Genuine BMW part 11 27 7 505 697: Torx bolt. The number stamped on the part is 11277505697; BMW's catalog files it under the short number 7505697. You will find it on our Engine shelf, under Compensating shaft.
It fits every E46 body style (316i, 316ti, 318i and 318ti, 2001–2004), with the N40, N42, N45 or N46 engines.
BMW draws it on 3 diagrams, among them Oil pump and compensating shaft unit (11_3190) and Lubrication system/Oil pump (11_3713). It weighs about 20 g (under 0.1 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.