Genuine BMW part 24 21 7 513 337: Repair kit, output flange nut. The number stamped on the part is 24217513337; BMW's catalog files it under the short number 7513337. You will find it on our Transmission shelf, under Input, intermediate and output shafts. It supersedes the older numbers 1423569 and 7503876, so a part carrying any of them is the same part.
It fits every E46 body style (320i, 323i, 325i, 328i and 330i, 1999–2006), with the M52 or M54 engines — and the European-market versions.
BMW draws it on 4 diagrams, among them A5S360R/390R Output (24_0933) and A4S200R output (24_0977). It weighs about 85 g (0.2 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.