My 2015 NX 200t, was side swiped and the drivers side mirror was completely ripped off. Greatfully the only damage was to the inner base part which holds the mirror. Not sure what that part is called. I managed to place the mirror back on, it's a bit wobbly and not secured.

 

https://fabtechsystems.com/images/ca...a9b3218e78.jpg

 

My mom just had this happen a couple hours ago to her NX 200t F Sport. It broke at the interior black plastic piece between the base and the mirror itself. Not sure if this piece can be repair or even replaced without a whole new mirror assembly. Let me know how this works out for you?