Altima 2.5 SL L4-2.5L (QR25DE) (2002)
4. Then, using your hands, pull the shell away from the mirror to completely remove it.
^ Be careful, don't use excess force.
5. Inspect the mirror in the areas where the shell fits. If there is damage, replace as necessary.
Install Outside Mirror Shell
6. If you are reinstalling the same shell, inspect the fit areas and the snap points. If there is damage, replace as necessary.
7. First hook the inside end of the shell on the mirror as shown in Figure 4.