So my 02 Wrx's rearview mirror decided it couldn't stand the heat in the sun anymore and developed a bubble in between the mirror and glass. A day later and the auto dim was no longer working at all. Great, so it's no longer half tint and half clear. But it left a foggy residue on the mirror. I could always find one in the classifieds or send it in with 75 bucks for another one.
In theory, it's a great feature to have but I thought it was harder to see behind me at night. So instead of replacing it, I decided to take it apart and clean it up a bit. I am not responsible for any damage done to you or anything. Do so at your own risk because once you've tampered with the mirror, you won't be able to send it in for a replacement. Here's the process. Maybe it'll help someone.
Tools needed : 1 thin flat head screwdriver and 1 clean razor blade.
1. Start with unplugging the power and then removing the mirror sliding it down with the glass. It is held on by a spring clip. After it is off, you'll need to insert the flat head screwdriver into the slot as shown and gently pry it until the cover pops off.
2. Insert screwdriver into the crevice and pry the housing apart. There are no clips as it looks to be glued together.
3. To remove the rear part of the housing, you'll have to maneuver the connected circuit board through the hole as shown.
4. Separate the metal strip from the glass to make life a bit easier. It's clamped on and lifts right up. You can clip these and discard of them.
5. Face the mirror down, pull out on the tabs in the red triangle, and squeeze on the tabs in the red circle. This is to remove the circuit board from the glass.
6. Insert the blade in between the glass and mirror where the arrow is shown. It can be anywhere along that line. Be careful as it can crack and you might have the edge of the glass chip a bit. Once the blade has made it's way through, follow along until the two pieces are separated. Discard the glass as it is of no use.
Here you can see the fogginess on the glass.
7. Clean the mirror thoroughly using Windex. I preferred to use newspaper instead of paper towels as it leaves the surfaces with no lint or streaks.
8. After everything is clean, you can put everything back together in reverse order. I've use a bit of plastic adhesive to secure it back together and rubber bands are on temporarily until the glue dries. That sums it up. Hope it gives you a better idea if you want a poor mans fix. Not too time consuming. You can tint the glass if you'd like, but I decided to have my windows and rear windshield tinted instead. The compass should need to be recalibrated.