61 20 900 Disconnecting and connecting battery negative lead

WARNING: Observe SAFETY INSTRUCTIONS for handling vehicle battery.
Follow instructions for DISCONNECTING AND CONNECTING BATTERY .
Observe notes on POWER SUPPLY/INTELLIGENT BATTERY SENSOR/BATTERY ELECTRONICS .

Necessary preliminary tasks:

Completely remove luggage compartment well trim (1) upward at an angle.

Fig 1: Identifying Luggage Compartment Well Trim

Courtesy of BMW OF NORTH AMERICA, INC.

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 2: Identifying IBS Nut

Courtesy of BMW OF NORTH AMERICA, INC.