FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Starter Motor: Service and Repair



12 41 020 Removing And Installing/replacing Starter (N52, N52K, N51, N53)







IMPORTANT:
Aluminium magnesium materials.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminium screws/bolts exclusively.

Aluminium screws/bolts must be replaced each time they are released.

Aluminium screws/bolts are permitted with and without colour coding (blue).

For reliable identification:

Aluminium screws/bolts are not magnetic.

Jointing torque and angle of rotation must be observed without fail (risk of damage).







Necessary preliminary tasks:
- Turn off ignition
- Disconnect battery negative lead
- Remove intake plenum







Unlock plug (1) and remove.

Unfasten nut.

Tightening torque 12 41 3AZ.

Remove battery positive lead (2).







Release screw (1).

Installation:
Replace aluminium screws.

Tightening torque 12 41 1AZ.

Unfasten screws (2).

Installation:
Replace aluminium screws.

Tightening torque 12 41 2AZ.

Remove starter motor (3).







Installation:
Check starter pinion and ring gear for damage. Replace starter if necessary.

N53 Only: In the case of a separate term. 50 lead (with disconnector socket), the term. 50 lead is laid parallel to knock sensor 2 behind the fuel line.