12 42 510 Replacing battery positive lead (between starter and B+ terminal) (S65)

WARNING: This page is about a different car, the 2011 BMW M3, 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.

Read fault memory. Switch off ignition

Observe SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .

OBSERVE INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .

Disconnect battery negative lead from battery and lay to one side.

Necessary preliminary tasks

REMOVE INTAKE AIR MANIFOLD .

Release and raise cable duct for engine wiring harness; refer to REMOVING ENGINE WIRING HARNESS

Release nut (2) on B+ lead.

Remove B+ leads.

Installation:

Tightening torque, 12 41 1AZ

Fig 1: Identifying Nut

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Release clamp for B+ lead on cylinder no. 4.

Unclip lead from cable holders.

Fig 2: Unclipping Lead From Cable Holders

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Remove cover from B+ terminal. Unfasten nut. Remove B+ lead.

Installation:

Tightening torque, 12 42 1AZ

Fig 3: Identifying Battery Positive Lead On Battery Positive Terminal

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NOTE: Assemble engine.

Interrogate fault memory of DME control unit.

Check stored fault messages.

Rectify faults and clear fault memory.