I have a 2004 Acura TL and my drivers side mirror vibrates when I am driving down the road. It isn't that bad when I am driving down the road but then when I speed up and turn the volume up for my music, the mirror is pretty much unusable. This is a big concern for me because its a safety hazard and I want to get that fixed right away.

 

turn the music down

 

Well most of the time, it's not turned up too loud. But just driving around causes it to vibrate a lot.

 

Mirror actuator most likely

 

Your mirror is not snapped all the way into the actuator. Try pressing gently on each corner and see if it will snap. There are 4 snaps. If you look up the DIY for the mirror actuator, it will show you. Might try just completely removing the mirror and reinstalling it.