Navistar/International Cummins

Reliable DEF Head Unit for Navistar & International Cummins Systems

What Is It?

The OEM 2520612C1 DEF Head Unit is a remanufactured DEF tank module designed for Navistar and International vehicles equipped with Cummins engines. It includes fluid level, temperature, and suction sensors, and a dosing header assembly—serving as a central component of the SCR aftertreatment system.

Why Choose OEM 2520612C1?

Built to Navistar and Cummins specifications, this unit offers exact fitment and plug-and-play integration with factory DEF tanks and wiring harnesses. Pre-calibrated to OEM logic, it helps maintain emissions compliance and avoids DEF dosing errors and diagnostic faults.

Key Benefits

✅ Factory-calibrated for Navistar/International Cummins systems 
✅ Precise DEF monitoring of fluid level, temperature, and flow
✅ Integrated 40-micron filter header for clean fluid delivery 
✅ No modification required—direct-fit OEM replacement 
✅ Backed by a 1 million-mile / 1-year warranty from Tamerx 

Applications

This DEF head unit is commonly used in Navistar and International trucks and vans powered by Cummins diesel engines—typically Class 6–8 platforms equipped with SCR systems. It supports DEF delivery and system control across vocational and medium-duty operations.

Installation Notes

Installation should always be performed by a qualified technician. Inspect the DEF tank fittings, sensor connectors, and harness before installation. After replacing the unit, run a complete DEF system diagnostic using Navistar- or Cummins-approved tools to clear fault codes and confirm accurate DEF system readings.

Final Thoughts

The OEM 2520612C1 DEF Head Unit is a tested and validated solution for restoring emissions system function in Navistar/International Cummins vehicles. With factory-level calibration, durable design, and warranty coverage, it ensures accurate DEF delivery and system reliability under demanding fleet conditions.