TL* THE CONTACT OWNS A 2009 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE ATTEMPTING TO CHECK THE OIL LEVEL, THE HOOD LID WAS OPEN AND INADVERTENTLY CRASHED DOWN ONTO THE CONTACT'S HEAD WITHOUT WARNING. THE CONTACT SUSTAINED INJURIES THAT REQUIRED MEDICAL ATTENTION. THE VEHICLE WAS TAKEN TO A DEALER, WHERE THE TECHNICIAN EXPERIENCED THE SAME FAILURE AND REPLACED THE HINGE. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 47,000.