Micro-switch trunk lid lock — a genuine BMW part, number 61 31 8 363 693. The number stamped on the part is 61318363693; BMW's catalog files it under the short number 8363693. You will find it on our Electrical shelf, under Switch.
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 2 diagrams, among them Trunk Lid/Closing System (41_0810) and Various Micro Switches (61_0075). 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.