Wilson 90-01-4072 Remanufactured 21SI Alternator 12V 145 Amp

The Wilson 90-01-4072 is a professional-grade remanufactured 21SI series alternator designed for heavy-duty trucks and commercial vehicles. This 12-volt, 145-amp alternator delivers reliable performance for demanding applications across multiple vehicle types including Chevrolet/GMC, Ford, Freightliner, International, Kenworth, Mack, Peterbilt, Volvo, and Western Star trucks from 1986-2004.

Remanufactured to Exceed OE Standards:

• Complete tear down and cleaning process with rigorous quality control
• All wear components replaced with parts meeting strict Wilson quality standards
• Heavy-duty bearings to prevent damage from vibration and heat
• Upgraded rectifiers for proper load handling and effective battery charging
• New brushes, slip rings, and springs for optimal electrical conduction
• Performance tested prior to shipping with unique test report included

Wilson remanufactured alternators provide professional-grade reliability for commercial fleets, agricultural equipment, and industrial applications. Built using processes similar to original equipment manufacturing, these alternators install easily and deliver trouble-free operation designed to minimize downtime and maximize uptime for revenue-generating vehicles.