61 12 013 Replacing negative battery lead
WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Observe SAFETY INFORMATION FOR HANDLING VEHICLE BATTERY .
Read and comply with notes on INTELLIGENT BATTERY SENSOR (IBS) .
Necessary preliminary work:
Loosen nut (1).
Tightening torque 61 21 1AZ .
IMPORTANT:
Do not under any circumstances use force to pull off negative terminal.
Detach battery earth lead with intelligent battery sensor (IBS) in upward direction, lay to one side and secure.
Unfasten plug connection (2) and disconnect.
Release nut (3) and battery earth lead (4).
Tightening torque 61 12 5AZ .