A/C stopped cooling all of a sudden. Checked under the hood, and oddly enough, the front face of the compressor (clutch?) was falling off - literally. I push it back on, and the A?C cools again. Looks like there is supposed to be a bolt in the middle of the clutch that holds the whole assembly together, that must've fallen off?

Anyone know what size screw this is? I could replace the whole compressor or the clutch, but this seems so much cheaper and more effective.

 

I have that same problem!! I lost this bolt a year ago and no one can tell me the bolt size. Mazda told me it only comes with the compressor. I have called pick and pull parts places for a full years just to try to find a protege with a compressor that I could snag the bolt from, with no luck.