12 42 540 Replacing safety battery terminal (SBK)

WARNING: This page is about a different car, the 2005 BMW Z4, 2004 BMW Z4, and 2003 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Comply with safety regulations!
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 TRIMS .
Follow instructions for Instructions For Disconnecting And Connecting Battery .
Disconnect battery negative lead and cover.
Loosen electrical system cable.
Remove battery.

NOTE: The safety battery terminal is replaced together with a complete cable up to the battery positive terminal in the engine compartment.

Unlock cover on terminal and remove.

Unlock both plug connections (1) and disconnect.

Release nut on electrical system cable (2).

Fig 1: Disconnecting Plug Connection (1 Of 2)

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Unclip plug connection (1), unlock and disconnect.

Release nut on electrical system cable (2).

Fig 2: Disconnecting Plug Connection (2 Of 2)

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Remove left rear wheel .

Release screws on cover frame (1).

Unscrew nuts (2).

Feed battery positive lead out of battery well.

Fig 3: Releasing Cover Frame Screws

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Fig 4: Cutting Cable Ties

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Cut through cable ties (1).

Unlock holder (2) and unclip positive lead.

Release nut (3) and remove holder.

Compress holder (4) and detach.

If necessary, unclip plastic line (1).

If necessary, unclip brake lines (2).

If necessary, release lead (3) from ABS sensor and disconnect.

Fig 5: Releasing Leads From ABS sensor

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Feed out battery positive lead in direction of battery well to right and remove.

Installation:

If necessary, replace faulty fuses.