This is a genuine BMW bracket for lambda probe cable, part number 23 13 1 282 524. The number stamped on the part is 23131282524; BMW's catalog files it under the short number 1282524. You will find it on our Transmission shelf, under Other Manual gearbox parts.
It fits every E36 body style (318i and 318ti, 1992–1999), with the M43 or M44 engines — and the European-market versions. It also fits every E46 body style (316i, 316i 1.6, 316i 1.9, 316ti, 318i and 318ti, 1997–2004), with the M43, N40, N42, N45 or N46 engines.
BMW draws it on 4 diagrams, among them Lambda Probe Fixings (18_0643) and Gearbox parts - lambda probe holder (23_0720). It weighs about 20 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.