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Home >> BMW >> 2021 >> 430i xDrive >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> General Electrical System -- Repair (G22, G23 & G26) >> 61 21 Battery With Holder >> 61 21 003 Removing and installing the 12V dual storage system (4' Series coupe, convertible, and GranCoupe sedan) >> Removing the 12V dual storage system

Removing the 12V dual storage system

WARNING: Working on 12V 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.

Preliminary work 

WARNING: Working on 12V 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.
NOTE: Technical information 
Observe notes on 12V dual storage system.
See further information 6120... NOTES ON 12V DUAL STORAGE SYSTEM .
WARNING: Unprotected battery terminals. 
Risk of short circuits! risk of fire! 
  • Cover the vehicle battery.
G14198385Courtesy of BMW OF NORTH AMERICA, INC.