How To Section: http://mazda3revolution.com/forums/...4-2017-mazda-3-skyactiv-how-guides/94714-how-install-power-folding-mirrors.html

Follows the same logic with your 2018. You'll need to find the wiring diagram and ensure you purchase an autofold kit with BSM. If that thread isn't enough, I recommend you search the forum for "auto mirror" You'll see multiple threads related to this.

Good luck! Let us know how it goes.

 

yes please let us know how it goes. Losing BSM is the only thing hold me back from buying the folding mirrors.
I manually fold my drivers side every day and its annoying.

 

Why would you lose it? can't you transplant everything inside the folding housing?