This is a genuine BMW bow, part number 84 13 6 904 153. The number stamped on the part is 84136904153; BMW's catalog files it under the short number 6904153. You will find it on our Instruments & Electronics shelf, under Other Communication systems parts.
It fits the E46 sedan, coupe and touring (320i, 323i, 325i, 328i, 330i and M3, 1999–2006), with the M52, M54 or S54 engines — and the European-market versions.
BMW draws it on the Single parts, SA 627, trunk (84_0117) diagram. It weighs about 254 g (0.6 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.