Corrugated washer — a genuine BMW part, number 11 36 1 436 674. The number stamped on the part is 11361436674; BMW's catalog files it under the short number 1436674. You will find it on our Engine shelf, under Other Engine parts.
It fits every E46 body style (320i, 323i, 325i, 328i and 330i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Valve train, timing chain, upper/intake (11_2171) and Valve train, timing chain, upper/intake (11_6210). It weighs about 20 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.
