the wheel for the belts is making a sqeeking noise, on 2007 Ford Mustang

I was told the bearings in side the wheel is damage. It occured 4 days ago. Its the wheel that holds the belts. It looks loose.

Asked by for the 2007 Ford Mustang
This is a tensioner or idler pulley I'm guessing. The only way to tell if they are going bad is to remove the belt and spin the by hind. Restrictions or noise and so forth would indicate a bad pulley.