Remanufactured International N13 12.4L (758 ci) Engine
2016–present — 410–475 hp | 1,450–1,750 lb-ft
The Navistar N13 is a 12.4-liter inline-six heavy-duty diesel engine that represents Navistar's partnership with Cummins for engine technology. Introduced in 2016, the N13 is based on Cummins engine a...
Starting from $9,000 – $16,000 — 1-Year Unlimited Mileage Warranty
International N13 Technical Specifications
About the International N13 Engine
The Navistar N13 is a 12.4-liter inline-six heavy-duty diesel engine that represents Navistar's partnership with Cummins for engine technology. Introduced in 2016, the N13 is based on Cummins engine architecture and is manufactured at Navistar's Huntsville, Alabama engine plant. The N13 was designed to replace the MaxxForce 13 and address the reliability concerns that plagued Navistar's proprietary EGR-only emissions strategy. The engine features Cummins' proven XPI (Extreme Pressure Injection) fuel system operating at up to 36,000 PSI — the highest injection pressure in its class — for precise fuel atomization and clean combustion. The Holset variable geometry turbocharger provides excellent boost response and high-altitude performance. The N13 uses a full SCR aftertreatment system from the start, avoiding the EGR-heavy approach that caused issues with the MaxxForce series. This engine has quickly established itself as a reliable and efficient option for Class 8 applications, offering International truck buyers a competitive alternative to the Cummins X15 and Detroit DD15. The N13 is particularly popular in vocational and regional haul applications where its 12.4L displacement provides an ideal balance of power and fuel efficiency compared to larger 15L engines.
International N13 Strengths
- Cummins-based architecture provides proven reliability and extensive parts availability
- XPI fuel system with 36,000 PSI injection pressure — highest in class for clean combustion
- Full SCR aftertreatment from day one — no EGR-only reliability concerns
- Holset VGT turbo delivers excellent boost response and high-altitude performance
- 12.4L displacement offers better fuel economy than 15L engines for regional/vocational duty
- Manufactured by Navistar with Cummins technology — dual service network support
- Lower weight than 15L engines improves payload capacity for weight-sensitive applications
Common International N13 Issues (Addressed in Our Remanufactured Engines)
- Aftertreatment system (DPF/SCR) maintenance requirements including DEF quality issues
- EGR valve carbon buildup on some early production models
- Turbo actuator calibration issues on some 2016–2017 models requiring software updates
- Coolant system issues including water pump failures on some early models
- Exhaust backpressure sensor failures triggering false DPF codes
- Minor oil seepage from valve cover gaskets on some model years
Vehicles with the International N13
Available International N13 Remanufactured Engines
International N13 Buying Guide
The Navistar N13 is one of the most reliable heavy-duty engines available today, thanks to its Cummins-based architecture and full SCR emissions system. When purchasing a remanufactured N13, verify the model year and software calibration level — 2018+ models have improved ECM calibrations that optimize fuel economy and aftertreatment performance. A quality remanufactured N13 should include new or rebuilt XPI injectors, a rebuilt Holset VGT turbocharger, updated EGR components, and all new bearings and seals. The N13 benefits from Cummins parts availability, making it easier and less expensive to maintain than proprietary engines. For owner-operators and fleets running International LT or HX trucks, the N13 is an excellent choice that combines Cummins reliability with International truck integration.
Frequently Asked Questions — International N13
How much does a remanufactured Navistar N13 engine cost?
A remanufactured Navistar N13 12.4L engine typically costs between $9,000 and $16,000 depending on the model year and horsepower rating. The N13 is a newer engine with higher parts costs compared to the MaxxForce series. At US Engine Production, all N13 engines are fully tested and backed by our comprehensive warranty. Call (631) 991-7700 for an exact quote.
Is the Navistar N13 a Cummins engine?
The N13 is based on Cummins engine architecture and uses Cummins fuel system technology (XPI injectors) and turbocharger (Holset VGT). However, it is manufactured by Navistar at their Huntsville, Alabama plant and is calibrated specifically for International trucks. It shares many components with Cummins engines, which means excellent parts availability through both Navistar and Cummins dealer networks.
What replaced the MaxxForce 13?
The Navistar N13 replaced the MaxxForce 13 in 2016. The N13 uses Cummins-based architecture instead of Navistar's proprietary design, and features full SCR aftertreatment from the start — addressing the EGR reliability issues that plagued the MaxxForce series. The N13 is a significant improvement in reliability over the MaxxForce 13.
What trucks use the Navistar N13 engine?
The N13 is used in International LT Series, LoneStar, RH Series, HV Series, HX Series, and PayStar trucks. It is exclusive to Navistar/International Class 8 vehicles and is the primary engine option for International's current truck lineup.
How does the N13 compare to the Cummins X15?
The N13 (12.4L) is smaller than the Cummins X15 (15L) and offers lower power ratings (up to 475 hp vs 605 hp). However, the N13 is lighter, more fuel-efficient for regional and vocational applications, and less expensive to purchase and maintain. The X15 is better suited for heavy long-haul applications requiring maximum power, while the N13 excels in mixed-duty and regional operations.
How many miles can a Navistar N13 last?
The Navistar N13 is designed for a B50 life exceeding 1,000,000 miles, thanks to its Cummins-based architecture. With proper maintenance including regular oil changes, DEF system service, DPF cleaning, and turbo inspection, the N13 can deliver 500,000 to over 1,000,000 miles before requiring a major overhaul. The engine's proven Cummins components contribute to its long-term durability.