Locking pin — a genuine BMW part, number 35 31 1 158 661. The number stamped on the part is 35311158661; BMW's catalog files it under the short number 1158661. You will find it on our Brakes shelf, under Other Pedals parts.
It fits every E36 body style (323i, 325i, 328i and M3, 1992–1999), with the M50, M52, S50 or S52 engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Pedals-supporting bracket/clutch pedal (35_0254) and Pedals-supporting bracket/clutch pedal (35_0454). 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.