61 12 013 Replacing battery negative lead

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Observe SAFETY INSTRUCTIONS for handling vehicle 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 61 21 1AZ .

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.

Disconnect plug connection (2).

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

Tightening torque 61 21 6AZ .

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

Courtesy of BMW OF NORTH AMERICA, INC.