Genuine BMW part 51 21 8 216 129: Base, lock cylinder, left. The number stamped on the part is 51218216129; BMW's catalog files it under the short number 8216129. You will find it on our Interior Body shelf, under Other Body equipment parts.
It fits the E46 sedan, coupe, convertible and touring (320i, 323i, 325i, 328i, 330i and M3, 1999–2006), with the M52, M54, M56 or S54 engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Door mechanism front (up to 09/00) (41_1111) and Door mechanism rear (up to 09/00) (41_1112). 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.
