Genuine BMW part 61 31 8 378 577: control, switch unit for lights. The number stamped on the part is 61318378577; BMW's catalog files it under the short number 8378577. You will find it on our Electrical shelf, under Switch.
It fits the E46 sedan, coupe, convertible and touring (320i, 323i, 325i, 328i, 330i and M3, 1999–2006), with the M52, M54, M56 or S54 engines.
BMW draws it on the Switch unit, light (61_1060) diagram. It weighs about 69 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.
