Starter Motor: Service and Repair

Removing And Installing/Replacing Starter Motor (S54)

Observe instructions for disconnecting and connecting battery.
Disconnect battery negative lead from battery.
Remove rear underbody protection.


Remove reinforcement plate on front axle support.


CAUTION: The section "Removing and installing reinforcement plate on front axle support" contains important installation instructions.







NOTE: For a better overview, this work step is shown from above and without the intake air manifold. Do not remove intake air manifold and carry out work from below.


Release nuts.

Installation Note: Tightening torque:





Disconnect battery positive leads (1 and 2) from starter motor.
Disconnect lead (3) from starter motor.


NOTE: For a better overview, the illustrations of other BMW cars are used for the following work steps.







Releasing both starter motor mounting bolts (1) on transmission:
Release starter motor screws from transmission output end with a long extension and universal joints.

Installation Note: Tightening torque:











Withdraw starter motor (1) from transmission flange and remove towards bottom.







Installation:
Check starter motor pinion and ring gear for damage.