The carrier bolt is #3 in the link below:
RealOEM.com - Online BMW Parts Catalog

Once you dremel the bolt's head off, the carrier can be removed.
Now you end up with a stud. With heat, Vise-grips etc., it will come off.

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1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT