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Home >> BMW >> 2017 >> X3 xDrive28d >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Electrical System - Repair >> Starter Lead >> 12 42 500 Replacing battery positive lead between starter, alternator and battery positive terminal (N52T)

12 42 500 Replacing battery positive lead between starter, alternator and battery positive terminal (N52T)

Necessary preliminary work: 

Fold back cover (1).

Release nut underneath. Remove positive battery cable from positive battery connection point.

Tightening torque, 12 42 3AZ .

Fig 1: Identifying Back Cover Of Positive Battery Cable
G09943581Courtesy of BMW OF NORTH AMERICA, INC.

Release battery positive lead (1) from retainers (2).

Fig 2: Identifying Battery Positive Lead And Retainers
G09914262Courtesy of BMW OF NORTH AMERICA, INC.

Release clamp (1).

Release clamps (2).

Unlock tab (3) in direction of arrow. Remove top part of cable holder toward the top and uncover wiring harnesses.

Fig 3: Releasing Clamp
G09914263Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten nut.

Tightening torque 12 42 2AZ .

Disconnect positive battery cable (2) from starter motor.

Fig 4: Locating Positive Battery Cable Nut
G04751335Courtesy of BMW OF NORTH AMERICA, INC.

Remove protective cap (2) and release nut underneath.

Tightening torque 12 42 1AZ .

Remove battery positive lead from alternator and feed out.

Fig 5: Identifying Protective Cap, Alternator And Nut
G06905166Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Reassemble the vehicle.
Check stored fault messages.
Delete fault memory.