general problems of the 2012 Mazda CX9

While traveling on the turnpike at 70 mph at night my entire dash board, including speedometer, warning lights and temperature controls and head lights and back lights went blank and dark. Pulled off road and shut engine off. Was going to call road service, but turned engine on and everything came on. Drove another 15 minutes and the entire dashboard and head lights went out. Pulled off road and shut off engine and turned it on again and all was working again. Got home safely without more problems. Same problems with dashboard during daylight thereafter. Took car to dealer ASAP where all my service has been done since car bought new. Dealer had car 4 days and could not duplicate problem until the third day when one of the master technicians drove the car 30 miles to his home. This time I was told the entire dashboard went black at night. Was told by dealer that they think they fixed the problem by some computer adjustment to a sensor. Really got no details of what was wrong and will it happen again. All of these problems started a few days after dealer had car for the front lower control arms safety recall 851g and other routine service such as oil change, wheel alignment, multi point inspection and battery replacement to new battery. Also tire rotation. Overall a very dangerous situation that could have caused an accident with serious injuries or death.