Engineered for Public Transit Precision: TEMSA Cummins ISB 6.7 L DEF Head Unit
What is it?
The TEMSA Cummins ISB 6.7 L DEF Head Unit is an emissions-critical module integrated into the SCR (Selective Catalytic Reduction) system of TEMSA buses and coaches powered by Cummins ISB 6.7 L engines. It meters Diesel Exhaust Fluid (DEF) into the exhaust stream to effectively reduce nitrogen oxide (NOx) emissions, while onboard sensors monitor fluid level, temperature, and pressure to ensure consistent and accurate dosing across transit route cycles.
Why choose the TEMSA-specific DEF Head Unit?
Built exclusively for TEMSA chassis fitted with Cummins ISB engines, this OEM-grade unit offers plug-and-play installation with factory ECM calibration and wiring compatibility. It eliminates DEF dosing inconsistencies, SCR fault codes, and engine derates commonly caused by aftermarket parts. Designed for high idle and frequent stop-start cycles, it delivers reliable emissions compliance tailored to urban and regional transit needs.
Key Benefits
✅ Direct OEM fit for TEMSA vehicles powered by Cummins ISB 6.7 L
✅ Accurate DEF dosing ensures optimal NOx reduction
✅ Real-time monitoring of DEF fluid level, temperature, and pressure
✅ Resistant to DEF crystallization, thermal cycling, vibration, and moisture
✅ Helps prevent SCR system errors, limp-mode events, and downtime
Applications
Ideal for TEMSA transit buses and shuttle vehicles equipped with Cummins ISB 6.7 L engines. This DEF Head Unit guarantees emissions compliance and SCR system reliability during prolonged idle periods, frequent route start/stop operations, and varied climatic conditions.
Installation Notes
Power down the vehicle and fully depressurize the DEF system before replacing the unit. Clean the DEF tank and fluid lines thoroughly to eliminate residue or crystalline buildup. Install the new module using OEM connectors and ensure all electrical and fluid connections are securely fastened. After installation, clear diagnostic codes and verify DEF dosing accuracy and sensor performance using a diagnostic scan tool.
Final Thoughts
If your TEMSA bus is showing DEF system faults or SCR-related emissions errors, the OEM TEMSA Cummins ISB 6.7 L DEF Head Unit delivers a precise and dependable solution. Engineered for reliability and emissions accuracy, it restores DEF system performance and helps keep your fleet compliant and on schedule—available now at Tamerx.