Remounting or replacing the emergency battery for the telematics control module
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
- Unlock and open battery compartment (1) on telematic control unit (2).
- Guide out the emergency battery for telematics control module (3) from the battery compartment and remount or replace it according to the test module instructions.
Replacement:
Parts: Emergency battery
- Feed in the emergency battery (3).
- Shut battery compartment (1) on telematics control unit (2) and lock.