DaveGee

My 911_50 doesn't have a self-dimming rearview mirror. My other cars do so of course I miss it. It is such a hassle to flip that little day/night tab on the bottom of the mirror...

Anyone know how hard it is to replace mine with an OEM auto-dim mirror? And, is the dimming technology embedded in the glass, or is there an electrical charge that activates it - meaning I would then need to confirm that I have wiring in place to support the auto-dim mirror.

TIA,

DaveGee

hoppah

The name of the technology is "electrochromic" - it's definitely powered. There is a photocell on the mirror that "looks" for headlights and controls the dim function.

H.

plenum

For those that like to get technical, the auto-dimming feature is made possible by taking advantage of modern electrochromic technology. Maybe the technology has changed in recent years, but this was how I understand they worked at some point.

Electrochromic materials are those that change color when an electrical charge is provided. Each mirror has electrochromic gel between two pieces of glass and equipped with sensors that detect the intensity of glare from trailing cars' headlights, or other bright lights -- even sun. Based on the level of glare, an electrical charge is released causing the gel to darken and the glass to be effectively tinted. The darkening of the gel is commensurate with the intensity of glare detected.

I posted a video a long time back in another thread showing the color changing on my own mirror during daylight.... In this particular case the mirror was reacting to daylight when I would turn the ignition on, effectively powering the mirror.

NoGaBiker

I bet you could flip it for 400 years with less hassle than changing it out!

(I know you were being ironic...)

DaveGee

Cynical actually...