Removing the system battery
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.
WARNING:
Working on 12 V electrical system.
Risk of short circuits! Risk of fire!
Risk of short circuits! Risk of fire!
- Make sure that there is no charger connected to the jump start terminal in the engine compartment.
- Detach battery ground lead from battery.
- For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
Preliminary work
- Refer to DISCONNECTING ALL BATTERY GROUND LEADS .
WARNING:
Working on 12 V electrical system.
Risk of short circuits! Risk of fire!
Risk of short circuits! Risk of fire!
- Make sure that there is no charger connected to the jump start terminal in the engine compartment.
- Detach battery ground lead from battery.
- For auxiliary batteries: Detach battery minus cables from all auxiliary batteries.
NOTE:
TECHNICAL INFORMATION
Follow notes on lithium ion battery. See additional information NOTES REGARDING THE LITHIUM ION BATTERY (M4 2021-2023) .
Follow notes on lithium ion battery. See additional information NOTES REGARDING THE LITHIUM ION BATTERY (M4 2021-2023) .
- Unclip the cover (1).NOTE: RISK OF DAMAGE
Damage to battery terminal, the safety battery terminal or the intelligent battery sensor (IBS).
Damaged battery terminals can lead to malfunctions or vehicle electrical system faults.- Detach battery terminal from battery pole by carefully shifting to and fro. Do not pry off using a tool.
- Open positive terminal cover (1).
- Release the nut (2).WARNING: Unprotected battery terminals.
Risk of short circuits! Risk of fire!- Cover the vehicle battery.
- Detach the positive battery terminal (3) from the system battery.
- Loosen screws (1).
- Remove the battery rollover protection bracket (2).
- Loosen screw (1).
- Remove the battery carrier (2).
- Unlock plug connection (1) and disconnect.
- Detach the vent hose (2).
- Remove the cover (3).
- Remove the vehicle battery (1).