I replaced the physical mirror itself (the whole thing) by doing the following:
1) Remove the door card (this can be done with the door on or off the car).
2) Locate the 3 circular holes show below and remove the plastic grommets from them.
3) Inside the 3 holes, you will find that three 12 mm nuts hold the mirror to the door. Before you remove them, you will need to unplug the mirror harness from its connector. This should be easy to do.
4) After the harness is removed, remove the 3 nuts. Here's what it looks like on both sides when removed.
Mike