This is a genuine BMW roll-over sensor, part number 61 35 8 372 869. The number stamped on the part is 61358372869; BMW's catalog files it under the short number 8372869. You will find it on our Electrical shelf, under Control units, modules. It supersedes the older numbers 6924290 and 8357698, so a part carrying any of them is the same part.
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 the Body Control Units and Modules (61_4881) diagram. It weighs about 457 g (1.0 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.