eninty, pls go to this site
http://www.koperformance.com/. For my 2006 325 auto, the radiator adjusting screw is 2 per car with production dates thru 10/05 and ONLY 1 PER CAR with prod dates from 11/05. My prod date is 09/05 which explains why I have 2 radiator drain plugs. I think this confirms your opinion on your previous post that BMW changed the radiator plug on later prod models.