This is a genuine BMW window guide rail right, part number 51 32 8 176 366. The number stamped on the part is 51328176366; BMW's catalog files it under the short number 8176366. You will find it on our Interior Body shelf, under Other Body equipment parts.
It fits the E36 sedan and touring (318i, 320i, 325i, 328i and M3, 1992–1999), with the M40, M42, M43, M44, M50 or M52 and other engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Front Door-Hinge/Door Brake (41_0811) and Door Window Lifting Mechanism Front (51_2055). It weighs about 133 g (0.3 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
