A refurbished auto part is a used auto part that has been professionally Re-manufactured back to new working condition according to industry standards. Re-manufactured auto parts generally come with warranties.

An aftermarket part is any part for a vehicle that is not sourced from the car's maker. If the parts are direct replacement parts, they will not void your car's warranty. A number of companies make parts designed to function the same, or in some cases even better than the original.

The acronym OEM stands for Original Equipment Manufacturer, which means that the auto part is manufactured by the auto maker of your vehicle. In contrast to after market parts, OEM auto parts are made specifically for your make and model vehicle.