This is a genuine BMW bush, part number 51 33 8 254 135. The number stamped on the part is 51338254135; BMW's catalog files it under the short number 8254135. You will find it on our Interior Body shelf, under Other Body equipment parts.
It fits the E46 coupe and convertible (323i, 325i, 328i, 330i and M3, 2000–2006), with the M52, M54, M56 or S54 engines — and the European-market versions.
BMW draws it on the Door Window Lifting Mechanism Front (51_3684) diagram. BMW's catalog calls for two of these at each place it is fitted. It weighs about 24 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.
