61 12 002 Replacing Positive Battery Cable (From Battery To Luggage Compartment Connector)

WARNING: This page is about a different car, the 2007 BMW 550i and 2006 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

Observe SAFETY INSTRUCTIONS for handling vehicle battery.

Necessary preliminary tasks:

Remove LEFT LUGGAGE COMPARTMENT WHEEL ARCH TRIM
Remove RIGHT LUGGAGE COMPARTMENT WHEEL ARCH TRIM
Disconnect battery negative lead

Security version:

Remove PROTECTIVE COVER from distribution box/battery positive terminal (luggage compartment)

Lever out clips (1).

Release plastic nuts (2).

Remove underlay for luggage compartment floor panel (3).

Fig 1: Identifying Luggage Compartment Floor Panel, Plastic Nuts And Clips

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Disconnect plug connection (1).

Disconnect plug connection (3) of IBS cable.

Unlock cable lug mounting and fold back.

Unscrew nut (2).

Tightening torque: 61 21 4AZ . See BATTERY WITH TERMINAL for specs.

Remove positive battery cable.

Unscrew nut (5).

Tightening torque: 61 21 1AZ . See BATTERY WITH TERMINAL for specs.

IMPORTANT:

Do not under any circumstances pull/lever safety battery terminal (4) off by force.

Fig 2: Identifying IBS Cable, Plug Connection And Nut

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Pull safety battery terminal (4) upwards and remove.

Open cable lug mounting (1).

Release screw (2).

Tightening torque: 61 12 3AZ . See AUXILIARY CABLES/LEADS for specs.

Unclip and remove positive battery cable (3).

Fig 3: Identifying Cable Lug Mounting, Positive Battery Cable And Screw

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WARNING:

Risk of short circuits!

During installation, make sure that

Cable lug mounting (1) is correctly seated on positive battery cable (3)
Screw is properly connected.

Unclip positive battery cable (1) from cable guides (2) and remove.

Fig 4: Identifying Lug Mounting And Battery

Courtesy of BMW OF NORTH AMERICA, INC.