This is a genuine BMW starter interlock relay, part number 61 35 8 364 175. The number stamped on the part is 61358364175; BMW's catalog files it under the short number 8364175. You will find it on our Electrical shelf, under Control units, modules. It supersedes the older number 8362102, so a part carrying that number is the same part.
It fits every E36 body style (318i, 318ti, 320i, 323i, 325i and 328i, 1992–1999), with the M42, M43, M44, M50 or M52 engines — and the European-market versions.
BMW draws it on 4 diagrams, among them Various Relays (61_0926) and Relay, starter interlock (61_4510). It weighs about 49 g (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.