Motorcar Parts of America, Inc. is a remanufacturer, manufacturer, and distributor of automotive aftermarket parts. The Hard Parts segment includes light-duty rotating electric products such as alternators and starters; wheel hub products; brake-related products, including brake calipers, brake boosters, brake rotors, brake pads and brake master cylinders, and turbochargers. The Test Solutions and Diagnostic Equipment segment offers applications for combustion engine vehicles, including bench-top testers for alternators and starters; equipment for the pre- and post-production of electric vehicles, and software emulation of power system applications for the electrification of all forms of transportation. The Heavy Duty segment includes non-discretionary automotive aftermarket replacement hard parts for heavy-duty truck, industrial, marine, and others. Its products are sold to automotive retail outlets and the professional repair market throughout the United States, Canada, and Mexico.