Plug-in socket — a genuine BMW part, number 86 19 0 001 048. The number stamped on the part is 86190001048; BMW's catalog files it under the short number 0001048. You will find it on our Instruments & Electronics shelf, under Group 19.
It fits every E36 body style (318i, 318ti, 320i, 323i, 325i and 328i, 1992–1999), with the M40, M42, M43, M44, M50 or M52 engines — and the European-market versions.
BMW draws it on 5 diagrams, among them Trailer, indiv. parts, electr. system (03_3815) and Trailer, indiv. parts, electr. system (03_3816). It weighs about 26 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.