Precision in Emissions: REV Group Cummins ISL DEF Head Unit (OEM 719006)
In today’s regulated environment, every component of your emissions system must deliver accuracy—and the DEF (Diesel Exhaust Fluid) head unit is no exception. For REV Group vehicles powered by the Cummins ISL engine, the OEM 719006 DEF Head Unit is a critical sensor and control point that ensures your SCR (Selective Catalytic Reduction) system receives reliable feedback. A failing or miscalibrated head can lead to warning codes, engine derates, or emissions faults just when you need your vehicle most.
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Continuously measures DEF fluid level, temperature, and urea concentration, relaying precise data to the ECU
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Controls exact dosing of DEF into the exhaust stream to enable efficient NOx reduction
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Designed to meet OEM 719006 tolerances, allowing plug-and-play compatibility with REV / Cummins ISL systems
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Helps prevent fault codes, system warnings, and engine power restrictions caused by drifting sensor readings
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Built to resist vibration, thermal cycling, and exposure to DEF’s corrosive nature
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Includes internal filtration to protect injectors and plumbing from contamination
Many operators ignore DEF head maintenance until an emissions alarm forces their hand. But proactive replacement with the correct OEM 719006 DEF Head Unit restores sensor integrity, helps your SCR system perform optimally, and prevents surprise downtime. In the emissions chain, precision isn’t optional—this part ensures your system stays in balance.























































































































































































































































































