MY 16 YEAR OLD DAUGHTER WAS DRIVING OUR TOYOTA SIENNA WHEN SHE RAN INTO THE BACK OF ANOTHER VEHICLE (THAT HAD JUST BEEN INVOLVED IN AN ACCIDENT) AT ABOUT 35-40 MILES PER HOUR. IN SPITE OF A FRONT IMPACT COLLISION THAT BUCKLED THE HOOD AND TOTALLED OUR VAN, THE AIRBAGS DID NOT DEPLOY AND THE SEAT BELT DID NOT LOCK. THIS CAUSED MY DAUGHTER TO HIT HER HEAD ON THE STEERING WHEEL. MY CONCERN IS OVER THE FACT THAT THE AIR BAGS DID NOT DEPLOY. EVEN THOUGH THE VAN IS 8 YEARS OLD THERE HAS NEVER BEEN ANOTHER ACCIDENT IN IT AND NO TAMPERING HAS BEEN DONE WITH THE AIRBAG SYSTEM. IT SHOULD HAVE DEPLOYED AND I AM CONCERNED ABOUT DEFECT.