Transit-Tuned Emissions Control: TEMSA Cummins ISB 6.7 L DEF Head Unit
What is it?
The TEMSA Cummins ISB 6.7 L DEF Head Unit is a precision emissions control module engineered for TEMSA buses and coaches powered by Cummins ISB 6.7 L engines. It delivers accurate doses of Diesel Exhaust Fluid (DEF) into the exhaust stream to neutralize nitrogen oxides (NOx). With built-in sensors monitoring DEF fluid level, temperature, and pressure, it guarantees optimal SCR system performance even under the frequent idle-and-go cycles of transit duty.
Why choose the TEMSA-specific DEF Head Unit?
Tailored for TEMSA chassis fitted with Cummins engines, this OEM-certified component ensures plug-and-play integration with factory ECM calibration and wiring systems. It eliminates DEF dosing errors, SCR fault codes, and engine derates often caused by aftermarket parts. Built for transit operation with durable construction and consistent emissions control where uptime counts.
Key Benefits
✅ OEM-fit for TEMSA transit platforms powered by Cummins ISB 6.7 L engines
✅ Precision metering of DEF ensures maximum NOx reduction and regulatory compliance
✅ Continuous monitoring via embedded sensors for fluid level, temperature, and pressure
✅ Weather- and job-site–resistant against DEF crystallization, vibration, thermal cycling, and moisture
✅ Helps prevent SCR faults, limp-mode activation, and unscheduled transit downtime
Applications
Perfect for city, commuter, and regional transit buses built on TEMSA chassis with Cummins ISB 6.7 L diesel engines. This head unit maintains emissions compliance and SCR reliability across typical continuous-idle routes, stop-start traffic, and variable climate conditions.
Installation Notes
Prior to replacement, disconnect battery power and relieve pressure in the DEF system. Clean the DEF tank and fluid lines thoroughly to remove residue or crystallization. Install the new head unit using OEM connector fittings and securely fasten all fluid and electrical lines. After installation, clear any diagnostic codes and validate DEF dosing and sensor readings using a diagnostic scan tool.
Final Thoughts
If your TEMSA vehicle is experiencing DEF-related warnings, SCR derates, or sensor errors, the TEMSA Cummins ISB 6.7 L DEF Head Unit is the direct-fit, OEM-grade remedy you need. Built for transit reliability and emissions compliance—ready to ship from Tamerx.