complaint, and request that such motor vehicle manufacturer answer such complaint in writing within a reasonable time to be specified by the Commission. (3) Further action If such motor vehicle manufacturer within the time specified in paragraph (2) has ceased the conduct that is the subject of the complaint and has otherwise made reparation for any harm or injury alleged to have been caused, the motor vehicle manufacturer shall be relieved of liability to the complainant only for the particular violation of law thus complained of. If such motor vehicle manufacturer does not satisfy the complaint within the time specified or there is any reasonable ground for investigating such complaint, the Commission shall investigate the matters complained of in such manner and by such means as it shall consider proper. No complaint may at any time be dismissed because of the absence of direct damage to the complaint. (4) Deadline for orders by the Commission The Commission shall, with respect to any investigation of complaint of a violation of this Act or a regulation issued under section 5, issue an order concluding such investigation within 5 months after the date on which the complaint was filed. Any order concluding an investigation under this paragraph shall be a final order and may be appealed to the Federal district court for the District of Columbia. 7. Definitions (a) Definitions In this Act, the following definitions apply: (1) Aftermarket part The term aftermarket part means any part offered for sale or for installation in or on a motor vehicle after such vehicle has left the vehicle manufacturer's production line. Such term does not include any original equipment or part manufactured for a motor vehicle manufacturer. (2) Barrier The term barrier means a restriction that prohibits, makes more difficult, or tends to make more difficult, the ability of a person to exercise rights under this Act. (3) Critical repair information and tools The term critical repair information and tools means all necessary technical