The stock mirror has map lights so there's juice there to tap off of but electric is there all the time.Got to tap an ignition post.
The problem on the Toyota part dimming mirror is that there's a note that the mirror cannot be used if vehicle has side airbags.
We have side airbags.
I talked to a guy from Brands Sport Automotive(where I've bought Toyota parts in the past) and he says the plugs might be different because of the side airbags.
I thought the problem would be running the temperature wire down the side panels would interfere with the airbags going off properly.
Don't need a temp reading on the mirror because it's by the odometer.
The guy says the Toyota mirror is made by Gentex Corp.
The Toyota mirror says Gentex Corp right on it.
I wound up buying a Gentex Corp mirror without temp and compass,just dimming and map lights for $90 with free shipping.
No Toyota plugs just straight wiring.
The Toyota dimming mirror with compass and temp reading is $240.
So $90 is a great price as I don't need the compass or temp reading.
Here's the mirror that's $10 less than I paid!
Then again shipping was free on my order.
I found some directions for the install and it seems the wires still have to be runs down the side pillar.
The "cannot be used if vehicle has side airbags" on a Toyota parts site
has me a bit worried a bit.