Retarding relay — a genuine BMW part, number 12 63 1 740 280. The number stamped on the part is 12631740280; BMW's catalog files it under the short number 1740280. You will find it on our Electrical shelf, under Other Engine Electrical System parts.
It fits every E36 body style (318i, 318ti, 320i, 323i and 325i, 1992–1999), with the M40, M42, M43, M44, M50 or M52 engines — and the European-market versions.
BMW draws it on 2 diagrams, among them Relay Motor (12_0596) and Relay, delay (61_4503). It weighs about 53 g (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.
