BMW M4 Catalytic Converter Replacement Parts

Yes, all BMW M4 variants are petrol-engined and carry catalytic converters as part of their exhaust emissions systems. The S55 engine (F82 generation, 2014–2020) and the S58 engine (G82 generation, 2021-onwards) both use cats, with the emissions standard of the car's registration year determining the exact specification required. Because these are high-performance engines with closely matched exhaust systems, the catalytic converter is a genuine and commonly replaced part on this model.

Both the 2016 and 2019 M4 fall within the F82 generation (2014–2020), which used the S55 twin-turbocharged straight-six throughout, so the engine architecture is consistent across those years. However, emissions calibration differences between individual model years within that generation mean the cats are not guaranteed to be identical, and using the wrong specification could cause an MOT failure. Confirm the exact part compatibility against your registration with the breaker before purchasing.

The F82 and G82 M4 generations use entirely different engines — the S55 in the F82 and the S58 in the G82 — and the exhaust systems are not interchangeable between them. These are a distinct generation boundary, so a cat from across that 2021 divide will not fit. Always source a cat specific to your generation and confirm the exact part number with the breaker against your registration.

Trim level does not affect catalytic converter fitment on the BMW M4; what matters is the engine code (S55 or S58) and the emissions specification tied to your registration year, not whether your car is a standard M4 or Competition variant. A cat sourced from a Competition model is not inherently different to one from a standard M4 of the same generation and emissions era, though minor differences in exhaust routing can exist — confirm the exact part against your registration with the breaker. You may simply notice cosmetic differences in the surrounding exhaust components between trim levels, but the cat specification itself follows the engine and emissions era.

Yes, Euro 6 compliance is an important factor because the catalytic converter is calibrated to meet the specific emissions standard the car was type-approved to, and fitting a unit from the wrong emissions era could cause your car to fail its MOT. The shift to Euro 6 affected BMW M4 production during the F82 generation, meaning cars registered in later F82 years may have a different catalyst specification to earlier ones even though the engine code is the same. This is strong confirm-with-breaker territory — give the breaker your full registration so they can match the correct emissions-era part.

M4 catalytic converters contain a high concentration of precious metals, which makes them a frequent target for theft and also means good used examples from reputable breakers do represent genuine savings over new OEM parts. It is worth asking the breaker to confirm the cat is complete, undamaged, and has not been tampered with, as partial or compromised units from theft-affected cars do circulate in the used market. Always verify the part against your exact registration before committing to a purchase.