This is a genuine BMW operating rod, part number 51 22 1 960 839. The number stamped on the part is 51221960839; BMW's catalog files it under the short number 1960839. 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 the Locking system, door, rear (41_0941) diagram. It weighs about 8 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.