Quality-Built 101-20201 Heavy-Duty Alternator 24V 45A 23SI New

The Quality-Built 101-20201 is a new heavy-duty alternator delivering 24 volts and 45 amps of output, built on the proven Delco 23SI platform. Engineered for demanding commercial, fleet, and heavy-equipment applications, this unit carries no core charge and ships ready to install. It serves as a direct replacement for Wilson 90-01-3157 and 90-01-3157N, as well as AC Delco 321-660 and 321-665A.

Key Features:

• 24V / 45A output — purpose-built for heavy-duty electrical system demands
• 23SI alternator platform — industry-standard design for broad compatibility
• New unit — no core charge required, no return of old part needed
• Replaces Wilson 90-01-3157, 90-01-3157N; AC Delco 321-660, 321-665A
• Manufactured to meet or exceed OE fit and performance specifications
• 100% end-of-line tested for reliability and durability before shipment
• Three-phase performance tested to ensure consistent charging output

Quality-Built alternators are produced in ISO/TS 16949 certified manufacturing facilities and undergo rigorous durability testing and root cause analysis to deliver dependable performance. The 101-20201 is an ideal drop-in solution for operators who need a reliable 24-volt charging system without the hassle or delay of a core exchange.