Remove the BDC control unit
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2023 BMW M5, 2022 BMW M5, 2021 BMW M5, 2020 BMW M5, and 2019 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
Preliminary work
- Refer to DEACTIVATING THE 48 V ELECTRICAL SYSTEM .
- Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
- Refer to REMOVING FOOTWELL TRIM PANEL ON THE RIGHT .
- Refer to REMOVING FRONT ENTRANCE COVER STRIP .
- Refer to REMOVING THE SIDE TRIM PANEL IN THE FOOTWELL AT THE RIGHT-HAND A-PILLAR .
- Fold the carpet (1) to the side.
- Release screw (2) the cover (3).
- Loosen the detents (1).
- Guide cover (2) out in arrow direction.
- Unlock and disconnect all connectors (1).
- Swivel the BDC control unit (2) slightly in the direction of the arrow.
- Unlock and disconnect all connectors (1).
- Guide out the BDC control unit (1).
- Unlock and disconnect the connector of the positive battery cable (3) on the BDC control unit (4).
It is essential to observe the sequence:
- Release lock (1) arrow direction.
- Disengage the detent (2) on positive battery cable connector (3).
- Remove the connector of the positive battery cable (3) in arrow direction.