Moulding, folding top lid — a genuine BMW part, number 51 17 7 010 325. The number stamped on the part is 51177010325; BMW's catalog files it under the short number 7010325. You will find it on our Interior Body shelf, under Bumper, rear.
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 the Folding top compartment lid (41_1348) diagram. It weighs about 600 g (1.3 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.