MY STEPSON WAS INVOLVED IN A REAR-END COLLISION WITH A 2008 MAZDA 6. THE DAMAGE IS SEVERE ENOUGH TO THE LEFT REAR AREA OF THE CAR I BELIEVE THE CAR IS TOTALED. IT WAS A 40-50 MPH IMPACT. THE FUEL TANK WAS EXPOSED AFTER THE ACCIDENT AND CRUSHED. MY CONCERN AND COMPLAINT IS WHY DIDN'T THE FUEL SAFETY CUTOFF ACTIVATE AFTER A HARD IMPACT IN THE REAR? I BELIEVE THERE IS A DEVICE MANDATED BY FEDERAL LAWS THAT AFTER A REAR END COLLISION OF THIS MAGNITUDE THAT THE CAR WOULD NOT START AFTER THE IMPACT. IN THIS CASE IT DID START AND RUN SMOOTH. I WOULD LIKE TO HAVE SOMEONE INVESTIGATE AS TO WHY THIS DEVICE WASN'T NOT PROPERLY FUNCTIONING AT THE TIME OF THE ACCIDENT. I WILL ALSO NOTIFY MAZDA AND MY INSURANCE COMPANY OF THIS DEFECT AS WELL. *TR