Accurate temperature monitoring is essential to the proper operation and longevity of modern diesel engines — and the Cummins ISX12 / QSX Temperature Sensor (OEM 4384812) plays a vital role in providing that critical data. For ISX12 and QSX engines built between 2014 and 2018, this sensor ensures the engine control system receives reliable temperature information, enabling correct adjustments for combustion, cooling, and emissions. Using the correct OEM sensor helps keep engine performance consistent, safe, and efficient.
This temperature sensor supports vital engine functions — here’s why it matters:
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Precise Temperature Monitoring – Continuously tracks engine or coolant temperature and delivers accurate readings to the control module for proper regulation.
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Prevents Overheating and Component Damage – By providing dependable temperature feedback, the sensor helps avoid overheating and protects internal engine parts from heat-related stress or damage.
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Supports Efficient Combustion and Emissions Control – With correct temperature data, the engine management system can optimize fuel delivery, timing, and emissions systems across different load and ambient conditions.
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OEM-Grade Fit and Durability – As OEM 4384812, this sensor meets original manufacturer specifications, ensuring proper installation, reliable performance, and long-term resistance to wear.
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Reduces Sensor-Related Faults and Diagnostic Errors – A functioning temperature sensor helps prevent false warnings or error codes, making diagnostics more dependable and avoiding unnecessary maintenance.
Replacing a failing or inaccurate temperature sensor is a smart step to ensure long-term reliability and performance of your diesel engine. The Cummins ISX12 / QSX Temperature Sensor (OEM 4384812) delivers accurate, OEM-standard monitoring, helping maintain optimal temperature control, protect critical components, and support efficient engine operation. For those seeking a trustworthy replacement part, Tamerx provides this sensor as a high-quality solution engineered for heavy-duty usage and long-term engine health.










































































































































































































