IN general, some mirrors will have screws at their base outside of the car. Others are accessible through the inner door and will require removing part of or maybe the entire door panel first. A good reference is the Haynes manual you can get at Pep Boys or AUtoZone for about $12 to $14 . Removing door panels requires a little patience because they often have plastic "plugs" or "clips" that help hold them in place as well as some carefully, cleverly hidden screws . Get the manual ... it is a good reference . If you are short on change after buying the car, I have also seen the books in the public library .