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Home >> BMW >> 2011 >> 1M >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair >> Starter Lead >> 12 42 500 Replacing positive battery cable between starter motor, alternator and positive battery connection point (N54T, N55)

12 42 500 Replacing positive battery cable between starter motor, alternator and positive battery connection point (N54T, N55)

Necessary preliminary tasks: 

Remove protective cap (not shown).

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

Tightening torque 12 42 3AZ .

Fig 1: Locating Positive Battery Cable Screw
G04751340Courtesy of BMW OF NORTH AMERICA, INC.

Remove protective cap and release nut underneath.

Tightening torque 12 42 1AZ .

Disconnect positive battery cable (1) from alternator.

Fig 2: Locating Positive Battery Cable Nut From Alternator
G04755154Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (1) and remove.

Unfasten nut.

Tightening torque 12 42 2AZ .

Disconnect positive battery cable (2) from starter motor.

Fig 3: Locating Positive Battery Cable Nut From Starter Motor
G04755155Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 4: Identifying Positive Battery Cable From Holder
G04755156Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Check stored fault messages.
Delete fault memory.