This is a genuine BMW sound absorber, part number 51 71 8 204 893. The number stamped on the part is 51718204893; BMW's catalog files it under the short number 8204893. 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 and 325i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Park Distance Control (PDC) (66_0003) and Single Parts F Emergency Wheel Mounting (71_0123). 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.
