Remanufactured Cummins ISX 15.0L (912 ci) Engine For Sale
1998–present — 400–600 hp | 1,450–2,050 lb-ft
The Cummins ISX (Interact System X) is the most popular heavy-duty diesel engine in North America. Introduced in 1998 as a replacement for the legendary N14, the ISX was designed from the ground up to...
Starting from $8,000 – $15,000 — 1-Year Unlimited Mileage Warranty
Cummins ISX Technical Specifications
About the Cummins ISX Engine
The Cummins ISX (Interact System X) is the most popular heavy-duty diesel engine in North America. Introduced in 1998 as a replacement for the legendary N14, the ISX was designed from the ground up to meet future emissions standards while delivering class-leading power and fuel economy. The ISX uses Cummins' proprietary XPI fuel system, which operates at pressures up to 36,000 PSI for precise fuel atomization and efficient combustion. With horsepower ratings from 400 to 600 hp and torque up to 2,050 lb-ft, the ISX powers the majority of Class 8 trucks on American highways. In 2017, Cummins rebranded the ISX15 as the X15, but the core architecture remains the same. The ISX has earned a reputation for durability, with many engines exceeding 1,000,000 miles before requiring an overhaul.
Cummins ISX Strengths
- Dominant market share — parts and service expertise widely available
- XPI fuel system delivers excellent fuel economy at highway speeds
- Variable geometry turbo provides strong low-end torque for loaded starts
- Proven million-mile durability with proper maintenance
- Available in a wide range of horsepower ratings for any application
- Compatible with all major truck OEMs (Peterbilt, Kenworth, Freightliner, International)
Common Cummins ISX Issues (Addressed in Our Remanufactured Engines)
- EGR cooler failure on 2002–2010 models can cause coolant loss and overheating
- Injector tip erosion on high-mileage engines leads to power loss and smoke
- Turbo actuator failure on VGT-equipped models causes limp mode
- Aftertreatment system (DPF/SCR) issues on 2010+ models require periodic maintenance
- Cam roller follower wear on pre-2010 models can cause ticking and eventual failure
- Head gasket failures on some model years due to cylinder liner protrusion issues
Vehicles with the Cummins ISX
Available Cummins ISX Remanufactured Engines
Cummins ISX Buying Guide
When purchasing a remanufactured Cummins ISX, verify the emissions level (pre-EGR, EGR, or SCR) matches your truck's model year. Pre-2002 ISX engines without EGR are the simplest and most sought-after. A quality remanufactured ISX should include new injectors, a rebuilt turbo, new cam followers, and updated EGR components (if applicable). Ask about the specific horsepower rating — ISX engines range from 400 to 600 hp, and the correct rating must match your truck's ECM programming.
Frequently Asked Questions — Cummins ISX
How much does a remanufactured Cummins ISX engine cost?
A remanufactured Cummins ISX 15.0L engine typically costs between $8,000 and $15,000 depending on the model year, emissions configuration, and horsepower rating. Pre-EGR models (1998-2002) are generally less expensive, while newer SCR-equipped models (2010+) cost more due to additional emissions components. At US Engine Production, all ISX engines are fully dyno tested and backed by our comprehensive warranty. Call (631) 991-7700 for an exact quote.
Is the Cummins ISX a good engine?
Yes, the Cummins ISX is an excellent engine and the most popular heavy-duty diesel in North America for good reason. It offers a proven combination of power, fuel economy, and durability. Many ISX engines have exceeded 1,000,000 miles with proper maintenance. The ISX's wide availability also means parts and service expertise are readily available at virtually every truck stop and dealer in the country.
What are common Cummins ISX problems?
The most common ISX issues depend on the model year. Pre-2010 models are known for EGR cooler failures, cam roller follower wear, and injector tip erosion. 2010+ models with aftertreatment systems can experience DPF clogging and SCR sensor failures. Our remanufactured ISX engines address all known issues with updated components and thorough testing.
What trucks use the Cummins ISX engine?
The Cummins ISX powers the majority of Class 8 trucks in North America including Peterbilt 389/579/567, Kenworth W900/T680/T880, Freightliner Cascadia/Coronado, International ProStar/LoneStar, and select Volvo VNL configurations. It is also used in heavy equipment and marine applications.
How many miles can a Cummins ISX last?
A well-maintained Cummins ISX can last 750,000 to over 1,000,000 miles before requiring a major overhaul. The ISX was specifically designed for long-haul applications where million-mile durability is expected. Key maintenance items include regular oil changes, coolant system service, and injector replacement at recommended intervals.
What is the difference between ISX and X15?
The Cummins X15 is essentially a rebranded and updated version of the ISX15. In 2017, Cummins renamed the ISX15 to X15 with some improvements to fuel economy and emissions technology, but the core engine architecture is the same. Parts are largely interchangeable between late-model ISX15 and X15 engines.
Cummins Troubleshooting Guides
Cummins ISX Problems
6 common ISX issues: EGR cooler, injectors, cam followers, turbo failures.
Read Guide →Cummins ISB / B6.7 Problems
EGR, turbo VGT, injector, DPF/SCR, and oil leak issues explained.
Read Guide →Diesel Engine Cost Guide
Complete pricing for remanufactured Cummins engines by model.
Read Guide →Reman vs Rebuilt Engines
Which option is right for your Cummins? Compare quality, cost, and warranty.
Read Guide →Installation Guide
Step-by-step guide for installing your remanufactured Cummins engine.
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