Cage nut — a genuine BMW part, number 07 12 9 926 520. The number stamped on the part is 07129926520; BMW's catalog files it under the short number 9926520. You will find it on our Supplies & Hardware shelf, under Group 12.
It fits the E46 sedan, coupe, convertible and touring (320i, 323i, 328i, 330i and M3, 1999–2006), with the M52, M54 or S54 engines — and the European-market versions.
BMW draws it on 2 diagrams, among them DSC compressor/senors/mounting parts (34_0958) and DSC compressor/senors/mounting parts (34_1132). It weighs about 8 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.
