Genuine BMW part 24 53 1 219 286: Retainer spring. The number stamped on the part is 24531219286; BMW's catalog files it under the short number 1219286. You will find it on our Transmission shelf, under Other Automatic transmission 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. It also fits every E46 body style (320i, 323i and 325i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 5 diagrams, among them A5s310z Parking Lock (24_0712) and A5s325z Parking Lock (24_0891). It weighs about 10 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.