TL*THE CONTACT OWNS A 2008 TOYOTA 4RUNNER (NA). THE CONTACT STATED THAT THE ACTIVE HEAD REST SAFETY SYSTEM DID NOT ACTIVATE WHEN THE VEHICLE WAS REAR ENDED. THE DEALER STATED THAT THERE WAS NEVER A HEAD REST SAFETY SYSTEM INSTALLED IN THE VEHICLE. THE CONTACT STATED THAT ACCORDING TO THE MANUFACTURER'S DOCUMENTATION, ALL 2008 TOYOTAS SHOULD HAVE THE FEATURE INSTALLED. THE DRIVER SUSTAINED NECK AND BACK INJURIES AND THE FRONT SEAT PASSENGER SUSTAINED INJURIES TO THE ARM, NECK, AND BACK. AS OF NOVEMBER 19, 2007, THE MANUFACTURER HAD NOT RETURNED ANY PHONE CALLS. A POLICE REPORT WAS FILED. THE SPEED WAS UNKNOWN. THE FAILURE MILEAGE WAS 2,100 AND CURRENT MILEAGE WAS 2,750.