Clamp lower — a genuine BMW part, number 18 20 1 440 289. The number stamped on the part is 18201440289; BMW's catalog files it under the short number 1440289. You will find it on our Exhaust shelf, under Exhaust system, rear.
It fits the E46 sedan, coupe, convertible and touring (320i, 323i, 325i, 328i and 330i, 1999–2006), with the M52, M54 or M56 engines.
BMW draws it on 4 diagrams, among them Suspension parts exhaust (18_0330) and Catalytic converter/front silencer (18_0442). It weighs about 170 g (0.4 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.