Rattling rear view mirror

SOURCE: Reattach rear view mirror

there is a small alan screw in the base of the backup mirror. loose it and slide the mirror back on to teh base on the windshield and tighten down the alan screw.

SOURCE: How do you remove the rear view mirror from mount.

Is the mount made of metal or plastic? In either case, it will be attached to a "base" that is glued to the windshield. A metal mount should have a tiny little screw in it that pins it against the base. Loosen this crew and the mount should slide upwards (towards roof) off the base. A plastic mount should have a tab that you can pull on and slide it off upwards....

Testimonial: "Exactly what we thought was the correct way. But they found that the previous owner had also glued the mirror stem to the mount. "

SOURCE: How to remove metal tab on back of rear view mirror 98 Jimmy

Check with a glass shop.

SOURCE: Honda CRV rear view mirror removal

There are three ways usually...

You'll need to remove a screw securing the base onto the mount (usually on metal bases)

You'll need to lift up a clip on the bottom of the base and then slide the base off the mount (usually on plastic rectangular bases

You'll need to twist the base about 45 - 90 degrees so that it slips off of the mount (usually on bases that are circular)

Testimonial: "Excellent response and timely! I am attempting to find the right "tool" to pry up the internal clip...a flatblade screwdriver doesn't seem to do it."

SOURCE: My rear view mirror fell off....however, the

Nothing to involved with these mirrors. Some mirrors do clip back on the bracket others screw on. If the screw fell out and you cant find it, you would be better off just getting a replacement mirror. If the clip is broken, then you should also replace mirror.
To remove the old mirror bracket, you will see where it is attached to the windshield, there is either a hex screw or phillips screw holding the bracket to the glued mount piece attached to the windshield, loosen screw, slide bracket up and replace with new mirror.
If it is the steel mount thats glued that has fallen off the windshield, then go down to your local auto parts store, ask the staff there for windshield mirror glue, comes in a small tube with directions on how to re-glue the steel mount to your windshield. Hope this helps.