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Home >> BMW >> 2025 >> 230i >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> General Electrical System -- Repair (G42) >> 61 21 Vehicle Battery >> 61 21 017 Replacing vehicle battery - registering with battery replacement >> Removing the system battery

Removing the system battery

WARNING: Working on 12 V electrical system. 
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.
WARNING: Unprotected battery terminals. 
Risk of short circuits! Risk of fire! 
  • Cover the vehicle battery.

Preliminary work 

WARNING: Working on 12 V electrical system. 
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.
G14644713Courtesy of BMW OF NORTH AMERICA, INC.
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.
G14644986Courtesy of BMW OF NORTH AMERICA, INC.
WARNING: Unprotected battery terminals. 
Risk of short circuits! Risk of fire! 
  • Cover the vehicle battery.
G14644987Courtesy of BMW OF NORTH AMERICA, INC.
G14644988Courtesy of BMW OF NORTH AMERICA, INC.