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Home >> BMW >> 2021 >> 840i xDrive 2D Convertible >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> General Electrical System -- Repair (G14, G15, & G16) >> 61 21 Battery Replacement >> 61 21 004 Replacing the 12V dual storage system - registering with battery change - >> Installing the 12 V dual storage system

Installing the 12 V dual storage system

WARNING: Incorrect screw connection of the positive battery cable  .
Risk of fire! 
  • Ensure that the positive battery cable is screwed with the correct  nut.
TIGHTENING TORQUES SPECIFICATION

Positive battery terminal to battery
Nut tightening torque  5 Nm

Check: 

G15667671Courtesy of BMW OF NORTH AMERICA, INC.

Result: 

» The guide (1) or snap-in lugs (2) are damaged.

Measure: 

G15667672Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work