BMW i4 Engine Replacement Parts

The BMW i4 is a fully electric vehicle, so rather than a combustion engine code it uses one or more electric drive units — the eDrive40 uses a single rear motor and the M50 uses dual motors front and rear. When contacting a breaker, give them your full VIN or registration so they can confirm the exact drive unit configuration, as the motor and associated power electronics differ between variants. Quoting your specific model (eDrive40 or M50) alongside the year will save time and reduce the chance of being sent the wrong unit.

The BMW i4 launched in 2021 (G26 platform) and has continued in that generation, with a mid-cycle update arriving for the 2024 model year that brought revised drive units with increased power outputs. That 2024 update is a meaningful boundary — a drive unit from a pre-update car may differ in specification from a post-update one, so you should confirm with the breaker whether the unit they hold matches your car's build date and variant before buying. Never assume fitment across that boundary without checking your VIN against the donor car's details.

Trim level itself does not affect fitment in the way cosmetic features do, but the eDrive40 and M50 are fundamentally different powertrain configurations — the eDrive40 is single-motor rear-wheel drive and the M50 is dual-motor all-wheel drive, so their drive units, inverters, and ancillaries are not interchangeable. If your car is an eDrive40, you need an eDrive40 drive unit; if it is an M50, you need the correct front and rear motors for that variant. Tell the breaker your exact model designation and supply your registration so they can match the specification precisely.

No — for an electric vehicle the drive unit listing really needs to state whether it is a rear motor (as found in the eDrive40) or one of the dual motors from the M50, along with the model year, because specification changed at the 2024 update. Without that detail you have no reliable way to confirm the unit will match your car's inverter, software, and mounting arrangement. Ask the breaker for the donor car's full VIN and confirm the specification against your own registration before committing.

The body style of the i4 does not change the drive unit specification — what matters is the powertrain variant (eDrive40 or M50) and the model year relative to the 2024 update. A breaker should be matching the unit to your VIN and drivetrain configuration, not to the roofline of your car. That said, confirm with the breaker whether any ancillary mounting brackets or cooling connections differ on the donor car, as those details can vary mid-production and are worth checking against your registration.

It is very likely that some level of software work will be required after fitting a used electric drive unit to an i4, as BMW's systems pair components to the vehicle and the high-voltage battery management, inverter, and drive unit all communicate closely. Whether full coding or re-flashing is needed in your specific case is something to confirm with the breaker and a BMW specialist before you buy, as requirements can vary. Budget for this work when comparing the cost of a used unit against a remanufactured or exchange option.