For fleets running REV Group vehicles with Cummins ISL engines, keeping the SCR (Selective Catalytic Reduction) system operating cleanly and reliably is essential. A key part of that control loop is the DEF (Diesel Exhaust Fluid) head unit. The DEF Head Unit designed to OEM 719006 specifications isn’t merely a sensor—it’s the gatekeeper of accurate urea dosing and emissions compliance. If it fails or drifts out of spec, your engine may respond with warning codes, derates, or degraded performance.
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Measures DEF fluid level, temperature, and urea concentration, supplying real-time data back to the engine’s control module
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Adjusts dosing of DEF into the exhaust stream precisely to allow the SCR system to reduce NOx effectively
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Built to OEM 719006 tolerances, enabling plug-and-play compatibility with REV Group Cummins ISL systems
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Helps prevent fault codes, check engine warnings, and engine derates caused by sensor drift or inaccurate feedback
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Equipped with internal filtration to help guard against contamination upstream in the system
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Designed to handle real-world stresses: vibration, temperature swings, and exposure to DEF fluid chemistry
In operations where downtime is costly, overlooking the DEF head unit is a risky gamble. Installing a high-quality, OEM-matched unit restores the integrity of your emissions feedback loop, ensures consistent SCR efficiency, and reduces the chance of surprise system faults. For REV Group ISL applications, this DEF Head Unit isn’t optional—it’s foundational.