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WAI 21687N Alternator
| Brand | WAI 21687N |
|---|---|
| 12 | 12 |
| Fan Type | Internal |
| Rotation Direction | Clockwise (right) |
| Pulley Included | Yes |
| Family | Mitsubishi |
| Pulley Groove Quantity | 6 |
| Pulley Belt Type | Serpentine |
| Regulator Type | Internal |
| Decoupled Or Clutch Pulley | No |
| Amperage Rating | 130 |
| Fits | Subaru · 6 vehicles |
100% new unit. Not remanufactured, with proprietary components and processes.
130-amp output. Built to supply the electrical demand of modern charging systems.
Complete pulley setup. Includes a 6-groove serpentine pulley for service-ready installation.
Cross-references Walker Exhaust 21687, 23700-AA930 and 23700-AA931 for the same application. See all 5.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Overview
This WAI alternator, part number 21687N, is a new replacement charging unit built for vehicles that need stable electrical output. It is engineered to deliver 130 amps and includes an internal regulator, internal fan, and pulley for a complete service-ready design.
Key Features
- 130-amp output for modern electrical loads
- 100% new construction, not remanufactured
- Internal regulator for integrated voltage control
- Internal fan design for compact packaging
- 6-groove pulley with serpentine belt drive
- Clockwise rotation with decoupled pulley not used
Detailed Description
WAI alternator 21687N is built with proprietary components and manufacturing processes to support long service life and consistent performance. The Mitsubishi family design, 12-volt electrical system, and included pulley make it a direct-fit style charging component for select Subaru applications. This part cross-references Walker Exhaust (e.g., 21687) for the same application.
Fits 2015-2017 Subaru Legacy and Fits 2015-2017 Subaru Outback, N/A.
Common Replacement Uses
- Restores charging output when the battery is not staying charged
- Addresses dim lights or unstable electrical performance
- Replaces a worn alternator with a new unit
- Helps correct charging-system warning lights
- Supports vehicles with higher electrical demand
Installation Notes and Tips
Verify pulley groove count, belt type, rotation direction, and electrical connector match before installation. Confirm fitment for the specific Subaru Legacy or Subaru Outback application listed above, and inspect the belt and charging-system wiring during replacement.
Quality Assurance
WAI builds this alternator as a 100% new unit using proprietary components and processes to support maximum life and performance.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2017 | Subaru | Legacy | 3.6L | H6 | — |
| 2017 | Subaru | Outback | 3.6L | H6 | — |
| 2016 | Subaru | Legacy | 3.6L | H6 | — |
| 2016 | Subaru | Outback | 3.6L | H6 | — |
| 2015 | Subaru | Legacy | 3.6L | H6 | — |
| 2015 | Subaru | Outback | 3.6L | H6 | — |
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