Motorcar Parts of America, Inc. operates as a supplier of automotive aftermarket non-discretionary replacement parts and test solutions and diagnostic equipment in the United States. It operates through three segments: Hard Parts, Test Solutions and Diagnostic Equipment, and Heavy Duty. The company offers light duty rotating electrical products, including alternators and starters; wheel hub assemblies and bearings; and brake-related products comprising brake calipers, brake boosters, brake rotors, brake pads, and brake master cylinders. It also provides test solutions and diagnostic equipment that include applications for combustion engine vehicles, such as bench-top testers for alternators and starters; equipment for the pre- and post-production of electric vehicles; and software emulation of power systems applications for the electrification of various forms of transportation. In addition, the company offers heavy duty parts, including non-discretionary automotive aftermarket replacement hard parts for heavy-duty truck, industrial, marine, and agricultural applications. It sells its products to automotive retail chain stores and warehouse distributors in North America, as well as various automobile manufacturers for their aftermarket programs and warranty replacement programs. The company provides its products under the Private Label, Quality-Built, Pure Energy, D&V Electronics, Dixie Electric, and DelStar brands. Motorcar Parts of America, Inc. was incorporated in 1968 and is headquartered in Torrance, California.