Autocar Cummins ISX

Factory Fresh DEF Head Unit for Autocar with Cummins ISX

What Is It?

The DEF Head Unit OEM 5410‑22‑FA01‑1 is a remanufactured, factory-calibrated module tailored for Autocar severe-duty trucks equipped with Cummins ISX engines. It delivers precise Diesel Exhaust Fluid monitoring and control—including fluid level, temperature, suction flow sensing, and a robust 40 µm dosing header.

Why Choose OEM 5410‑22‑FA01‑1?

Designed to meet Cummins and Autocar original standards, this unit integrates flawlessly with the factory DEF tank, wiring harness, and engine control system. Its plug‑and‑play fitment and pre-tuned calibration help prevent diagnostic faults and ensure consistent SCR operation. 

Key Benefits

✅ Engineered for Autocar chassis with Cummins ISX engines 
✅ Accurate DEF monitoring: level, temp, suction & flow control
✅ Built-in dosing header with 40 µm filter for clean fluid delivery
✅ Seamless resort to OEM wiring harness – no modifications needed
✅ Backed by Tamerx warranty (1 million miles or 1 year) with core return option 

Applications

Ideal for Class 7/8 Autocar trucks using Cummins ISX engines, commonly deployed in vocational, terminal-tractor, refuse, and concrete-conveyor roles. These units operate reliably in intensive usage environments demanding dependable DEF working conditions and emissions control. 

Installation Notes

Protect the warranty and system integrity by having a certified technician handle installation. Before mounting, inspect DEF tank fittings and the harness connector. After installation, perform a full system diagnostic using OEM-appropriate tools. Clear any fault codes and confirm accurate level and temperature readings in the ECM.

Final Thoughts

The OEM 5410‑22‑FA01‑1 DEF Head Unit delivers factory-grade emissions reliability for Autocar/Cummins ISX systems. With its direct-fit integration, accurate fluid sensing, and robust calibration, it’s a trusted solution engineered to maintain downtime-free emissions compliance and fleet readiness.