Capacity Cummins ISB 6.7L

Full-Feature DEF Head Unit for Capacity Cummins ISB 6.7L Engines

What Is It?

The OEM 911181 DEF Head Unit (also known as Tamerx part 4310‑18‑1) is a remanufactured emissions control module made for Cummins ISB 6.7L engines installed by Capacity systems. It manages DEF level sensing, temperature, suction, and heating in SCR-equipped applications such as school buses and shuttle vehicles.

Why Choose OEM 911181?

This unit is built to meet Cummins factory specifications and offers direct OEM fit without modification. It delivers accurate DEF delivery and monitoring, designed for the unique emissions demands of vehicle builds by Capacity, while backed by a one‑year or one‑million-mile warranty from Tamerx.

Key Benefits

✅ Designed specifically for Capacity Cummins ISB 6.7L installations
✅ Precise DEF level, temperature, and flow monitoring
✅ Factory-calibrated integration with vehicle ECM and harness
✅ Includes heating function to prevent DEF freezing
✅ Supported by Tamerx warranty for dependable service

Applications

This head unit is commonly found in buses, shuttles, and commercial vehicles using Capacity chassis paired with Cummins ISB 6.7L engines. It ensures emission systems remain accurate and reliable in school transit, municipal service, and passenger fleet platforms.

Installation Notes

Installation should be performed by a qualified technician. Inspect DEF tank connections, wiring harness, and sensor ports before installation. After mounting, use Cummins-compatible diagnostic tools to clear fault codes and confirm DEF level and temperature reporting accuracy.

Final Thoughts

The OEM 911181 DEF Head Unit provides factory-engineered DEF management tailored for Capacity Cummins ISB 6.7L systems. With precision fit, proven durability, and OEM warranties, it offers a quality solution to keep emission systems working properly and vehicles compliant.