About 3 months ago I lost the GPS on my Prius V 4 and it went down hill from there. The radio would turn on and then go into this reboot cycle of playing for various lengths of time and then reboot. I found a solution on Ebay Roberts Auto Electronics of Louisville, KY. They sold me a refurbished radio that fit perfectly and YouTube provided the video as to how to install. It went swimmingly and took all of 20 minutes to swap out the new for the old. Roberts Auto Electronics was great they answered all my questions prior to purchase and now I have a working audio and gps system once again the is warranted for a year. Plus all the functionality of a 2016 audio system.
thanks for the info, could be very helpful to people with bad radios, and there seem to be quite a few. all the best!