Ultrasonic transducer, Laguna Seca Blau — a genuine BMW part, number 66 20 6 913 937. The number stamped on the part is 66206913937; BMW's catalog files it under the short number 6913937. You will find it on our Instruments & Electronics shelf, under Cruise control.
It fits the E46 coupe, convertible, touring and compact (323i, 325i, 328i, 330i and M3, 2000–2006), with the M52, M54, M56 or S54 engines — and the European-market versions.
BMW draws it on 3 diagrams, among them Ultrasonic-sensor (66_0228) and Ultrasonic-sensor (66_0273). It weighs about 30 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.
