ProStart Remanufactured Alternator (14158) All units are completely disassembled and reclaimed parts are cleaned, inspected and thoroughly tested All wear parts are replaced in every unit, regardless of condition Each ProStart remanufactured alternator goes through three stages of testing; before, during, and at the end of the remanufacturing process Each alternator receives all new brushes and bearings, pressure-fit high capacity diodes and precision polished slip-rings in addition to a thorough qualifying of the housing, stator and all reclaimed components Every ProStart alternator is performance tested and required to pass OE specifications before leaving the factory