Starter & Alternator 90-01-4058 Remanufactured 21SI Series Alternator 12V 100 Amp

The Starter & Alternator 90-01-4058 is a professionally remanufactured 21SI series alternator designed for automotive, heavy-duty truck, agricultural, industrial, and marine applications. This 12-volt, 100-amp alternator delivers reliable charging performance with OE-equivalent quality at an economical price point.

Key Specifications:

• Series: 21SI (Delco Remy style)
• Voltage: 12 Volt
• Amperage: 100 Amp
• Rotation: Clockwise
• Polarity: Negative ground
• Regulator Type: Internal voltage regulator
• Cooling: External fan, air-cooled
• One-wire capable
• Pulley not included

Remanufacturing Process:

This alternator undergoes a comprehensive remanufacturing process that includes complete teardown, cleaning, inspection, and reassembly with components that are tested, sorted, and renewed to original equipment standards. Each unit is thoroughly tested and performance-validated to ensure reliable operation under demanding conditions including low battery capacity, extreme temperatures, and high electrical loads.

Quality Standards:

Remanufactured to meet or exceed OE specifications for function, form, and fit. Components are manufactured from high-quality materials and assembled using state-of-the-art processes and equipment. This alternator is compatible with Delco and Delphi OE alternators and serves as a direct replacement for factory units.

Note: Core charge may apply. This is a remanufactured unit backed by a limited warranty.