Precision Emissions Control: TEMSA Cummins ISB 6.7L DEF Head Unit
What is it?
The TEMSA Cummins ISB 6.7L DEF Head Unit is a key module in the Selective Catalytic Reduction (SCR) system tailored for TEMSA buses and coaches powered by Cummins ISB 6.7L engines. It precisely regulates the injection of Diesel Exhaust Fluid (DEF) into the exhaust stream to neutralize nitrogen oxide (NOx) pollutants, while its integrated sensors monitor temperature, fluid level, and pressure to ensure accurate emissions control and system integrity.
Why choose a TEMSA-specific DEF Head Unit for ISB 6.7L applications?
Designed for seamless integration into TEMSA chassis with Cummins ISB 6.7L engines, this DEF Head Unit matches factory ECM calibration and connector architecture. That eliminates compatibility issues, retrofit modifications, or communication errors. Built to OEM-grade specifications, it helps prevent SCR fault codes, limp-mode operations, and emissions compliance failures—ensuring safe, reliable operation for fleets and operators.
Key Benefits
✅ Direct-fit compatibility with TEMSA buses running Cummins ISB 6.7L engines
✅ Delivers accurate DEF dosing for effective NOx reduction
✅ Sensors monitor DEF level, temperature, and pressure in real time
✅ Resistant to DEF crystallization, temperature cycling, and vibration
✅ Helps avoid SCR-related error codes and engine derates
Applications
This DEF Head Unit is designed specifically for TEMSA vehicles powered by Cummins ISB 6.7L engines, including passenger buses and specialty transport platforms. It ensures reliable emissions system performance under variable urban and regional operating conditions where precision emissions control is critical.
Installation Notes
Before installation, shut down and depressurize the DEF system. Clean the DEF tank and remove any crystallized residue to prevent sensor interference. Mount the DEF Head Unit using OEM-standard fasteners, connectors, and fluid lines, ensuring proper alignment and seals. After installation, clear any active fault codes and verify correct DEF dosing and sensor output using diagnostic tools.
Final Thoughts
If DEF-related faults, SCR warnings, or emissions issues are affecting your TEMSA designation with Cummins ISB 6.7L engines, this DEF Head Unit is a reliable OEM-grade fix. Engineered for precise emissions control and plug‑and‑play compatibility, it restores system performance and compliance. Available now through Tamerx—trusted parts shipped fast to keep your fleet on the road.