Cummins ISL, QSL 8.9L Temp Sensor 2013-2018: OEM 5461635

Accurate Thermal Monitoring for Cummins ISL & QSL 8.9L Engines (2013–2018)

What is it?
The Cummins ISL, QSL 8.9L Temp Sensor (2013–2018), identified by OEM part number 5461635, is a precision engine temperature sensor designed for Cummins ISL and QSL 8.9-liter diesel engines manufactured between 2013 and 2018. This sensor monitors temperature in the engine or emission-related systems and relays that information to the engine control unit (ECU), which uses it to adjust combustion parameters, aftertreatment behavior, and emissions strategies.

Why choose this Temp Sensor?
This temperature sensor is built to Cummins’ original specifications for the ISL and QSL 8.9L platforms, ensuring accurate readings and dependable integration with the engine’s control and aftertreatment systems. When a temperature sensor becomes worn or sends faulty data, the ECU may make incorrect adjustments to fuel delivery, regeneration timing, or emissions management, which can lead to system warnings or inconsistent engine behavior. Installing the correct OEM-specified sensor helps maintain accurate thermal feedback and promotes smoother, coordinated engine and emissions system operation.

Key Benefits
✅ Designed specifically for Cummins ISL and QSL 8.9L engines (2013–2018)
✅ Provides reliable temperature feedback to the engine ECU
✅ Supports optimized engine control and emissions adjustment strategies
✅ Direct replacement — no modifications required
✅ Built for high heat and heavy-duty duty cycles

Applications
This temperature sensor fits medium- and heavy-duty commercial trucks, vocational equipment, and other diesel-powered machinery equipped with Cummins ISL or QSL 8.9-liter engines from 2013 through 2018. It’s commonly used in delivery rigs, construction vehicles, regional transport equipment, industrial generators, and other platforms where precise temperature monitoring is essential for efficient operation.

Installation Notes
Before servicing, ensure the engine and exhaust system have fully cooled. Locate the existing temperature sensor, disconnect its electrical connector, and remove it from its mounting location. Inspect the sensor port and wiring harness for signs of soot buildup, corrosion, or damage before installing the new sensor. Install the replacement unit and torque it to the manufacturer’s specifications, then reconnect the electrical harness. After installation, clear any stored system codes and verify correct temperature behavior using diagnostic tools.

Final Thoughts
If your Cummins-equipped vehicle is displaying temperature-related fault codes, uneven combustion behavior, or inconsistent emissions feedback, replacing a worn or failing temperature sensor with the correct OEM-specified part can help restore accurate monitoring and smoother engine and emissions system performance. The Cummins ISL, QSL 8.9L Temp Sensor (OEM 5461635) plays a crucial role in dependable thermal feedback and coordinated engine operation across varied duty cycles.