Fleet-Ready Emissions Control: Navistar/International Cummins DEF Head Unit
What is it?
The Navistar/International Cummins DEF Head Unit is a key SCR system component in medium- and heavy-duty International trucks powered by Cummins ISB, B6.7, or ISL engines. It oversees Diesel Exhaust Fluid (DEF) delivery into the exhaust stream to reduce NOx emissions. Onboard sensors monitor DEF level, temperature, and pressure to maintain dependable emissions performance time after time.
Why choose this OEM DEF Head Unit?
Designed specifically for International chassis equipped with Cummins engines, this component plugs directly into factory wiring and ECM setups—no modifications necessary. It helps prevent dosing irregularities, SCR fault codes, and engine derates frequently associated with aftermarket units. Trusted by fleets for durability and emissions compliance, it supports reliable uptime across diverse applications.
Key Benefits
✅ OEM-proven fit for Navistar and International trucks using Cummins ISB, B6.7, or ISL engines
✅ Balanced DEF flow ensures consistent NOx reduction and cleaner emissions
✅ Sensor-based monitoring of fluid level, temperature, and pressure helps guard against failures
✅ Withstands vibration, thermal stress, moisture, and DEF crystallization
✅ Helps avoid SCR errors, limp-mode issues, and operational downtime
Applications
Ideal for International service trucks, box carriers, and regional vocational rigs equipped with Cummins powerplants. This DEF Head Unit ensures emissions compliance during long-haul, city-stop cycles, and mixed-use fleet operations.
Installation Notes
Before installation, disconnect ignition and relieve DEF system pressure. Clean the DEF tank and fluid connections thoroughly to remove residue or crystallization. Install using OEM connectors and secure all plugs and fluid lines firmly. After setup, clear diagnostic codes and verify DEF dosing and sensor readings via a scan tool before returning to service.
Final Thoughts
When SCR alerts, dosing faults, or emissions non-compliance arise in your International/Cummins truck, this OEM DEF Head Unit delivers the on-point solution. Built for fleet standards and day-in, day-out reliability, it restores emission system stability and keeps your operations running clean and compliant—available now at Tamerx.