I order a new frameless mirror with homelink from Bob's mirrors. He sells mirrors that are plug and play for our sienna using the accessory harness above the center lights. Here is the thread about it.
www.siennachat.com
Another route is to do it yourself. When i was researching homelink mirrors, this was another option i was thinking about doing. Buy a homelink mirror yourself and just splice the wires to use the accessory harness. You can possibly even buy the OEM mirror from higher trims or other toyota vehicles if you want to keep the OEM style. I learned too that one of the Tacoma gen homelink mirrors uses a battery so no wires required but would have to buy a whole new mirror once the battery is dead if you like that idea.
I decided to just order from Bob's mirrors. Just easier plug and play.
2021 Sienna LE Rear View Mirror Upgrade
My wife was missing her Homelink garage door opener that she had on her 2012 Sienna LE, so with some help from Bob Prim at 100066-NEW Advent/Gentex Frameless Auto Dim Rear View Mirror I was able to drag the 2021 LE back to 2012 with an auto-dimming rear view mirror with Homelink and it's plug...
Another route is to do it yourself. When i was researching homelink mirrors, this was another option i was thinking about doing. Buy a homelink mirror yourself and just splice the wires to use the accessory harness. You can possibly even buy the OEM mirror from higher trims or other toyota vehicles if you want to keep the OEM style. I learned too that one of the Tacoma gen homelink mirrors uses a battery so no wires required but would have to buy a whole new mirror once the battery is dead if you like that idea.
I decided to just order from Bob's mirrors. Just easier plug and play.