You need to look and see as I don't believe there was a clean cutoff when the factory started installing them, plus a prior owner could have installed the hydraulic tensioner. In all cases the a/c tensioner is mechanical.
Old thread, I know. So the A/C is ALWAYS mechanical, and can use the (delete"DELCO") Dayco that E46Mango recommends??? The main drive belt is probably hydraulic on a 2005 (09/2004 build date) 330XI? Just replace both pulley's and the idler pulley - which is always mechanical too?
A forum community dedicated to BMW E46, E90, and F30 owners and enthusiasts. Come join the discussion about M performance, turbo kits, engine swaps, builds, modifications, classifieds, troubleshooting, maintenance, and more!