BMW X3 Service & Repair Manual > Starter with mounting: Removing and installing/replacing starter motor (N47 D20 O1)
Necessary preliminary tasks:
Switch off ignition.
Disconnect BATTERY NEGATIVE LEAD .
Remove REINFORCEMENT PLATE .
Release nut (1) and remove cable.
Release nut (2) and remove the positive battery cable.
Release cable at clamp (3) from starter motor.
Release screws (1), (2) and (3 ...