Bosch Professional Preferred Remanufactured Alternators are built especially for the extremes of heat, cold and high demand. They are built to last, using high-quality materials and technologically advanced processes.? All alternator parts are? 100% factory tested prior to and during remanufacturing to assure that? they meet or exceed original equipment specifications, and every Bosch remanufactured alternator is full-load tested to guarantee compliance with Bosch''s strict performance specifications.Product Features:100% new, high-quality bearings provide longer life and quiet, vibration-free operationRotor slip ring is machined to tough concentricity specifications to increase brush life and reduce electrical interference on computer-controlled vehiclesVoltage regulators and rectifiers are 100% tested and replaced where required to ensure a stable voltage output, eliminate shorts and open circuits and provide unsurpassed reliability under extreme conditions. Most Alternators products are available for in-store pickup from Advance Auto Parts.