Owner's manual, radio/navigation — a genuine BMW part, number 01 49 0 156 314. The number stamped on the part is 01490156314; BMW's catalog files it under the short number 0156314. You will find it on our Supplies & Hardware shelf, under Other Technical Literature parts.
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 Radio navigation E46, SA606 (01_0090) diagram. It weighs about 131 g (0.3 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.