61 12 004 Replacing battery positive lead (from luggage compartment connector to engine bulkhead connector)

WARNING: This page is about a different car, the 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with notes on handling wiring harnesses and cables.

Necessary preliminary tasks:

Remove battery
Remove fuel tank . See 16 11 030 REMOVING AND INSTALLING OR REPLACING FUEL TANK (PETROL/GASOLINE) .
Partially remove front right wheel arch trim . See 51 71 039 REMOVING AND INSTALLING/REPLACING FRONT LEFT OR RIGHT WHEEL ARCH COVER (REAR SECTION) .
Remove cover from electronics box . See 12 90... REMOVING AND INSTALLING/REPLACING ELECTRONICS BOX .

Work is shown on the E82 N52N by way of example. There may be differences in detail in the case of other vehicle models.

Unclip covers (1) and release nuts underneath. Tightening torque, see 61 12 1AZ in 61 12 AUXILIARY CABLE .

Disconnect battery positive leads (2).

Fig 1: Identifying Covers And Battery Positive Leads

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Turn clamping rings (1) in direction of arrow and remove.

Installation:

Make sure clamping rings (1) are correctly seated.

Fig 2: Turning Clamping Rings

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Remove battery positive lead (1) from luggage compartment floor (2).

Fig 3: Identifying Battery Positive Lead And Luggage Compartment Floor

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Release bolt (1) and nut (2).

Remove cover (3).

Fig 4: Identifying Bolt, Nut And Cover

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Release holder (1) from body.

Feed out battery positive leads (2) and vent line (4) from holder (1).

Release retaining clips (3) and remove vent line (4) from cover (5).

Release all nuts and remove cover (5).

Fig 5: Identifying Battery Positive Leads, Vent Line, Holder And Cover

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Release attachment points for battery positive lead (1) from body.

Fig 6: Identifying Battery Positive Lead Attachment Points

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NOTE: Electronics box shown removed for purposes of clarity.

Unclip cover cap (1).

Release nuts underneath.

Tightening torque, see 61 12 1AZ in 61 12 AUXILIARY CABLE .

Remove positive battery cable.

Fig 7: Identifying Cover Cap

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Release wiring harness holder (1).

Feed out battery positive lead in direction of arrow.

Fig 8: Identifying Wiring Harness Holder

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