12 42 500 Replacing battery positive lead (between starter, alternator and battery positive terminal)

Necessary preliminary tasks:

Remove protective cap (not shown).

Release screw, remove battery positive lead (1) from battery positive terminal.

Tightening torque 12 42 3AZ, see 12 42 ALTERNATOR LEAD .

Fig 1: Identifying Battery Positive Lead On Battery Positive Terminal

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Remove protective cap and release nut underneath.

Tightening torque 12 42 1AZ, see 12 42 ALTERNATOR LEAD .

Disconnect battery positive lead (1) from alternator.

Fig 2: Identifying Battery Positive Lead On Alternator

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Unfasten nut.

Tightening torque 12 42 2AZ, see 12 42 ALTERNATOR LEAD .

Disconnect battery positive lead (2) from starter motor.

Fig 3: Identifying Plug And Battery Positive Lead

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Unclip battery positive lead (1) from holder (2) and remove.

Fig 4: Identifying Battery Positive Lead And Holder

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NOTE: Check stored fault messages.
Now clear the fault memory.