TEMSA Cummins

Emissions-Ready for Passenger Duty: TEMSA Cummins DEF Head Unit 

What is it?
The TEMSA Cummins DEF Head Unit is a core component of the SCR (Selective Catalytic Reduction) system in TEMSA buses equipped with Cummins ISB or B6.7 engines. It manages the controlled injection of Diesel Exhaust Fluid (DEF) into the exhaust stream to reduce harmful nitrogen oxide (NOx) emissions. With integrated sensors tracking fluid level, temperature, and pressure, it helps ensure consistent performance in stop-and-go transit environments.

Why choose this OEM DEF Head Unit?
Tailored for TEMSA bus platforms running Cummins engines, this OEM DEF Head Unit offers straightforward installation with factory harnesses and calibration. It reduces the chances of SCR malfunctions, DEF metering errors, and limp-mode triggers. Known for supporting daily passenger operations, it contributes to emissions compliance and reduces unplanned downtime.

Key Benefits
✅ Direct OEM compatibility for TEMSA Cummins systems
✅ Promotes consistent NOx reduction through stable DEF dosing
✅ Real-time sensor feedback on DEF level, pressure, and temperature
✅ Built to endure vibration, fluid crystallization, and weather exposure
✅ Helps avoid SCR-related fault codes and emissions compliance issues

Applications
Perfect for TEMSA transit and intercity buses powered by Cummins ISB or B6.7L engines. This DEF Head Unit supports cleaner operation, fewer maintenance issues, and greater confidence in daily fleet schedules.

Installation Notes
Start by powering down the electrical system and relieving pressure in the DEF circuit. Clean the DEF tank and all mating surfaces to avoid contamination. Use factory connectors to secure the new head unit in place, then inspect for leaks and run diagnostics to confirm accurate sensor readings and proper dosing behavior.

Final Thoughts
If your TEMSA bus is experiencing DEF system faults or performance concerns, this OEM DEF Head Unit is a dependable solution. Designed for fleet-ready service and long-term use, it's a smart replacement that helps keep transit operations running clean and smooth—available now at Tamerx.