Capacity Cummins ISB 6.7L DEF Head Unit

Next-Level DEF Precision: Capacity Cummins ISB 6.7L DEF Head Unit (OEM 909934)

What is it?
The Capacity Cummins ISB 6.7L DEF Head Unit (OEM 909934) is the dosing control module central to the SCR (Selective Catalytic Reduction) aftertreatment system on Cummins ISB 6.7L engines. It regulates Diesel Exhaust Fluid (DEF) injection by controlling flow rate, timing, and sensor feedback to ensure efficient NOx reduction.

Why Choose the Capacity Cummins ISB 6.7L DEF Head Unit (OEM 909934)?
This head unit is engineered to match factory calibration, sensor compatibility, and mechanical integration for the ISB 6.7L platform. Using a unit that aligns with OEM specifications ensures reliable communication with the ECU, reduces retrofit challenges, and maintains proper aftertreatment function.

Key Benefits
✅ Factory Calibration: Designed to meet the original dosing and sensor logic used by Cummins
✅ Corrosion-Tolerant Materials: Built to withstand exposure to DEF and harsh operating conditions
✅ Precise Dosing Control: Maintains accurate fluid delivery across engine loads and conditions
✅ Minimized Faults: Helps prevent code triggering due to dosing errors or misalignment
✅ System Protection: Correct DEF management benefits catalysts, sensors, and downstream exhaust components

Applications
This DEF head unit is suited for vehicles and machinery powered by Cummins ISB 6.7L engines that use SCR systems. Typical applications include medium-duty trucks, commercial fleet units, and industrial equipment where emission compliance is necessary.

Installation Notes
Installation should be performed by trained technicians. Critical steps include securing all hydraulic and electrical connections, ensuring seals are tight, and preventing leaks. Following installation, clear any error codes and verify that the ECU is reading the head unit properly under varied operating conditions.

Final Thoughts
Proper DEF dosing is vital to your engine’s emissions health. The Capacity Cummins ISB 6.7L DEF Head Unit (OEM 909934) provides a factory-matched, durable solution to restore accurate reductant control and support steady, compliant operation.