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SKP SK13778 AlternatorOE Quality 60-Day Returns
Part #: SK13778

SKP SK13778 Alternator

12 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Nissan, Frontier and Xterra
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Alternator for Nissan Frontier and Xterra

Restore charging performance with the SKP SK13778 alternator, built for 12V electrical systems and rated at 70 amps. This replacement alternator uses an internal fan and clockwise rotation, making it a direct-fit option for select Nissan Frontier and Nissan Xterra applications.

  • 12V alternator with 70 amp output
  • Internal fan design
  • Clockwise (right) rotation direction
  • HITACHI family configuration
  • Negative polarity with M8-1.25 output stud

Fitment Details

  • Fits 1998-2004 Nissan Frontier, N/A; 12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
  • Fits 2000-2004 Nissan Xterra, N/A; 12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud

The SKP SK13778 is a replacement alternator for Nissan Frontier and Xterra models that use the specified 12-volt, 70-amp Hitachi-style configuration. It cross-references BBB Industries 13778 for the same application. Use SK13778 when you need a charging-system replacement that matches the original electrical layout, output rating, and mounting configuration for these Nissan vehicles.

Common Problems This Part Can Address

  • Battery warning light caused by weak charging output
  • Low system voltage at idle or under electrical load
  • Dim headlights or inconsistent accessory performance
  • Charging failure from a worn internal alternator component
  • Starting issues related to insufficient battery recharge

Installation Notes and Tips

Verify the vehicle’s original alternator specifications before installation, including 12V operation, 70A output, clockwise rotation, negative polarity, and the M8-1.25 output stud. Confirm the 1:00 position and Hitachi family layout match the removed unit on your Nissan Frontier or Nissan Xterra. Inspect the charging circuit, battery condition, and belt drive components during replacement to help ensure proper system operation.

Quality Assurance

SKP electrical components are built to meet replacement-part requirements for the listed applications. This part also cross-references Quality-Built 13778N and OEM-style reference 23100-3S500 for the same fitment.

BrandSKP
Part NumberSK13778
Voltage12v
Fan TypeInternal
Rotation DirectionClockwise (right)
FamilyHitachi
Amperage Rating70

This part fits 12 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2004NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2004NissanXterra2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2003NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2003NissanXterra2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2002NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2002NissanXterra2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2001NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2001NissanXterra2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2000NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
2000NissanXterra2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
1999NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud
1998NissanFrontier2.4LL4N/A12 Volts; 70A; 1:00 Position; Negative Polarity; M8-1.25 Output Stud

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1377813778N21377823100-3S500

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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