Steptronic switch — a genuine BMW part, number 51 16 8 171 666. The number stamped on the part is 51168171666; BMW's catalog files it under the short number 8171666. You will find it on our Interior Body shelf, under Mirrors, trims, storage compartments.
It fits the E46 sedan, coupe and touring (320i, 323i, 325i, 328i and 330i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 5 diagrams, among them Mounting parts, centre console (51_2159) and Mounting parts, centre console (51_2265). It weighs about 21 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.
