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:
Unlock connector (1) and remove.
Unfasten nut.
Remove positive battery cable (2).
Release screw (1).
Installation note:
Replace aluminum screws.
Unfasten screws (2).
Installation note:
Replace aluminum screws.
Remove starter motor (3).
Installation note:
Check starter pinion and ring gear for damage. Replace starter motor if necessary.
Assemble engine.
Only during starter replacement and on vehicles with MSA (automatic engine start-stop function):
BMW X3 Service & Repair Manual > Troubleshooting: Notes on handling wiring harnesses and cables
The following applies in general:
To avoid damage, observe the following instructions:
Avoid compressive and tensile loads
To ensure professional repairs, perform repair work only with BMW-approved or recommended special
tools and spare parts
Make sure cables are laid without kinks or abr ...