1. Locate the two screws at the base of the rearview mirror. They are usually covered by small plastic caps.
2. Remove the plastic caps using a pry tool or your fingernails.
3. Tighten the two screws using a Phillips head screwdriver.
4. Replace the plastic caps.
If the screws are already tight, there may be another issue causing the mirror to be loose. In this case, you should take the car to a qualified mechanic for diagnosis and repair.
