12 41 020 Removing and installing/replacing starter (N52, N52K, N51, N53, N54)

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary tasks:

Switch off ignition
Clamp off battery negative lead , see 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD .
Remove intake air manifold , see 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (N54) .

Unlock plug (1) and remove.

Unfasten nut.

Tightening torque 12 41 3AZ , see 12 41 STARTER MOTOR WITH MOUNTING .

Remove battery positive lead (2).

Fig 1: Identifying Plug And Battery Positive Lead

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Installation:

Replace aluminum screws.

Tightening torque 12 41 1AZ , see 12 41 STARTER MOTOR WITH MOUNTING .

Release screws (2).

Installation:

Replace aluminum screws.

Tightening torque 12 41 2AZ , see 12 41 STARTER MOTOR WITH MOUNTING .

Remove starter motor (3).

Fig 2: Identifying Screws And Starter Motor

Courtesy of BMW OF NORTH AMERICA, INC.

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.