This is a genuine BMW intermediate piece f floor heater duct, part number 51 16 8 234 446. The number stamped on the part is 51168234446; BMW's catalog files it under the short number 8234446. You will find it on our Interior Body shelf, under Mirrors, trims, storage compartments.
It fits every E46 body style (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 Floor covering (51_3255) diagram. It weighs about 20 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.
