Cheap BMW M4 Engine

The F82 BMW M4 (2014–2020) uses the S55B30A twin-turbocharged 3.0-litre inline-six, and that engine code is the single most important detail to give a breaker when sourcing a used unit. The G82 M4 (2021–present) moved to the S58B30A, also a twin-turbo 3.0-litre six but a different engine entirely, so the two are not interchangeable. You'll find the engine code on your V5C or via a VIN check, and quoting it directly saves any confusion over year or badge alone.

Both the 2016 and 2019 M4 sit within the F82 generation (2014–2020), and both use the S55B30A engine, so on paper the block and ancillaries should be compatible. However, there were mid-production running changes to ancillary parts and engine mountings that aren't always publicised, so confirm with the breaker against your exact registration before buying. ECU pairing and immobiliser coding will also need to be addressed by a specialist once the engine is fitted.

Yes — the F80 M3 saloon and the F82 M4 coupe share the same S55B30A engine across their respective production runs (M3 F80: 2014–2020; M4 F82: 2014–2020), so the engine itself crosses between these two bodystyles without issue. Trim and bodystyle do not affect engine fitment here, and breakers frequently pull S55 units from either model. As always, confirm ancillary and mounting details with the breaker against your registration, and factor in ECU and immobiliser coding with a BMW specialist.

No — the G82 M4 (2021–present) uses the S58B30A engine, while the F82 M4 (2014–2020) uses the S55B30A; these are different generations and different engine families. The G82 also uses a completely different chassis and engine bay, so an S58 will not drop into an F82 without extensive and impractical modification. Stick to sourcing an S55B30A unit if you own the F82 generation.

The Competition badge on the F82 M4 (introduced as a factory option and later a standalone model within the F82 generation) denotes a tune and suspension upgrade rather than a mechanically different engine — both standard and Competition variants use the S55B30A. Engine fitment is driven by the engine code, not the Competition designation, so a used S55 from a standard M4 will physically fit a Competition car. Confirm any ancillary or ECU differences with the breaker against your registration, and note that remapping or software differences between standard and Competition ECUs will need professional attention after installation.

Ask the breaker to confirm the full engine code matches your S55B30A and to check the engine has no bent con-rods or bore damage, as the S55 can suffer bottom-end issues if the car was driven hard or poorly maintained — a compression and leakdown test history is ideal. Confirm the mileage is documented and ask whether ancillary parts such as turbos, the oil pump, and the vanos units are included, as these significantly affect value and need to match your application. ECU and immobiliser coding to your vehicle will need to be handled separately by a BMW-specialist garage, so budget for that work before committing to the purchase.