61 20 900 Disconnecting and connecting battery earth lead

WARNING: Observe SAFETY INFORMATIONS for handling vehicle battery.
Follow INSTRUCTIONS for disconnecting and connecting battery

IMPORTANT: Do not under any circumstances use force to pull/lever off INTELLIGENT BATTERY SENSOR (IBS) !

Necessary preliminary work

Loosen nut (1).

Tightening torque: 61 21 1AZ .

Disconnect battery earth lead (3) and secure at side.

Fig 1: Identifying Battery Earth Lead Nut

Courtesy of BMW OF NORTH AMERICA, INC.