61 12 013 Replacing negative battery lead

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WARNING: Observe SAFETY INFORMATION FOR HANDLING VEHICLE BATTERY .
Read and comply with notes on INTELLIGENT BATTERY SENSOR .

Necessary preliminary tasks:

Remove BATTERY COVER

Slacken nut (1) on negative battery terminal.

Tightening torque 61 21 1AZ .

IMPORTANT: Do not under any circumstances use force to pull off negative terminal.

Detach battery earth lead with intelligent battery sensor (IBS) in upward direction, lay to one side and secure.

Disconnect plug connection (2).

Release nut (3) and battery earth lead (4).

Tightening torque 61 21 6AZ .

Fig 1: Identifying Battery Earth Lead, Plug Connection And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.