61 12 013 Replacing Battery Negative Lead

WARNING: This page is about a different car, the 2010 BMW 650i, 2009 BMW 650i, 2008 BMW 650i, 2007 BMW 650i, and 2006 BMW 650i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Observe safety instructions for handling vehicle battery. See 61 00 ... SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY

Notes and instructions on Intelligent Battery Sensor IBS . See 61 12 ... GENERAL INFORMATION ON INTELLIGENT BATTERY SENSOR (IBS)

Necessary preliminary tasks:

Remove luggage compartment floor trim panel . See 51 47 101 REMOVING AND INSTALLING/REPLACING LUGGAGE COMPARTMENT FLOOR TRIM PANEL
Remove trim on tail panel . See 51 46 050 REMOVING AND INSTALLING/REPLACING TOP TRIM ON REAR APRON
Remove right luggage compartment wheel arch trim . See 51 47 161 REMOVING AND INSTALLING/REPLACING RIGHT LUGGAGE COMPARTMENT WHEEL ARCH TRIM

Remove underlay for floor panel (1).

Slacken nut (2) on battery negative terminal.

Tightening torque 61 21 1AZ . See 61 21 BATTERY WITH TERMINAL

IMPORTANT:

Do not under any circumstances use force to pull off pole shoe.

Do not under any circumstances release socket-head cap screw of IBS.

Detach battery negative lead (5) with intelligent battery sensor (IBS) in upward direction.

Disconnect plug connection (3).

Disconnect plug connection (4).

Release nut (6) and battery negative lead (5).

Tightening torque 61 21 2AZ . See 61 21 BATTERY WITH TERMINAL

Fig 1: Identifying Plug Connection, Nut & Battery Negative Lead

Courtesy of BMW OF NORTH AMERICA, INC.