This is a genuine BMW diaphragm spring, part number 11 36 1 403 550. The number stamped on the part is 11361403550; BMW's catalog files it under the short number 1403550. You will find it on our Engine shelf, under Other Engine parts.
It fits every E36 body style (320i, 323i, 325i, 328i and M3, 1992–1999), with the M50, M52, S50 or S52 engines — and the European-market versions.
BMW draws it on 6 diagrams, among them timing gear timing chain top (11_1437) and timing gear timing chain top (11_1541). It weighs about 24 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.
