12 41 020 Removing and installing/replacing starter (N52K)

WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Aluminium-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
Remove INTAKE AIR MANIFOLD

Unlock plug (1) and remove.

Unfasten nut.

Tightening torque 12 42 2AZ .

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 .

Unfasten screws (2).

Installation:

Replace aluminum screws.

Tightening torque 12 41 2AZ .

Remove starter motor (3).

Fig 2: Identifying Starter Motor And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Assemble engine.