Cummins QSB 6.7L, B6.7 Temp Sensor 2018-2024: OEM 4384577

Accurate Temperature Sensing for Cummins QSB 6.7L & B6.7 Engines (2018–2024)

What is it?
The Cummins QSB 6.7L & B6.7 Temp Sensor (2018–2024), carrying OEM part number 4384577, is a precision engine sensor designed for Cummins QSB 6.7-liter and B6.7 diesel engines built between 2018 and 2024. This component measures temperature at a designated point—such as in the exhaust or coolant circuit—and sends real-time data to the engine control unit (ECU), which uses that information to adjust combustion and emissions-related processes.

Why choose this Temp Sensor?
Built to meet Cummins’ original specifications for these engine platforms, this sensor ensures accurate temperature feedback and dependable integration with engine control and aftertreatment systems. When a temperature sensor fails or delivers incorrect information, it can cause timing irregularities, inefficient combustion, suboptimal aftertreatment behavior, or emissions warnings. Choosing the correct OEM-specified sensor helps preserve reliable feedback for optimal engine and emissions coordination.

Key Benefits
✅ Designed for Cummins QSB 6.7L and B6.7 engines (2018–2024)
✅ Provides precise temperature data to the ECU
✅ Supports coordinated combustion and aftertreatment adjustments
✅ Direct replacement — no modifications required
✅ Engineered for demanding heat and heavy-duty operating conditions

Applications
This temperature sensor fits medium- and heavy-duty vehicles and equipment powered by Cummins QSB 6.7L or B6.7 engines manufactured between 2018 and 2024. It’s commonly found in commercial trucks, construction machines, agricultural units, generators, and other platforms where accurate temperature feedback is essential to efficient engine and emissions system performance.

Installation Notes
Ensure the engine and exhaust components have fully cooled before beginning service. Locate the temperature sensor, disconnect the electrical connector, and remove the old unit. Check the sensor port and wiring harness for contamination or wear before installing the new sensor. Secure the new unit to the recommended torque and reconnect the wiring. After installation, clear any stored fault codes and verify correct temperature readings using appropriate diagnostics.

Final Thoughts
If your Cummins-equipped vehicle shows temperature-related fault codes, erratic aftertreatment behavior, or irregular combustion responses, replacing a worn or faulty temperature sensor with the correct OEM-specified unit can help restore accurate thermal feedback and smoother system operation. The Cummins QSB 6.7L & B6.7 Temp Sensor (OEM 4384577) plays a key role in maintaining dependable engine and emissions system coordination across demanding duty cycles.