Reluctor — a genuine BMW part, number 11 21 7 787 237. The number stamped on the part is 11217787237; BMW's catalog files it under the short number 7787237. You will find it on our Engine shelf, under Crankshaft with bearing.
It fits every E46 body style (318d, 318td, 320d, 320td and 330d, 2001–2005), with the M47N or M57N engines.
BMW draws it on 3 diagrams, among them Engine block mounting parts (11_3307) and Engine block mounting parts (11_3420). It weighs about 90 g (0.2 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.