Bimmerworld shipped me the wrong belt and doesn’t want it returned. Here is the link to the part on their site. Looks like the most common application is M52TU or M54 e46.
https://www.bimmerworld.com/Serpentine- ... 7-450.html
If interested please PM me. Free to first person who wants to come by and pick it up (Hunterdon County)
Bill