61 20 900 Disconnecting and connecting battery negative lead

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Observe SAFETY INSTRUCTIONS for handling vehicle battery.
Follow instructions FOR DISCONNECTING AND CONNECTING BATTERY !
Observe notes on POWER SUPPLY /on intelligent battery sensor (IBS).

Necessary preliminary tasks

Remove FRONT LUGGAGE COMPARTMENT FLOOR TRIM PANEL

Loosen nut (1).

Tightening torque 61 21 1AZ .

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

Detach battery negative lead with IBS towards top, lay to one side and secure.

Fig 1: Identifying Front Luggage Compartment Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Via BMW diagnosis system:

Carry out STEERING ANGLE SENSOR ADJUSTMENT .