Ok so I have a 2010 Prius five and I blew the warranty in the first year and a half. At 134k miles the navigation is getting a bit crazy. So while I'm driving (not using the nav) a side bar screen will pop up with a few boxes that say calculating and it will freeze my whole system for about 2 or 3 minutes even though I can still see my location tracking behind the pop up screen. If I'm streaming music that will continue but I can't change songs or volume or anything. It also lags when I get an incoming call so I can hit the transfer button but it will take about 30 seconds. I tried to see if my car needed an update from the 08.1 version but can't seem to find any info on it. I asked the service guy at the dealership if I could do an update and he dodged the question by asking if I'd like to replace it with a new one for like $1500 (not exact amount I don't think but it was enough to make me laugh). I asked if an update was available and he said he was too busy today and walked away. No actual answer. So has anyone else had this problem?
I have not heard of your problem. I have upgraded from 8.1 to 11.1 and there are no "system" fixes included that I could tell. There was supposed to be an improvement in lag time on incoming phone calls but I could not tell any difference. All of the improvements that I could see were all map upgrades, which were quite substantial and included all of the information that I was looking for in NC at the time. My guess is that the service guy is probably correct in that you are experiencing a unit failure. The replacement unit is expensive. You could look at a salvage yard or possibly find a unit on eBay.
