This is a genuine BMW contr.panel switch unit light/fog light, part number 61 31 8 378 572. The number stamped on the part is 61318378572; BMW's catalog files it under the short number 8378572. You will find it on our Electrical shelf, under Switch.
It fits every E46 body style (320i, 323i, 325i and 328i, 1999–2006), with the M52 or M54 engines — and the European-market versions.
BMW draws it on 4 diagrams, among them Retrofit kit M aerodyn. package (03_0791) and Installing Set Fog Lamps (03_2223). It weighs about 78 g (0.2 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
