OE Quality
60-Day Returns

BBB Industries N13874 Alternator
Reliable Alternator Replacement for Dodge Ram 2500 and 3500
The BBB Industries NEW ALTERNATOR N13874 is designed to provide consistent electrical charging performance for Dodge Ram 2500 and Ram 3500 trucks. Engineered to meet OEM specifications, this alternator ensures your vehicle's electrical system operates efficiently under demanding conditions.
- Amperage Rating: 136 amps for stable power output
- Cooling Method: Air-cooled with internal fan for effective heat dissipation
- Pulley Type: Conventional pulley with 8 grooves and 2-5/8 inch diameter
- Rotation Direction: Clockwise to match factory setup
- Voltage: 12 volts with external voltage regulator
- Polarity: Negative for proper electrical system compatibility
- OE Manufacturer: Nippondenso for trusted quality and fit
- Plug Clock Position: 3 o'clock for correct wiring alignment
- Pulley Belt Type: Serpentine belt compatible
About the BBB Industries NEW ALTERNATOR Product Line
The NEW ALTERNATOR line from BBB Industries focuses on delivering alternators that meet or exceed original equipment standards. This product line emphasizes durability and precise fitment, making it suitable for professional repairs and maintenance. The N13874 alternator is part of this line, offering reliable performance tailored for Dodge Ram heavy-duty trucks.
Detailed Product Description
This alternator features a 136-amp output, providing sufficient electrical power for the Dodge Ram 2500 and 3500 models. Its air cooling system with an internal fan helps maintain optimal operating temperatures, reducing the risk of overheating during extended use. The conventional pulley with 8 grooves and a 2-5/8 inch diameter is designed for serpentine belt systems, ensuring smooth power transfer. The clockwise rotation and negative polarity align with factory specifications, facilitating straightforward installation and reliable operation. Additionally, the external voltage regulator type supports consistent voltage control, protecting your vehicle's electrical components.
Common Applications and Issues Addressed
- Replacement for worn or failing alternators in Dodge Ram 2500 and 3500 trucks
- Resolves battery charging problems and electrical system malfunctions
- Addresses issues with dimming headlights or electrical accessory failures
- Fixes irregular voltage output affecting vehicle electronics
- Restores proper serpentine belt alignment and tension
Installation Notes and Tips
Ensure the alternator pulley matches the serpentine belt system on your Dodge Ram 2500 or 3500. Verify the plug clock position at 3 o'clock for correct electrical connections. Since this alternator uses an external voltage regulator, confirm compatibility with your vehicle's existing regulator setup. Follow manufacturer torque specifications when mounting the alternator to avoid damage.
Quality Assurance and Warranty
BBB Industries manufactures the NEW ALTERNATOR N13874 to meet OEM standards, with Nippondenso as the original equipment manufacturer. This alternator undergoes rigorous testing to ensure durability and performance. Please refer to BBB Industries' warranty policy for specific coverage details.
| Brand | BBB Industries |
| Part Number | N13874 |
| Position | NEW ALTERNATOR |
| Amperage Rating | 136 |
| AC Tap | No |
| Brushless Design | No |
| Cooling Method | Air |
| Decoupled Or Clutch Pulley | No |
| Fan Type | Internal |
| Number Of Pulley Grooves | 8 |
| OE Manufacturer | Nippondenso |
| One Wire Capable | No |
| Outside Pulley Diameter (in) | 2-5/8 |
| Outside Pulley Diameter (mm) | 66 |
| Plug Clock Position | 3 |
| Polarity | Negative |
| Pulley Belt Type | Serpentine |
| Pulley Included | Yes |
| Pulley Type | Conventional |
| Rotation Direction | Clockwise |
| Voltage (V) | 12 |
| Voltage Regulator Type | External |
This part fits 4 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2002 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | NDenso Unit; 136 Amps; NEW ALTERNATOR |
| 2002 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | NDenso Unit; 136 Amps; NEW ALTERNATOR |
| 2001 | Dodge | Ram 2500 | 5.9L | L6 | DIESEL | N/A | NDenso Unit; 136 Amps; NEW ALTERNATOR |
| 2001 | Dodge | Ram 3500 | 5.9L | L6 | DIESEL | N/A | NDenso Unit; 136 Amps; NEW ALTERNATOR |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.