Autocar Cummins ISB 6.7L, B6.7 DEF Head Unit

Emissions Control Restored for Autocar Cummins ISB 6.7L / B6.7: OEM DEF Head Unit (602065)

What is it?
The OEM 602065 DEF Head Unit is a DEF (Diesel Exhaust Fluid) header assembly remanufactured by Tamerx (part 2321‑18‑1) for Autocar trucks powered by Cummins ISB 6.7L or B6.7 engines. It provides the mounting location and sensor interface for monitoring DEF system operation and maintaining emission control.

Why choose this OEM DEF Head Unit?
This unit is remanufactured to meet OEM specifications for fit, seal, and sensor calibration. It ensures seamless integration with your engine’s SCR emissions system, avoiding common DEF‑system issues like leaks, warning codes, or improper fluid monitoring that often arise with non‑OEM parts. The OEM fit also means no modifications are needed when replacing the part.

Key Benefits
 ✅ Direct OEM fit for Autocar Cummins ISB 6.7L / B6.7 applications
 ✅ Built to meet OEM sealing, sensor, and header standards
 ✅ Helps prevent DEF leakage, warning lights, or false diagnostics
 ✅ Comes with a 1,000,000‑mile or 1‑year warranty for reliability
 ✅ Compatible with existing DEF plumbing and electrical connections

Applications
Used in Autocar trucks equipped with Cummins ISB 6.7L / B6.7 engines that require reliable DEF tank sensor operation. Common in medium‑duty vocational, city service, municipal, and fleet applications where emission compliance and DEF system reliability are critical.

Installation Notes
Have installation completed by experienced technicians. First, depressurize or disable the DEF system; inspect and clean DEF tank connection area; replace any old seals or O‑rings. Install the unit according to OEM torque specifications. Once installed, verify DEF level readings and system behavior through diagnostics, and clear any related error codes.

Final Thoughts
If your Autocar ISB 6.7L or B6.7 is showing DEF warnings, erratic fluid level readings, or leaks around the DEF head unit, the OEM 602065 provides a dependable, OEM‑matched solution. Restored functionality helps maintain emission compliance, engine performance, and fleet uptime.