Part #: 13874N

WAI 13874N Alternator

4 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Dodge, Ram 2500 and Ram 3500
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Reliable Alternator for Dodge Ram 2500 and Ram 3500

The WAI 13874N alternator is designed to provide consistent electrical charging and starting performance for Dodge Ram 2500 and Ram 3500 trucks. Engineered with an internal fan and a serpentine pulley system, this alternator supports your vehicle's demanding electrical needs.

  • Amperage rating of 136 amps for efficient power output
  • Internal fan type for effective cooling
  • Clockwise (right) rotation direction
  • Includes an 8-groove serpentine pulley
  • External regulator type for reliable voltage control
  • Compatible with Dodge Ram 2500 and Ram 3500 models
  • Part number 13874N for precise identification

Technical Details and Features

This WAI alternator, part number 13874N, belongs to the Denso family of components, known for their durability and compatibility with various vehicle systems. The internal fan design helps maintain optimal operating temperatures, reducing wear and extending alternator life. Featuring a clockwise rotation direction, it matches the original equipment specifications for Dodge Ram 2500 and Ram 3500 trucks. The included pulley has 8 grooves and is designed for serpentine belts, ensuring smooth and efficient power transfer. The external regulator type allows for consistent voltage regulation, supporting stable electrical system performance.

Applications and Problem Solving

  • Replaces faulty or worn alternators in Dodge Ram 2500 and Ram 3500
  • Resolves issues with battery charging and electrical system failures
  • Addresses overheating problems with internal fan cooling
  • Fixes pulley or belt slippage due to worn or incompatible alternators
  • Improves voltage regulation for stable vehicle electrical operation

Installation Notes and Tips

When installing the WAI 13874N alternator, ensure the serpentine belt is properly aligned with the 8-groove pulley. Verify the rotation direction matches the vehicle’s original alternator to avoid compatibility issues. Since this alternator uses an external regulator, confirm the regulator connections are secure and functioning correctly. It is recommended to inspect the battery and electrical system during installation to ensure optimal performance.

Quality Assurance and Warranty

WAI alternators are manufactured to meet strict quality standards, ensuring reliable performance in demanding automotive applications. This alternator is built to OEM specifications for Dodge Ram 2500 and Ram 3500 models. Please refer to WAI’s warranty policy for coverage details related to part number 13874N.

BrandWAI
Part Number13874N
1212
Fan TypeInternal
Rotation DirectionClockwise (right)
Pulley IncludedYes
FamilyDenso
Pulley Groove Quantity8
Pulley Belt TypeSerpentine
Regulator TypeExternal
Decoupled Or Clutch PulleyNo
Amperage Rating136

This part fits 4 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2002DodgeRam 25005.9LL6N/A136 Amp Denso Unit
2002DodgeRam 35005.9LL6N/A136 Amp Denso Unit
2001DodgeRam 25005.9LL6N/A136 Amp Denso Unit, From 06/26/00
2001DodgeRam 35005.9LL6N/A136 Amp Denso Unit, From 06/26/00

* 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:

0 124 525 00511314121000-4481138745104772AA56027221AD56027221AD156028239AB

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