I HAVE TRYED CARFAX BEFORE AND THE TIME I DID WAS ON A 2008 VOLVO XC90 THE DEALER PULLED MY REPORT AND SHOWED THAT IT WAS CLEAN, BUT A YEAR LATER ANOTHER DEALER PULLE THE REPORT SO I CAN TRADE IT IN, AND KABOOOOM IT SHOWED 1 REPORT RIGHT AROUND THE TIME I PURCHASED THE VOLVO SO IT WASNT IN THE SYSTEM RIGHT YET BUT I STILL DIDNT KNOW ABOUT THE ACCIDENT UNTIL I WANTED TO TRADE IN MY VEHICLE. SO IT PROBABLY A GOOD IDEA PEOPLE SHOULD PULL THERE CARFAX A FEW TIMES A YEAR AFTER PURCHASING A USED VEHICLE, ALSO THE VOLVO I PURCHASED WAS SUPPOSE TO BE CERTIFIED??? SO BUYERS PLEASE BEWARE OF WELL KNOWN AUTO DEALERS ON YOUR PURCHASE.