Necessary preliminary work:
Fold back cover (1).
Release nut underneath. Remove positive battery cable from positive battery connection point.
Release battery positive lead (1) from retainers (2).
Release clamp (1).
Release clamps (2).
Unlock tab (3) in direction of arrow. Remove top part of cable holder toward the top and uncover wiring harnesses.
Unfasten nut.
Disconnect positive battery cable (2) from starter motor.
Remove protective cap (2) and release nut underneath.
Remove battery positive lead from alternator and feed out.
NOTE: Reassemble the vehicle.
Check stored fault messages.
Delete fault memory.
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 ...