Passengers side.
Step 1...Don't panic,its not that difficult.
Step 2...Working on the inside of the door,remove the plastic door mirror cover using a flat screwdriver or something similar.Its held on in 3 places but not difficult to remove.Unscrew the 2 crosshead screws from the front of the door card to allow access to wiring later.
Step 3...With the cover removed you should now see an electrical connector mounted to the door on a sponge section.Gently lever the whole connector off the door with the flat s/driver keeping the 2 locating lugs intact.
Step 4....Follow the wiring down the right hand side to the door itself and remove the split rubber grommet.You may have to move the door card a little to free things up a little.
Step 5...,Feel around the foam/sponge section where the connector was to find the hidden round hole which conceals the mirror fixing bolt.Remove sponge from the hole to gain access to the single 10mm bolt securing the mirror and remove it.WARNING!! the mirror will fall on the floor once the bolt is removed.Have someone assist for this part but you can manage on your own.
JOB DONE
Fitting the new one is a straight reversal of the removal.
Hope this helps.