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WAI 21603N Alternator
| Brand | WAI 21603N |
|---|---|
| 12 | 12 |
| Fan Type | Internal |
| Rotation Direction | Clockwise (right) |
| Pulley Included | Yes |
| Family | Seg |
| Pulley Groove Quantity | 6 |
| Pulley Belt Type | Serpentine |
| Regulator Type | Internal |
| Decoupled Or Clutch Pulley | Yes |
| Amperage Rating | 120 |
| Fits | Nissan · 3 vehicles |
100% new construction. Not remanufactured, with proprietary components and processes.
120-amp output. Built to supply the electrical demand of modern charging systems.
Internal regulator design. Includes an internal fan and serpentine pulley configuration.
Cross-references Gates 21603, 23100-6LB0A and F 000 BL0 79B for the same application. See all 3.
Overview
This WAI alternator, part number 21603N, is a 120-amp replacement unit built for modern charging demands. It is a 100% new alternator, not remanufactured, and uses proprietary components and processes for consistent performance and service life.
Compatible with Nissan Sentra applications, this alternator is a fitment-based replacement for 2020-2021 and 2022 vehicles with the listed application note. The 21603N is built with an internal regulator, internal fan, serpentine pulley setup, and clockwise rotation.
Key Features
- 120-amp output for vehicles with higher electrical demand
- 100% new construction, not remanufactured
- Internal regulator and internal fan design
- Serpentine belt pulley with 6 grooves
- Decoupled clutch pulley included
Detailed Description
WAI 21603N is an alternator from the SEG family engineered to supply the amperage needed by today’s electrical systems. Its 12-volt design, clockwise rotation, and pulley configuration support direct replacement use where the application matches the listed fitment. For Nissan Sentra owners, this part number 21603N provides a new-build charging solution for the specified model years.
This part cross-references Gates 21603 and OE numbers 23100-6LB0A and F 000 BL0 79B for the same application.
What It Solves
- Low charging output from a worn alternator
- Battery warning light caused by charging system failure
- Electrical instability from insufficient amperage supply
- Noise or pulley-related alternator issues
Installation Notes
Verify pulley type, rotation direction, amperage rating, and connector/application details before installation. Confirm the vehicle matches the listed Nissan Sentra fitment and the 2022 note of use through 09/2021. Use the part number 21603N to match the correct charging system configuration.
Quality Assurance
WAI builds this alternator with proprietary components and processes to support maximum life and performance. The 21603N is supplied as a new unit rather than a remanufactured assembly.
| Year | Make | Model | Notes |
|---|---|---|---|
| 2022 | Nissan | Sentra | To 09/2021 |
| 2021 | Nissan | Sentra | — |
| 2020 | Nissan | Sentra | — |
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