VEHICLE WAS INVOLVED IN AN ACCIDENT DRIVING ON A HIGHWAY (SPEED APPROX. 45) WHEN ANOTHER VEHICLE FAILED TO YIELD AT A STOP SIGN. FRONT PASSENGER SIDE OF VEHICLE IMPACT WITH FRONT OF OTHER VEHICLE. AIR BAGS DID NOT DEPLOY AND THE SEAT BELT DID NOT LOCK CAUSING THE DRIVER'S FACE TO HIT THE STEERING WHEEL. DUE TO THE SEAT BELT NOT LOCKING FACIAL INJURIES WERE SUSTAINED.