What causes damage flywheel on bmw is it common fault

Damaged fly wheels are very rare on most vehicles
On a manual transmission vehicle , it will be from slipping clutch, worn clutch plate and the fix there is to remove and machine the flywheel
if you are referring to the ring gear for the starter motor , it gets damaged in set spots from starter pinion engagement , from incorrect number of teeth of the new starter motor
the fix here is to remove the ring gear from the flywheel and fit a new one
If it is an auto transmission besides the teeth problem , the flex plate ( not actually a flywheel) cracks and breaks off the crankshaft bolts
fix here is a new flex plate as it fixes both the teeth problem and the broken flex plate
flex plate failure is common with auto transmissions caused from incorrectly fitted torque converters , faulty torque converters or from the auto transmission being allowed to hang of the flex plate during removal / refitting process

-you mean broken teeth...? If so possibly crank the engine while it's still running.


Good Luck


Mai