1. Preparation:
* Gather Tools: You'll need a small flat-head screwdriver (preferably plastic or nylon to avoid scratching), possibly some small pry tools (guitar picks or plastic trim removal tools are ideal), and a strong adhesive suitable for mirrors (check auto parts stores for specific mirror adhesive). Clean rags or paper towels are also essential.
* Protect the Mirror: Cover the mirror glass with masking tape to protect it from scratches.
2. Accessing the Backing Plate:
* Look for Clips or Screws: Carefully examine the edges of the mirror housing. There might be small clips holding the metal plate in place. These are often concealed under plastic trim pieces. If you see screws, carefully remove them.
* Gentle Pry: If you don't see any visible fasteners, gently insert your flathead screwdriver or pry tool into the gap between the metal backing plate and the plastic housing. Work your way around the perimeter, carefully prying the plate loose. Apply even pressure to avoid cracking the plastic. Go slowly and use minimal force. The clips might be quite stubborn.
* Explore the Housing: Some mirrors have a small access panel or removable piece on the back, which might offer a better way to access and remove the plate. Check the back of the mirror assembly after removing it from the car.
3. Removing the Backing Plate:
* Once the clips are released, the backing plate should come away from the housing. If it's stuck with old glue, you might need to gently rock it back and forth to loosen it.
* Inspect the Housing: Once the plate is off, inspect the plastic housing for any damage. The original glue might need to be completely removed from both the plate and the housing. Use a plastic scraper or a suitable solvent (check the adhesive manufacturer's instructions) to remove the old adhesive. Be very gentle to avoid damaging the plastic.
4. Reassembly:
* Clean Both Surfaces: Thoroughly clean the mating surfaces of both the metal plate and the plastic housing with a suitable solvent (acetone or isopropyl alcohol) and lint-free cloths to ensure proper adhesion.
* Apply Adhesive: Follow the instructions on your chosen mirror adhesive precisely. Apply a thin, even bead of adhesive to the cleaned surfaces. Too much adhesive can squeeze out and cause a mess.
* Reattach the Backing Plate: Carefully align the metal backing plate with the housing and press firmly in place for the time recommended by the adhesive manufacturer. You might want to use clamps or weights to keep it in place while the adhesive cures.
* Wait for the adhesive to cure Completely: Let the adhesive set for the specified time before reinstalling the mirror in the car. This is crucial for a lasting repair.
Important Considerations:
* If you're not comfortable with this repair, take it to a professional auto glass shop. They have the tools and expertise to handle this delicate task without causing damage.
* Take pictures as you disassemble the mirror. This will help you remember how everything goes back together.
This process involves some risk of damaging the mirror. If you are unsure about any step, it's best to seek professional help. Good luck!
