WHILE APPROACHING INTERSECTION, OUR 2007 TOYOTA PRIUS FAILED TO STOP. WHILE BRAKING, THE CAR CONTINUED TO ROLL - INTO THE SIDE OF A TRUCK. THE CAR WAS TOTALED. AT THE TIME, WE EXPLAINED THAT THE BRAKES WERE APPLIED, BUT THE CAR FAILED TO STOP. WE ASKED THE INSURANCE COMPANY AND TOYOTA IF THERE WERE ANY REPORTS OF PROBLEMS WITH THE PRIUS, AND WE WERE TOLD "NO REPORTED PROBLEMS" WITH THE CAR. PRIOR TO THE INCIDENT WE HAD JUST HAD THE 25,000 MILE MAINTENANCE DONE SO WE KNEW IT WAS NOT THE BRAKES. ABOUT A YEAR LATER, WE WERE INFORMED OF THE CAR MAT PROBLEM, AND NOW THERE IS TALK OF POSSIBLE ACCELERATOR/ELECTRONIC PROBLEMS. WE NOW HAVE A 2008 PRIUS, AND EXPERIENCE A MOMENTARY LOSS OF THE ELECTRONIC SYSTEM WHEN THE CAR HITS A BUMP. WE CONTACTED TOYOTA LAST WEEK, AND WERE PROMISED A CALLBACK IN TWO DAYS, BUT SO FAR WE HAVE NOT HEARD ANYTHING. SO UNTIL WE GET ASSURANCE THAT OUR CAR IS SAFE, WE HAVE DECIDED TO STOP DRIVING THE PRIUS. SUBSEQUENT TO THE ACCIDENT, MY BACK PAIN WENT FROM MANAGEABLE TO UNBEARABLE, WHICH LED TO SPINE SURGERY IN 1/09. MY PHYSICIANS BELIEVED THAT THE ACCIDENT MIGHT HAVE AGGRAVATED THE SYMPTOMS TO THE POINT THAT I REQUIRED SURGERY - POSSIBLY FROM THE IMPACT FROM THE AIRBAGS. *TR