I removed my door panels to check the 3 bolts that hold my powered mirrors and the bolts are plenty tight. It appears that however the mirror hinges on it's base is where it's loose at. Can anything be done without having to replace them? I'm thinking of just sticking some epoxy in between to reinforce them.

 

You could definitely epoxy it on the base hinges however you wouldn't be able to rotate it back if needed. The mirrors for these vehicles are super cheap to replace, generally if anything happens to one of mine I just buy a whole new unit as they're only like $30 CAD on amazon.

 

The mirrors are absolutely dirt cheap. Check amazon and/or rockauto.com