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Home >> BMW >> 2020 >> X3 M Base >> Repair and Diagnosis >> General Information >> OEM General Information >> General Orphan Data -- X3 M (F97) (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 that is disconnected from the electrical system is activated, the battery electronics will be damaged. 
  • Only ever activate the 48 V electrical system when the 48 V battery is fully connected up.
TIGHTENING TORQUE SPECIFICATIONS

Negative battery cable to 48-V battery 
Nut M8 Tightening torque  19 Nm
G14192780Courtesy of BMW OF NORTH AMERICA, INC.
G14192779Courtesy of BMW OF NORTH AMERICA, INC.

The activation takes place automatically.

G14192798Courtesy of BMW OF NORTH AMERICA, INC.