This is a genuine BMW rubber-fastener for surfboard carrier, part number 82 12 9 413 114. The number stamped on the part is 82129413114; BMW's catalog files it under the short number 9413114. You will find it on our Merchandise & Accessories shelf, under Other Universal Accessories parts.
It fits the E36 sedan, coupe and convertible (318i, 320i, 323i, 325i, 328i and M3, 1992–1999), with the M40, M42, M43, M44, M50 or M52 and other engines — and the European-market versions.
BMW draws it on 12 diagrams, among them Surfboard rack (03_3282) and Surfboard rack (03_3283). 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.