Cheap BMW i4 Gearbox

The BMW i4 is a fully electric vehicle, so it does not use a conventional multi-speed gearbox in the traditional sense — instead it uses a single-speed reduction gearbox integrated with the electric drive unit. When searching for a used unit, you are essentially looking for the electric drive module or reduction gear assembly rather than a petrol or diesel gearbox. Always confirm the exact part description with the breaker against your registration, as terminology varies between dismantlers.

The BMW i4 (G26) launched in the UK in 2021 and received a mid-cycle update for the 2024 model year, bringing revised software and some hardware changes to the drivetrain. Parts from pre-2024 cars and post-2024 cars may not be directly interchangeable even though the model name is the same, so if your car sits near that 2024 boundary you should confirm compatibility with the breaker against your exact registration and VIN before purchasing.

The 2024 model year marks the mid-cycle update for the i4 (G26), and there is a real possibility that drivetrain or ancillary mounting details changed across that boundary. Name the boundary confidently — pre-2024 versus 2024-on — but whether a specific drive unit crosses it is something you must confirm with the breaker against your registration and VIN, as internal changes are not always reflected in the external part number alone. Never assume fitment across a facelift boundary without that check.

Yes, in this case trim level does matter mechanically for the i4, because the eDrive40 is rear-wheel drive with a single motor, the xDrive40 is all-wheel drive with two motors, and the M50 is also all-wheel drive but with higher-output motors — each configuration uses a different drive unit. Unlike purely cosmetic trims where the same part fits across the range, you must match the drive unit to the correct drivetrain variant, not just the i4 badge. Always supply your exact trim and registration to the breaker so they can identify the correct unit.

The i4 (G26) and iX3 (G08) are built on different platforms and use different electric drive architectures, so their drive units are not considered interchangeable. Even where motor technology is shared at a component level, physical mounting points, software pairing, and ancillary connections are likely to differ. Stick to sourcing a unit confirmed by the breaker as pulled from an i4 of the same drivetrain variant as your car.

This is a genuinely important question for electric vehicles, as the drive unit, battery management system, and vehicle ECU can be paired or coded together from the factory. Whether a used unit will operate correctly without specialist recoding is something you must confirm with both the breaker and a BMW-experienced auto-electrician before buying, as we cannot state this as fact here. Budget for potential coding work when calculating the overall cost of a used unit.