Used BMW iX Differential

The BMW iX (I20) launched in the UK in 2021 and remains in its first generation, so a 2022 and a 2024 are both within that same generation run. However, the most reliable way to confirm interchange is to match the engine code from your V5 or a VIN check rather than relying on year alone, as specification changes can occur mid-production. Give your exact engine code to the breaker and ask them to cross-reference it against the donor vehicle before committing.

The xDrive40 and xDrive50 are both all-wheel-drive variants of the iX (I20), but they use different electric drive units producing different outputs, which means the rear differential assembly is unlikely to be a direct swap. Trim level itself does not affect fitment, but the underlying motor and drivetrain specification absolutely does, so matching the engine or drive-unit code from your V5 or a VIN check is essential here. Confirm with the breaker that the donor unit code matches yours before purchasing.

The BMW iX eDrive20 is rear-wheel drive and does not have a front drive unit or front differential, whereas xDrive models have separate front and rear drive units; these are not interchangeable between drivetrains. Always confirm which axle and which drive configuration you need, and supply your engine or drive-unit code to the breaker so they can match the correct unit.

Yes — the drive-unit or engine code and the drivetrain configuration (xDrive or eDrive) matter far more than the trim name when it comes to differential fitment, because trim differences on the iX are largely about software, interior, and cosmetic features rather than the physical driveline components. Two cars with different trim badges but the same drive-unit code are far more likely to share a compatible differential than two cars with the same trim badge but different motor specifications. Pull the engine or drive-unit code from your V5 or a VIN check and lead with that when speaking to a breaker.

BMW has not announced a formal named facelift for the iX (I20) as of mid-2025, so there is no confirmed pre/post-facelift boundary to work from here. Mid-cycle running changes can still occur within a generation, however, so if you are crossing model years you should confirm with the breaker against your specific registration that the donor unit matches your drive-unit code and any mounting or ancillary specifications.

Electric drive units on modern BMWs can involve coding and communication with the vehicle's control systems, and whether a used differential or drive unit will operate correctly without reprogramming is something you need to confirm with the breaker and, ideally, a BMW specialist before buying. This is not something that can be stated as a blanket rule here, as it depends on the specific unit and your car's configuration.