Genuine BMW part 36 11 8 378 681: Wheel electronics module, RDC. The number stamped on the part is 36118378681; BMW's catalog files it under the short number 8378681. You will find it on our Wheels & Tires shelf, under Other Wheels parts. BMW has since replaced it with 2360419.
It fits every E46 body style (320i, 323i, 325i, 328i and 330i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on 4 diagrams, among them Tire pressure control (RDC) - ctrl unit (36_0317) and Tire pressure control (RDC) - ctrl unit (36_0384). It weighs about 40 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.
