Repair part, insert, rear axle support — a genuine BMW part, number 41 00 7 030 266. The number stamped on the part is 41007030266; BMW's catalog files it under the short number 7030266. You will find it on our Exterior Body shelf, under Other Bodywork parts. BMW has since replaced it with 7000246.
It fits the E46 sedan, coupe, convertible and touring (320i, 323i and 325i, 1999–2006), with the M52, M54 or M56 engines — and the European-market versions.
BMW draws it on the Rear Wheelhouse/Floor Parts (41_1267) diagram. It weighs about 4.8 kg (11 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.