Genuine BMW part 21 52 1 160 291: Plug-in pipe. The number stamped on the part is 21521160291; BMW's catalog files it under the short number 1160291. You will find it on our Clutch & Flywheel shelf, under Clutch control (hydraulics).
It fits every E36 body style (318i, 318ti, 320i, 325i, 328i and M3, 1992–1999), with the M42, M43, M44, M50, M52 or S50 and other engines — and the European-market versions.
BMW draws it on the Clutch control (21_0289) diagram. It weighs about 75 g (0.2 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.