BMW 8 Series Exhaust System Replacement Parts

The modern BMW 8 Series (G14/G15/G16) ran from 2018 onwards, with a facelift introduced in 2022 that brought updated styling but no fundamental change to the engine lineup. For exhaust fitment, what matters is your engine code and emissions standard rather than the facelift year, so a pre-facelift and post-facelift car sharing the same engine code are likely to share exhaust components. That said, always confirm the exact part numbers with the breaker against your registration before buying.

The 2022 model year sits right on the facelift boundary of the G15/G14 generation, so while the engine family may be shared, you should name that boundary clearly to any breaker and ask them to verify compatibility against both registrations. Exhaust routing and mounting points can differ across a facelift even when engines are carried over, and emissions calibration details may also vary. Route this question directly to the breaker with both registration numbers rather than assuming a straight swap.

The M Sport is a trim and equipment package on the 8 Series rather than a separate powertrain, and trim level does not affect exhaust fitment — what matters is the engine code and fuel type. However, M Sport models often feature different tailpipe finishers or cosmetic exhaust surrounds compared to standard cars, so a system from an M Sport may look slightly different at the rear even if it fits mechanically. Check the engine code matches and confirm with the breaker, and factor in any cosmetic differences to the rear valance if appearance matters to you.

No — diesel and petrol exhaust systems are not interchangeable on the 8 Series. The 840d carries a diesel particulate filter (DPF) as part of its exhaust system, which the petrol 840i does not use, and the pipework, mounting positions and aftertreatment components differ between the two fuel types. Always match the fuel type exactly when sourcing a used exhaust, and confirm the engine code with the breaker against your registration.

A used exhaust system on a diesel 8 Series must include an intact, functioning DPF to pass the UK MOT smoke and emissions tests, so any used diesel system you source needs to have its DPF in serviceable condition. Whether a specific used DPF or catalytic converter will meet the required emissions standard for your car's registration is strong confirm-with-breaker territory — the breaker will need your registration to check the emissions era and Euro standard that applies. Do not assume a visually identical system from a different year diesel is compliant without that check.

The M850i uses a different engine — the 4.4-litre twin-turbocharged V8 (N63/S63 family) — compared to the 840i's six-cylinder unit, so the exhaust systems are not interchangeable despite both being petrol models in the same G15 generation. Engine displacement, cylinder count and manifold configurations all differ, meaning pipework and mounting points will not align. Always quote both your engine code and registration to the breaker to ensure you're quoted the correct system.