High Output Alternator for Nissan Xterra (2000-2004) 2.4L
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Heavy-Duty High-Output Alternator for 2000-2004 Nissan Xterra (WD22)
What it Does: The high-output alternator replaces the low-amperage factory charging unit on the 2000-2004 Nissan Xterra to stabilize system voltage and provide dependable electrical current for heavy auxiliary demands.
The Stock Nissan Xterra Electrical Deficiencies
The first-generation WD22 chassis equipped with the 2.4L KA24DE inline-four relies on an OEM 70-amp alternator that falls short under modern electrical loads. Operating recovery winches, off-road lighting, communication gear, or auxiliary audio setups quickly overtaxes the stock charging circuit. Under sustained current draw, factory rectifier diodes suffer from severe heat soak, causing idle voltage to collapse below 12.6V, starving ignition systems, degrading AGM batteries, and eventually burning out the stock stator windings.
The Engineering Solution
This Made in USA 140-amp direct-replacement alternator doubles factory output to supply steady current across the entire RPM band. Built in a precision-cast direct-fit casing, it features high-temperature copper windings, low-resistance avalanche diodes, and an upgraded heavy-duty internal voltage regulator. The unit maintains clean 14.4V charging profiles under load, preventing voltage drop at curb idle without requiring custom bracketry or belt drive alterations.
What's Included
- 1x 140-Amp High-Output Alternator
Technical Specifications
| Fitment | 2000-2004 Nissan Xterra |
|---|---|
| Engine / Chassis | KA24DE / WD22 |
| Stock Output | 143 hp / 154 lb-ft |
| Replaces OEM Part # | AL2377X, 210-31556, LR170-766, LR170-766B, 23100-9Z000, 13778N, 13778R, 13778 |
Compatibility
- 2000-2004 Nissan Xterra XE 2.4L L4 (Gasoline)
Frequently Asked Questions & Fitment Warnings
Does this fit the WD22 Xterra?
Yes, this is a direct fit for the 2000-2004 Nissan Xterra equipped with the KA24DE 2.4L engine. This alternator will not fit 3.3L V6 models (VG33E or supercharged VG33ER).
Do I need to upgrade my charging lead wiring?
Upgrading the primary alternator-to-battery B+ cable to a 4-gauge lead with an inline fuse (Big 3 upgrade) is strongly advised to safely transfer the full 140-amp current without thermal resistance.
The Nissan Off-Road Standard
Built for rigorous backcountry exploration, this unit delivers the robust charging overhead required to sustain severe winch pulls and prolonged trail run demands without risk of battery strandings.
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