61 12 013 Replacing battery negative lead

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WARNING: Observe safety instructions and instructions for handling vehicle battery. See (SAFETY) INFORMATION ON AGM BATTERY and NOTES FOR DISCONNECTING AND CONNECTING BATTERY .
Read and comply with notes and instructions on INTELLIGENT BATTERY SENSOR .

Necessary preliminary tasks:

Clamp off BATTERY NEGATIVE LEAD
Remove LUGGAGE COMPARTMENT STORAGE COMPARTMENT

Slacken nut (1) on negative battery terminal.

Tightening torque: see 1AZ in 61 21 BATTERY WITH TERMINAL .

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

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

Fig 1: Identifying Battery With Nut, Plug Connection And Negative Lead

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (2).

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

Tightening torque: see 6AZ in 61 21 BATTERY WITH TERMINAL .