As used in this subchapter:
(1) “Aftermarket crash part” means a replacement for any of the nonmechanical sheet metal or plastic parts which generally constitute the exterior of a motor vehicle, including inner and outer panels;
(2) “Installer” means an individual who performs the work of replacing or repairing parts of a motor vehicle;
(3) “Insurer” means an insurance company and any person authorized to represent the insurer with respect to a claim and who is acting within the scope of the person's authority;
(4) “Nonoriginal equipment manufacturer aftermarket crash part” means an aftermarket crash part made by any manufacturer other than the original vehicle manufacturer or his or her suppliers; and
(5) “Repair facility” means a motor vehicle dealer, garage, body shop, or other commercial entity which undertakes the repair or replacement of those parts that generally constitute the exterior of a motor vehicle.