Auto parts stores sell a rear view mounting repair kit thingy.
Rear view mirror fell off windshield chunk glass.
Went to walmart and they had the permatex repair adhesive kit.
It s a basic mirror with no special features.
The rear visibility of your car gets reduced if rear view mirror falls off.
In case you have not secured rear view mirror to the roofs by making use of screws then it will glue to the windshield.
I pulled it down and noticed that there was a chunk of glass glued to the button and a roughly 1 4 asymmetrical crease in the windshield where the mirror used to go see below.
You could try to fit that chunk back in there.
Or just fill the hole in and then re mount right below or next to it.
This is also true if you hit pot hole or bump.
It s been a while since i ve done this.
Basically an alcohol wipe and some super glue.
You can get the glass off the mirror button with a torch or heat gun and a putty knife.
Maybe you can prolong the eventual cracking that way.
I ve seen this happen on numerous occasions twice to myself.
I was just adjusting the mirror on my 2004 wrx when it just fell off.
The mirror on an 08 nissan altima fell off taking a chunk of glass out.
Yesterday i hopped into my 2001 a4 a secondary car for me and i noticed the mirror was dangling from the windshield.
With time your rear view mirror comes out.
You can use glue to put the mirror back on but if you live in an area were the weather changes from hot to cold or visa versa the windshield may crack.
If not you can fill the hole with plate glass resin or pit resin cure scrape and polish to get a smooth surface.
It s a bit odd.
If you are careful you may be able to get the glass off in one piece and glue it back in place with repair resin or rear view mirror adhesive.
There is a hole about the size of a nickel not completely through the windshield and the chunk of glass is still attached to the mirror base.