61 20 900 Disconnecting and connecting battery negative lead
WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. 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
IMPORTANT:
Do not under any circumstances use force to pull/lever off Intelligent Battery Sensor (IBS).
Necessary preliminary tasks:
Loosen nut (1).
For tightening torque refer to 61 21 1AZ in 61 21 BATTERY WITH TERMINAL .
Disconnect battery negative lead (3) and secure at side.