When your heavy equipment or machinery runs a Terex chassis with a Cummins ISL engine, emissions compliance isn’t optional—you need every link in the system working right. The Terex Cummins ISL DEF Head Unit (OEM 37346, Tamerx part 5410-11-FC01-3) is one of those links you can’t ignore. It’s the device that monitors your DEF fluid and controls how much urea gets injected into the exhaust. If it fails or gives bad readings, your SCR system can’t do its job—and your machine may suffer derates or error codes.
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Detects DEF fluid level, temperature, and urea concentration and delivers that data to the engine control module
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Regulates precise dosing of DEF into the exhaust stream so the SCR (Selective Catalytic Reduction) system can reduce NOx properly
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Built to the OEM 37346 spec for direct fit and calibration with Terex / Cummins ISL systems
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Helps prevent fault codes, emissions warnings, or engine derates triggered by incorrect or drifting sensor data
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Designed for durability: vibration resistance, thermal cycling endurance, and DEF-fluid compatibility
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Field-friendly replacement minimizes downtime when you need to swap it out
Don’t wait for a warning light to let you know there’s a problem. Installing a reliable OEM 37346 Terex Cummins ISL DEF Head Unit ensures your emissions feedback loop stays accurate, your SCR system stays functional, and your machine stays compliant on every job. Treat this small component like a major system—it’s doing work you can’t afford to lose.



























































































































































































































































































