This is a genuine BMW hexagon screw with flange, part number 23 31 7 525 540. The number stamped on the part is 23317525540; BMW's catalog files it under the short number 7525540. You will find it on our Transmission shelf, under Inner gearshift parts.
It fits every E36 body style (318i, 318ti, 320i, 323i and 325i, 1992–1999), with the M40, M42, M43, M44, M50 or M52 engines — and the European-market versions. It also fits the E46 sedan and coupe (316i, 1999–2004), with the M43, N40, N42 or N45 engines.
BMW draws it on 5 diagrams, among them S5D...G inner gear shifting parts (23_0128) and S5D...G inner gear shifting parts (23_0227). It weighs about 7 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.
