Remanufactured Mechanical Parts remanufactured generally means parts removed from an existing vehicle that are repaired and/or refinished. Generally speaking, parts remanufactured by the OE manufacturers (vehicle maker) begin with a used part that is completely disassembled, inspected, diagnosed and cleaned, while any worn or inoperative parts are replaced. The part is reassembled and tested to ensure the part meets the same specifications as the original part. Remanufactured mechanical parts are produced by OEs and non-OE remanufacturers.