Second Hand BMW 4 Series Dual Mass Flywheel

Yes, the BMW 4 Series is fitted with a dual mass flywheel (DMF) on its manual gearbox variants — these include the diesel engines such as the 420d and 430d, and certain petrol manual variants. Automatic gearbox versions do not use a dual mass flywheel in the same way, as they use a torque converter instead, so if your 4 Series is an automatic you will not need a DMF. If you are unsure which gearbox type you have, check your V5 or run a VIN check before requesting quotes.

The BMW 4 Series F-generation (F32 coupe, F33 convertible, F36 gran coupe) ran from 2013 to 2020 with a facelift in 2017, and a DMF from within this generation is most likely to be compatible if the engine code matches yours exactly — the engine code is the single most important detail for this part. Fitment can vary between pre-facelift (2013–2017) and post-facelift (2017–2020) cars even if the engine designation looks the same, so always confirm across that boundary with the breaker against your registration. Supply your engine code from your V5 or a VIN check when requesting quotes.

No — body style does not affect DMF fitment; the flywheel is part of the drivetrain and is determined by the engine code and gearbox type, not by whether your car is an F32 coupe, F33 convertible, or F36 gran coupe. A breaker quoting from any of those body styles can supply a compatible unit provided the engine code and gearbox type match yours. Focus your conversation with the breaker on the engine code rather than the body style.

Trim level does not affect DMF fitment on the 4 Series — whether your car is a Sport, M Sport, Luxury, or SE, the flywheel is determined entirely by the engine code and gearbox type. You may notice cosmetic differences between donor cars from different trims when visiting a breaker, but these have no bearing on whether the flywheel itself will fit. Confirm your engine code from your V5 and supply it to the breaker when requesting a quote.

The 4 Series F-generation shares its platform and many engines with the contemporary F30/F31/F34 3 Series, so a DMF from a 3 Series with the same engine code and gearbox type may well be compatible. However, because mounting and ancillary specifications can vary between models even with the same engine code, you should confirm this cross-model interchange directly with the breaker against both registrations rather than assuming it will fit. Providing your engine code to the breaker is the best starting point.

The 420d ran throughout the F32 generation (2013–2020), but the 2015 car is pre-facelift and the 2019 car is post-facelift (facelift from 2017), and engine specifications including ancillary fitment details can change across that boundary even when the badge is identical. The engine code is the definitive check here — if both cars share exactly the same engine code and gearbox type, compatibility is more likely, but you should still confirm the specific part interchange across the facelift year with the breaker against your registration. Never assume fitment based on the model name alone.