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Home >> BMW >> 2011 >> 740i >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System - Repair (N54, 2011-2012) >> Starter And Alternator Cables >> 12 42 500 Replacing battery positive lead between starter, alternator and battery positive terminal (N54)

12 42 500 Replacing battery positive lead between starter, alternator and battery positive terminal (N54)

Necessary preliminary tasks: 

Fold back cover (1).

Release nut underneath. Remove battery positive lead (2) from battery positive terminal.

Tightening torque 12 42 3AZ .

Fig 1: Identifying Positive Battery Cable Lead And Cover
G08469644Courtesy of BMW OF NORTH AMERICA, INC.

Remove protective cap (2) and release nut underneath.

Tightening torque 12 42 1AZ .

Disconnect battery positive lead (3) from alternator.

Fig 2: Identifying Battery Positive Lead, Protective Cap And Plug
G11164764Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Positive Battery Cable And Holder
G04755156Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (2).

Tightening torque 12 42 2AZ .

Remove battery positive lead from starter and feed out.

Fig 4: Identifying Starter Motor, Connector, Nuts And Screws
G06905177Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Add final details to vehicle.
Check stored fault messages.
Now clear the fault memory.