Second Hand BMW M4 Lambda Sensor

Yes, all BMW M4 generations are petrol-engined and fitted with lambda (oxygen) sensors as part of their exhaust emissions system, used to monitor exhaust gases and help the engine management system control fuelling. The M4 has always been a petrol-only model, so lambda sensors are a genuine and expected fitment across the range. Both pre-cat and post-cat sensors are typically present, and the exact number can vary by engine variant and emissions standard.

The F82 M4 (2014–2020) used the S55 twin-turbocharged straight-six engine, while the G82 M4 (2021–present) uses the S58 engine — these are different engine families with different engine management systems and exhaust configurations, so the lambda sensors are unlikely to be interchangeable. The F82-to-G82 boundary is a clear generation break, and you should not assume a sensor from one will fit the other. Always confirm against your exact registration and engine code with the breaker before purchasing.

For lambda sensor fitment, the trim level — whether standard M4, Competition, or Competition xDrive — does not typically affect compatibility, as fitment is driven by the engine code and emissions standard rather than the trim specification. The S55 engine in F82 M4 and S55 Competition variants is the same unit, so the sensors should correspond, though minor differences in exhaust routing or sensor positioning are worth verifying. Confirm the engine code on your V5C and check with the breaker to be sure.

The F82 M4 ran from 2014 to 2020, all using the S55 engine throughout, so sensors from within that generation are more likely to be compatible than parts crossing a generation boundary. That said, there were updates during the F82 production run, and whether a specific sensor from a 2014 car matches one from a 2018 or 2019 car exactly is worth confirming with the breaker against both registration numbers. Emissions-era differences within a single generation are usually minor for lambda sensors, but the breaker can check part numbers to be certain.

The F82 M4 with the S55 engine typically runs multiple lambda sensors — usually pre-catalyst and post-catalyst positions in the exhaust — so it is important to know whether you need the upstream or downstream sensor, as they are different parts. The position (pre-cat or post-cat, nearside or offside) matters more for finding the right used part than trim level does. Tell the breaker your engine code, registration, and which sensor position you need to get an accurate match.

The F80 M3 saloon and F82 M4 coupe shared the same S55 engine, and in many cases lambda sensors from these two models are interchangeable given the shared engine architecture and emissions specification. However, exhaust routing and sensor positioning can differ slightly between body styles, so this is worth confirming with the breaker rather than assuming a straight swap. Give the breaker both registration numbers and let them verify part numbers before you commit to buying.