, and it reaches operating temperature in less than 10 seconds.
Is this Bosch premium oxygen sensor covered by a warranty?
Yes. Bosch backs it with a 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks.
