How important is the ac compressor for a 2001 mazda mpv
It all depends.
I’m not at the shop to be able to look up your vehicle at the moment for specific details, but if you look at the drive belts and see how they are routed, you should be able to see if the A/C compressor has a dedicated belt. If the belt to the A/C is by itself, you can buy yourself a little time by removing, or cutting off the belt to it.
If it’s making noise, you probably have a bad bearing and you do not want to be driving it unless you can remove the belt.
If you leave it as it is and the bearing goes completely out, it could make a pretty serious costly mess. For example, it could take out several expensive parts with it such as the radiator, cooling fan, fan shroud, alternator, etc... hopefully you get the idea.
Please note, with the belt removed from it you will not have A/C.
hopefully you find this info useful.