61 20 900 Disconnecting and Connecting 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

Follow instructions for disconnecting and connecting battery . See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY

Observe notes on power supply /on intelligent battery sensor (IBS).

Necessary preliminary tasks:

Remove luggage compartment floor trim panel with fitted mat. See 51 47 101 REMOVING AND INSTALLING/REPLACING LUGGAGE COMPARTMENT FLOOR TRIM PANEL

Version with intelligent battery sensor (IBS):

Loosen nut (1).

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 (2).

Detach battery negative lead (3) with IBS (2) in upward direction, lay to one side and secure.

Fig 1: Identifying Battery Negative Lead, IBS & Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Version without intelligent battery sensor (IBS):

Disconnect battery negative lead (1). See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD

IMPORTANT: Cover battery negative terminal post and secure negative lead (1) at side.

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

Fig 2: Identifying Battery Negative Lead & IBS

Courtesy of BMW OF NORTH AMERICA, INC.