Cover, lock wedge — a genuine BMW part, number 51 21 8 226 578. The number stamped on the part is 51218226578; BMW's catalog files it under the short number 8226578. 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 and 330i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 4 diagrams, among them Door mechanism front (up to 09/00) (41_1111) and Door mechanism rear (up to 09/00) (41_1112). BMW's catalog calls for two of these at each place it is fitted. It weighs about 8 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.
