This is a genuine BMW set spring washer 20, part number 07 50 9 064 025. The number stamped on the part is 07509064025; BMW's catalog files it under the short number 9064025. You will find it on our Supplies & Hardware shelf, under Group 50.
It fits the E46 convertible (323i, 325i, 330i and M3, 2000–2006), with the M52, M54 or S54 engines — and the European-market versions.
BMW draws it on 4 diagrams, among them Battery tray (51_3277) and Sliding Roof Control (54_0221). It weighs about 18 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.
