Install battery ground lead

• Position battery ground lead (3).
• Tighten nut (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Battery ground lead to body
  Flange nut M8	tightening torque	15 Nm

• Connect connector (2) with the intelligent battery sensor (IBS).

Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to CONNECTING ALL BATTERY GROUND LEADS .
• Refer to ACTIVATING THE 48 V ELECTRICAL SYSTEM .