Disconnecting the negative battery cable of the system battery
WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.
Precondition
Ignition is switched off.
WARNING:
Deactivate the 12-V electrical system
.
Risk of short circuits! Risk of fire!
Risk of short circuits! Risk of fire!
- Make sure that there is no battery charger connected to the jump start terminal in the engine compartment.
- For vehicles with additional electrical systems (48 V electrical system, high-voltage vehicle electrical system), this absolutely must be deactivated before the vehicle battery is disconnected.
- Slacken nut (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.
- Detach the negative battery terminal including the intelligent battery sensor (2) from the negative battery terminal.
- Put the battery ground lead to one side and secure it.