The rear visibility of your car gets reduced if rear view mirror falls off.
How to fix a rear view mirror that fell off bmw.
Most cars have the rear view mirror and the little metal mount that it slides into.
With time your rear view mirror comes out.
In case you have not secured rear view mirror to the roofs by making use of screws then it will glue to the windshield.
At times we see that rear view mirror fell off that creates problem to the driver.
Go to an auto parts place and tell the counter person you need the glue to glue your mirror mount to the windshield.