Bosch Professional Preferred Remanufactured Alternators are built to withstand the extremes of heat, cold and high demand. Manufactured with technologically advanced processes and constructed from high-quality materials, these alternators are built to last.? 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 ensure compliance with Bosch's strict performance specifications.Product Features:100% new, high-quality bearings provide a long working life and promote quiet, vibration-free operationRotor slip ring is machined to tough concentricity specifications to offer increased brush life and reduced 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 excellent reliability under extreme conditions. Most Alternators products are available for in-store pickup from Advance Auto Parts.