12 42 510 Replacing battery positive lead (between starter motor and battery positive support point) (M54)

Read fault memory. Switch off ignition.

Observe safety instructions for handling vehicle battery, refer to 61 00... SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .

Remove front splash guard.

Follow instructions for disconnecting and connecting battery, refer to 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .

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

Remove cover from fuel injectors.

Fold back protective cap (1).

Fig 1: Identifying Protective Cap

Courtesy of BMW OF NORTH AMERICA, INC.

Release nut.

Remove battery positive lead from support point.

Release nut (1).

Installation:

Disconnect battery positive lead (2) from starter motor.

Remove battery positive lead.

Fig 2: Disconnecting Battery Positive Lead From Starter Motor

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Interrogate fault memory of DME control module.
Check stored fault messages.
Rectify faults.
Then clear fault memory.