12 42 540 Replacing Safety Battery Terminal (SBK)

WARNING: This page is about a different car, the 2008 BMW 760Li and 2007 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Comply with safety regulations! See 72 00 ... SAFETY REGULATIONS FOR HANDLING COMPONENTS WITH GAS GENERATORS .

Investigate cause of safety battery terminal being triggered.

To do so, read fault memory of airbag control unit. Note down fault messages stored in memory. Rectify faults.

Now clear the fault memory.

Necessary preliminary tasks:

Remove luggage compartment floor trim panel . See 51 47 101 REMOVING AND INSTALLING/REPLACING LUGGAGE COMPARTMENT FLOOR TRIM PANEL .
Remove spare wheel cover.
Remove spare wheel.
Remove right luggage compartment wheel arch trim . See 51 47 161 REMOVING AND INSTALLING/REPLACING RIGHT LUGGAGE COMPARTMENT WHEEL ARCH TRIM .
Remove jack.
Remove right luggage compartment mat underlay.
Follow instructions for disconnecting and connecting battery . See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Disconnect battery negative lead and cover.
Unlock battery positive terminal cover in luggage compartment and lift out.

NOTE: The safety battery terminal is replaced with the cable up to the battery positive terminal in the luggage compartment and up to the power module.

Release battery positive terminal (1).

Release nut at terminal (2).

Unlock and detach plug connection (3).

Unlock positive lead (4) at power module and detach.

Remove safety battery terminal (5) with positive lead.

Installation:

Check routing of cables.

Fig 1: Identifying Battery Positive Terminal, Nut & Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

If necessary, replace faulty fuses.