Stopper left — a genuine BMW part, number 51 25 8 171 801. The number stamped on the part is 51258171801; BMW's catalog files it under the short number 8171801. You will find it on our Interior Body shelf, under Locks.
It fits the E36 convertible (318i, 323i, 325i, 328i and M3, 1994–1999), with the M42, M43, M44, M50, M52 or S50 and other engines — and the European-market versions.
BMW draws it on the Manual Folding Top Flap Mechanism (41_0850) diagram. It weighs about 15 g (under 0.1 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
