After many years of good service, I noticed my Nuvi 3490 will suddenly reboot while in the middle of navigating to a destination. It seems to happen at certain locations but not regularly enough to be a definite pattern. I had something similar happen years ago with my Nuvi 350 NA while in vacation in Hawaii. There was one specific spot on the highway where the unit would reboot almost without fail.Now my 3490 is starting to have the same issue. It only appears to do this when a destination has been input and it is actively navigating.
I've been installing updates as they are released. Even reinstalled the map.