This is a genuine BMW emergency operation crank, part number 67 61 8 370 817. The number stamped on the part is 67618370817; BMW's catalog files it under the short number 8370817. You will find it on our Instruments & Electronics shelf, under Other Electric drive unit/system parts.
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. It also fits the E46 convertible (323i, 325i, 330i and M3, 2000–2006), with the M52, M54 or S54 engines — and the European-market versions.
BMW draws it on 3 diagrams, among them Softtop, electromech. all-autom (54_0199) and Folding top (54_0274). It weighs about 12 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.