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Home >> BMW >> 2018 >> 330e >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> General Electrical System - Repair -- (F30 Hybrid 330E) >> 61 21 Battery With Holder >> 61 21 008 Removing and installing the vehicle battery (Starter unit battery) >> Removing the vehicle electrical system support battery

Removing the vehicle electrical system support battery

WARNING: High-voltage system. 
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock! 
  • All work on the high-voltage system may only be carried out by specially trained and technically experienced personnel.
  • For additional information see:

SAFETY INSTRUCTIONS ON HANDLING HYBRID CARS  
  • For additional information see:

NOTES ON REPAIR OF HIGH-VOLTAGE BATTERY UNIT 
NOTE: TECHNICAL INFORMATION 
With the ignition off and the high-voltage safety plug disconnected, the Check Control message "High voltage system faulty" is displayed by default.
The message "High-voltage system switched off" (absence of voltage) is only displayed when the ignition is switched on.

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.
G14552599Courtesy of BMW OF NORTH AMERICA, INC.