Fleet-Grade Emissions Control: Navistar Cummins ISB 6.7L DEF Head Unit
What is it?
The Navistar/International Cummins ISB 6.7 L DEF Head Unit is a precision emissions module built for medium-duty International trucks equipped with Cummins ISB 6.7 L engines. It delivers accurate metering of Diesel Exhaust Fluid (DEF) into the exhaust system to neutralize nitrogen oxide (NOx) emissions. Integrated sensors continuously monitor fluid level, temperature, and pressure to guarantee dependable SCR system performance even under extended highway or vocational use.
Why choose an OEM Navistar/International DEF Head Unit?
Specifically engineered for International chassis paired with Cummins ISB engines, this DEF Head Unit provides plug-and-play compatibility with factory ECM calibration and wiring harnesses. It helps avoid DEF dosing errors, SCR fault codes, and engine derates that often accompany aftermarket components. Built for durability and long-term reliability, it’s ideally suited for demanding transport and service fleet applications.
Key Benefits
✅ OEM-fit solution for International trucks powered by Cummins ISB 6.7 L engines
✅ Precisely controls DEF dosing to satisfy emissions regulations
✅ Real-time sensor monitoring of DEF fluid level, temperature, and pressure
✅ Designed to resist DEF crystallization, vibration, thermal cycling, and dust
✅ Minimizes SCR system errors, limp-mode events, and unscheduled downtime
Applications
Ideal for International medium-duty chassis—including models like the HV Series, TerraStar, MV™, and CV Series—powered by Cummins ISB 6.7 L engines. This DEF Head Unit ensures consistent emissions control across fleet operations, regional haul, and vocational work cycles.
Installation Notes
Before installation, power down the truck and fully depressurize the DEF system. Clean the DEF tank and connection interfaces to remove residue or crystalline buildup. Install the unit using OEM connector fittings, securing all fluid lines and electrical connections. After installation, clear diagnostic codes and verify proper DEF dosing and sensor outputs using a diagnostic scan tool.
Final Thoughts
If your International truck equipped with a Cummins ISB 6.7 L engine is displaying DEF system errors, dosing irregularities, or SCR derates, the OEM Navistar/International DEF Head Unit is the dependable replacement you need. Built to OEM specifications and ready for heavy-duty operation, it restores emissions compliance and reliability—available now at Tamerx.