The contact owns a 2013 Dodge Avenger. The contact stated that while driving approximately 55 mph, the driver seat headrest restraint was erroneously deployed. The contact indicated that during the incident the vehicle had not crashed or abruptly stopped to cause the headrest restraint to deploy. During the incident, the contact sustained an injured neck. No medical treatment was required. The cause of the failure was not determined. The local dealer and manufacturer were not notified of the failure. The failure mileage was 133,000.