Hex Bolt — a genuine BMW part, number 11 23 7 503 107. The number stamped on the part is 11237503107; BMW's catalog files it under the short number 7503107. You will find it on our Engine shelf, under Other Engine parts.
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 the Belt Drive-Vibration Damper (11_3181) diagram. It weighs about 230 g (0.5 lb).
We have not had one on the shelf yet. Request it and we will tell you when one comes off a car.
