Genuine BMW part 52 10 7 008 129: Left lordosis pad. The number stamped on the part is 52107008129; BMW's catalog files it under the short number 7008129. You will find it on our Interior Body shelf, under Tail trim.
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 2 diagrams, among them Front Seat Backrest Frame/Rear Panel (52_2578) and Seat, front, electrical system & drives (52_3118). It weighs about 140 g (0.3 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
