Re: 2015 Toyota Sienna SE Premium - Navi powers down while driving
Update: Toyota dealer reflashed and updated the Navigation/radio for the Sienna SE and everything is faster, esp when inputting the destination via the keyboard. I purchased a 2015 Toyota Sienna SE in January 2015, and it was an early build one. The newer Sienna's should not have the problem per the dealer, just the early 2015 models.
Just wanted to share if your navi powers down or it is super slow and you purchased a 2015 Sienna in early 2015, you may need to have the dealer update the navigation/radio software at your next maintenance. Keep in mind, also my dealership did not want to do this. I had to show them a video of the Navi powering down while driving and filing a complaint with Toyota USA and then the dealer agreed to look into it.