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Home >> BMW >> 2021 >> X4 xDrive30i >> Repair and Diagnosis >> General Information >> OEM General Information >> General Orphan Data (1 Of 2) >> Activating the 48 V electrical system

Activating the 48 V electrical system

Precondition 

Ignition is switched off.

NOTE: RISK OF DAMAGE 
Damage to the 48-V battery 
If a 48-V battery disconnected from the on-board electrical system is activated, the battery electronics are damaged. 
  • Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.
TIGHTENING TORQUES SPECIFICATION

Negative battery cable to 48-V battery
Nut M8 Tightening torque  19 Nm
G16028027Courtesy of BMW OF NORTH AMERICA, INC.
G16028029Courtesy of BMW OF NORTH AMERICA, INC.