Second Hand BMW 4 Series Door Lock Mechanism

The F32/F33/F36 4 Series ran from 2013 to 2020, with a facelift introduced in 2017, and while the body structure is broadly the same generation, internal door mechanism components can change subtly across a production refresh. Confirm the exact part number with the breaker against both your registration and the donor car's registration before buying. Never assume a pre-2017 part is a guaranteed drop-in on a post-2017 car.

Yes, body style matters here — the F32 Coupe is a 2-door and the F36 Gran Coupe is a 4-door, so their door lock mechanisms are not interchangeable even though both share the same generation. Always tell the breaker which body style you have, not just '4 Series', so they pull from the correct donor vehicle.

Trim level — whether SE, Sport, M Sport, or M Sport Pro — does not affect door lock mechanism fitment on the 4 Series, as the mechanical latch and actuator assembly is determined by the door position and body style rather than specification level. You may find cosmetic differences in interior door furniture depending on trim, but the lock mechanism itself is the same. Tell the breaker your door side (NS or OS) and body style, and trim level can be set aside for fitment purposes.

No — door lock mechanisms are side-specific, and a nearside (passenger/left) front mechanism will not swap directly with an offside (driver/right) front mechanism. When contacting a breaker, always specify NS or OS clearly alongside your generation (F32, F33, or F36) and the year of your car.

Both years fall within the same F-series generation (2013–2020), but the 2019 car is post-facelift (2017 onwards) while the 2014 car is pre-facelift, and subtle changes in door architecture between these production phases mean fitment is not guaranteed. Name both registration years to the breaker and ask them to cross-reference part numbers before committing to a purchase.

Yes — the F33 Convertible and F32 Coupe have differently constructed doors to accommodate the convertible's structural and sealing requirements, so their lock mechanisms are not interchangeable. Always specify your exact body style (Coupe, Convertible, or Gran Coupe), door side (NS/OS), and registration year when requesting a quote from a breaker.