This is a genuine BMW crash alarm relay, part number 61 35 1 384 761. The number stamped on the part is 61351384761; BMW's catalog files it under the short number 1384761. You will find it on our Electrical shelf, under Control units, modules. BMW has since replaced it with 8364692.
It fits the E36 sedan, coupe and convertible (318i, 320i, 325i and M3, 1992–1999), with the M40, M42, M43, M50, M52 or S50 engines — and the European-market versions.
BMW draws it on 3 diagrams, among them Various Relays (61_0066) and Various Relays (61_0571). It weighs about 30 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.