This is a genuine BMW switch, part number 65 71 1 363 257. The number stamped on the part is 65711363257; BMW's catalog files it under the short number 1363257. You will find it on our Instruments & Electronics shelf, under Cruise control.
It fits the E36 sedan, coupe and compact (318i, 318ti, 320i, 323i, 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 3 diagrams, among them Bumper, front (51_3892) and Cruise control (66_0068). BMW lists the quantity used as “as required”. It weighs about 145 g (0.3 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.