1. Bookmark BMW resource links as they appear
2. M50d body trim -
http://www.realoem.com/bmw/enUS/part...50dX&mg=51
3. Specifically that trim -
http://www.realoem.com/bmw/enUS/show...diagId=51_A196
4. Also the part is finished in matte Cerium grey which doesn't match any other metal trim on non-M50d (M Performance vehicle). Might as well source the side mirror cap and grill to match.
5. Apply protectant on trim as those pieces are a pain in the ass to keep clean.