Second Hand BMW 3 Series Crankshaft

The crankshaft must match the engine code first and foremost, not just the generation or year — BMW used several different engines across the E46, E90/E91/E92/E93, F30/F31/F34, and G20/G21 generations, so a crank from a 2005 E46 will not fit a 2012 F30 even if both are 320d badges. Your engine code (found on your V5 or via a VIN check) is the single most useful detail to give a breaker when sourcing this part. Never assume year-to-year compatibility without confirming engine codes match.

The F30/F31 generation ran from 2012 to 2019, with a facelift arriving in 2015, but whether the crankshaft crosses that facelift boundary depends entirely on whether BMW changed the engine specification at that point for your specific engine code. If your engine code is identical on both sides of the 2015 facelift, fitment is likely, but ancillary or mounting changes mid-production should be confirmed with the breaker against your registration before buying. Providing your exact engine code gives the breaker the best chance of finding a confirmed match.

No — body style is irrelevant for crankshaft fitment; the crank lives inside the engine block and is determined entirely by engine code, not whether your car is a saloon (F30/G20), estate (F31/G21), coupe (E92), or convertible (E93). Focus solely on matching engine codes and fuel type when sourcing this part. Body style or roof style will make no difference whatsoever to whether a crankshaft fits.

Trim level has no effect on crankshaft fitment — SE, Sport, M Sport, and M Sport Pro are specification packages covering interior, suspension, and cosmetic items, not engine internals. What matters is the engine code underneath the bonnet, which can be identical across all trim levels on the same model year. Confirm the engine code with your breaker and ignore the trim badge entirely when sourcing this part.

Yes, fuel type matters significantly — diesel and petrol engines are entirely different units with different block designs, stroke lengths, and crankshaft specifications, so a crank from a 320d diesel will not fit a 320i petrol even if both cars are from the same generation and year. Always specify both your fuel type and engine code when requesting quotes from a breaker. Mixing fuel types is one of the most common sourcing mistakes for internal engine components.

Possibly not — even within diesel variants of the same generation, BMW used different engine codes and different crankshaft specifications depending on displacement and power output, so a 318d, 320d, and 330d are likely to have different cranks despite sharing a fuel type. Check your exact engine code on your V5 or via a VIN check and supply that to the breaker rather than going by the badge alone. The breaker can then cross-reference their stock against your specific code to confirm compatibility.