The water drain hoses for the slide/tilt sunroof are partially permanently integrated in the body and cannot be replaced individually.
These water drain hoses can only be completely replaced with extensive body repair work (e. g. after an accident).
An individual solution is required for damage that was not caused by an accident.
BMW X3 Service & Repair Manual > Control arms and struts: Removing and installing/replacing a steering stub/wheel carrier
Special tools required:
33 5 120
33 5 125
33 5 123
33 5 121
33 5 124
33 5 126
33 5 122
Necessary preliminary work:
Remove REAR WHEEL .
IMPORTANT: Expand anti-twist lock sufficiently to avoid damaging thread when releasing collar nut (1).
Activate parking brake and rel ...