Aftermarket suppliers and Distributers are the part of the automotive industry concerned with the manufacturing, remanufacturing, distribution, retailing, and installation of all automotive parts and accessories for vehicles, after the sale of the automobile by the original vehicle manufacturer or OEM.

Estimated as a $257 billion market in the United States alone, aftermarket suppliers and distributers help keep vehicles properly maintained by providing consumers the choice of where they want their vehicles serviced, maintained or customized. Many times individuals choose to maintain their vehicle on their own (DIY) and heavily rely on "bigbox discount" chains for their vehicle parts and accessories.