WAI 21580N Alternator

Overview

This WAI alternator, part number 21580N, is a new electrical charging component built for vehicles that need stable output and consistent system support. It is engineered for Subaru Legacy and Subaru Outback applications with the specified fitment, and it uses an internal regulator with a decoupled clutch pulley for modern serpentine-drive systems.

Key Features

• 130-amp output for charging-system demand
• 100% new construction, not remanufactured
• Internal fan and internal regulator design
• Clockwise rotation with a 6-groove serpentine pulley
• Pulley included for direct replacement service
• Mitsubishi family alternator design

Detailed Description

WAI part number 21580N is engineered to deliver the amperage needed by today’s vehicle electrical systems while maintaining dependable charging performance. The unit is built as a 100% new alternator using proprietary components and manufacturing processes, and its internal regulator, internal fan, and decoupled clutch pulley support efficient operation in serpentine-belt applications. For buyers searching for a Subaru Legacy alternator or Subaru Outback alternator, this unit matches the listed fitment and configuration requirements.

This alternator cross-references Gates 21580 for the same application.

What It Is Used For

• Restoring proper battery charging output
• Replacing a worn or failing alternator
• Addressing low-voltage or charging warning conditions
• Supporting electrical loads from vehicle accessories and systems

Installation Notes and Tips

Verify pulley style, belt type, rotation direction, and amperage rating before installation. Confirm the vehicle uses the listed serpentine-drive configuration and compare the original unit to part number 21580N to ensure the correct electrical and mechanical match.

Quality Assurance

WAI states that this alternator is 100% new and manufactured with proprietary components and processes to support long service life and consistent performance.