BMW i7 Alternator Replacement Parts

The BMW i7 (G70) launched in the UK in 2022 as the fully electric version of the 7 Series, and as of 2025 it remains within its first generation with no facelift boundary yet established. For alternator purposes this is largely academic, since the i7 is a battery-electric vehicle and does not have a conventional alternator in the way a petrol or diesel car does. What it does carry is a DC-DC converter that performs a similar role — charging the 12V auxiliary battery from the high-voltage pack — and this is the component breakers will list under that function. Confirm the exact part description and your registration with the breaker before ordering.

The xDrive60 and M70 are different trim and performance variants of the G70 i7, but trim level alone does not determine fitment for the DC-DC converter that replaces the alternator function in this electric vehicle. What matters is the specific drivetrain and power electronics configuration, which can differ between the standard xDrive60 and the higher-output M70 — so treat these as potentially different applications even though the body and generation are the same. Confirm fitment against both registrations with the breaker, as the M70's dual-motor high-performance setup may use different components to the single-orientation xDrive60 system.

Both 2022 and 2024 i7s sit within the same G70 first generation, so on the face of it the DC-DC converter unit could be shared, but BMW has been known to introduce running production changes to electrical architecture mid-cycle. Name the generation (G70, from 2022) when speaking to a breaker, but ask them to cross-reference both registrations directly rather than assuming a 2022-sourced unit will drop straight in. Confirm with the breaker against your registration, particularly given that ECU pairing and any coding requirements for this component are not something we can guarantee.

The eDrive50 is a rear-wheel-drive single-motor variant and the xDrive60 is all-wheel-drive with dual motors, so the drivetrain architecture is meaningfully different between them. The DC-DC converter function may be shared across variants, but the mounting, integration, and software calibration could differ, and this is exactly the kind of mid-production or variant-level ancillary detail you should confirm with the breaker against your specific registration rather than assume. Trim and badge do not drive fitment here — powertrain configuration does.

Yes, G70 is the correct BMW internal chassis code for the i7 across all variants sold in the UK from 2022 onwards, including the xDrive60, eDrive50, and M70 xDrive. Using G70 when searching or speaking to a breaker is more reliable than using the badge alone, and quoting your full VIN or registration alongside it will help the breaker pinpoint the exact DC-DC converter specification your car needs. This is especially useful for a complex electrical component where the part number can vary by output rating or software version even within the same chassis code.

Whether this component requires coding or pairing to your specific vehicle's ECU is a question we cannot answer definitively, and you should raise it with your fitting garage and confirm with the breaker before purchasing. BMW's high-voltage electrical systems frequently involve software integration, and a unit that physically fits may still require dealer or specialist coding to function correctly. A reputable breaker will often know from experience whether a given part has caused coding issues, so ask them directly and factor any coding costs into your budget before committing.