CONSUMER WAS TRAVELING AT APPROXIMATELY 40 MPH WHEN SHE SLAMMED ON BRAKES, AND FRONT OF VEHICLE IMPACTED A TREE. WHEN THIS HAPPENED, FRONTAL, DRIVER'S AND PASSENGER'S AIR BAGS FAILED TO DEPLOY. RATE OF INCLINE AND LOCATION OF SENSORS COULD HAVE RESULTED IN FAILURE OF AIR BAG TO DEPLOY. *AK