I found a damaged heated mirror off a 99 that I cut up and took apart. To open up your mirror you just center it left to right, and then aim it all the way up. Then, insert a flat head screwdriver in the slot show by the green arrow. I'm not sure if it's possible, but could somebody check to see if you can buy just the mirror, not the whole housing and such from the dealer? Cause if you can, all it will take is running a power and ground into the mirror and adding a switch and shazaam you have heated mirrors on 98 and older runner.