Engine Shut Off Without Warning problems of the 2004 Toyota Scion Xa

Our 2004 prius on four separate occasions had a complete engine shutdown with lots of indicator lights lit on the dashboard. This happened twice while we were traveling on interstate highways in traffic at highway speeds, once in a Toyota dealership while the vehicle was being serviced, and once as we pulled into a toyoto dealership for service. We were not aware we could send a complaint to NHTSA until we say today's msnbc article. The first engine shutdown occurred in the hyannis Toyota dealership in massachusetts. They took quite a while to fix the vehicle and made several phone calls to Toyota engineers for help. They wrote on our receipt: "needs trans replacement for permanent repair. " after we left massachusetts we drove across country toward our home in California. The other three engine shutdowns happened during this trip. We had to be towed (at Toyota's expense) twice as a result of the interstate engine shutdowns and ended up at a Toyota dealership in jackson, mississippi. We had to stay several days at our own expense while they repaired the vehicle, again consulting several times with Toyota engineers during the repair. After we reached California we took the vehicle to south bay Toyota and requested the "permanent" repair described on the hyannis Toyota receipt. We were told they would do nothing because there was no indicator showing any problems at that time. We made several phone calls to Toyota but were unable to get them to do anything further to our car.