That's the AC tensioner pulley. that came off on my car too doing 80 on the highway...luckily it didn't break any other belts. If the other belts are messed up, I wouldn't recommend driving it. Buy new parts from acuraautomotiveparts.org, or this guy on h-t sells oem parts discounted. PM if you have any more questions
yup.i just took it up to the local engine shop right by me...the guy said it was hooked up to the AC...(i looked around, im in MI, with snow on the ground) and i was just like well sonuvabitch, ill deal with it when it gets warmer out.
and the noise was the pully was rubbing on the PS belt...and i took the brokent pully out so of course there's no more noise...and ill cut the loose belt so it doesnt get in the way of anything else.
this is what happen
the bolt most likely snapped inside the a/c mounting bracket. thats the bracket that holds the a/c to the block. how do i know of this happening? because it happen to me a few months ago and yes i fixed and replaced it. this is what i found i can help you out if you want