Cummins 1998.5–2002 & 2004.5–2026 Ram 5.9L & 6.7L Cummins Coolant Temperature Sensor (4954905)
Description
An inaccurate coolant temperature sensor can cause poor engine performance, hard starts, excessive fan operation, reduced fuel economy, false temperature readings, and Check Engine Light conditions.
The Cummins 4954905 Coolant Temperature Sensor is a genuine OEM replacement designed for 1998.5–2002 and 2004.5–2026 Ram 5.9L & 6.7L Cummins engines. The sensor continuously monitors engine coolant temperature and sends this information to the ECM, allowing it to properly control fuel delivery, cold-start strategy, cooling fan operation, and overall engine performance.
Whether you're diagnosing a coolant temperature fault, replacing a failed sensor, or performing preventative maintenance, installing a genuine Cummins sensor restores factory accuracy and reliability.
Features
- Genuine Cummins OEM sensor
- Cummins Part Number: 4954905
- Fits 1998.5–2002 & 2004.5–2026 Ram 5.9L & 6.7L Cummins
- Direct OEM replacement
- Factory-calibrated sensor
- Provides accurate coolant temperature readings
- Helps maintain proper engine operation
- Plug-and-play installation
- OEM quality and reliability
Why Replace the Coolant Temperature Sensor?
The ECM relies on accurate coolant temperature data for numerous engine functions.
When the sensor begins to fail, common symptoms may include:
- Check Engine Light
- Hard starting
- Extended cold-start operation
- Cooling fan running continuously or at incorrect times
- Poor fuel economy
- Incorrect temperature gauge readings
- Reduced engine performance
Replacing the sensor restores accurate coolant temperature information, allowing the ECM to properly manage engine operation.
Glacier Tech Tip
A failed coolant temperature sensor doesn't always cause the engine to overheat.
In many cases, the ECM assumes the engine is either much colder or much hotter than it actually is. This can cause excessive fan operation, poor fuel economy, hard starting, or unnecessary diagnostic trouble codes.
Before replacing the sensor, inspect the electrical connector for corrosion, coolant contamination, damaged terminals, or wiring issues, as these problems can mimic a failed sensor.
Why Choose Genuine Cummins Parts?
Coolant temperature sensors play a critical role in engine management.
Genuine Cummins sensors are engineered to OEM specifications for precise calibration, durability, and long service life. They install directly into the factory location and communicate properly with the ECM without the calibration issues sometimes found in aftermarket replacements.
Applications
Fits:
- 1998.5–2002 Dodge Ram 2500 & 3500 5.9L Cummins
- 2004.5–2007 Dodge Ram 2500 & 3500 5.9L Cummins
- 2007.5–2026 Ram 2500, 3500, 4500 & 5500 6.7L Cummins
Note: Does not fit 2003–2004 early Common Rail applications. Fits 1998.5–2002 and 2004.5–2026 applications only.
Kit Contents
Includes:
- (1) Genuine Cummins Coolant Temperature Sensor
- Cummins Part Number: 4954905
Important Notes
- Genuine Cummins OEM replacement sensor.
- Fits 1998.5–2002 & 2004.5–2026 Ram 5.9L & 6.7L Cummins applications.
- Direct plug-and-play replacement.
- Inspect the electrical connector before installation.
- Clear any stored diagnostic trouble codes after replacement if necessary.
- Verify coolant level after installation and inspect for leaks around the sensor.
Common Failure Point
Over time, repeated heat cycles and vibration can cause the internal electronics of the coolant temperature sensor to degrade. When the sensor sends inaccurate data to the ECM, engine performance and cooling system operation may be affected even though the cooling system itself is functioning properly.
Replacing the sensor with a genuine Cummins unit restores accurate coolant temperature monitoring and helps ensure proper engine management.
Complete Your Repair
While servicing your cooling system, consider replacing:
- Thermostat
- Upper & Lower Radiator Hoses
- Coolant Overflow Cap
- Replacement Cummins Sensors and Seals
- Cooling System O-Rings
- Fresh OEM-Approved Engine Coolant
- Coolant Temperature Sensor Connector Repair Kit
Cummins 1998.5–2002 & 2004.5–2026 Ram 5.9L & 6.7L Cummins Coolant Temperature Sensor (4954905)
Description
An inaccurate coolant temperature sensor can cause poor engine performance, hard starts, excessive fan operation, reduced fuel economy, false temperature readings, and Check Engine Light conditions.
The Cummins 4954905 Coolant Temperature Sensor is a genuine OEM replacement designed for 1998.5–2002 and 2004.5–2026 Ram 5.9L & 6.7L Cummins engines. The sensor continuously monitors engine coolant temperature and sends this information to the ECM, allowing it to properly control fuel delivery, cold-start strategy, cooling fan operation, and overall engine performance.
Whether you're diagnosing a coolant temperature fault, replacing a failed sensor, or performing preventative maintenance, installing a genuine Cummins sensor restores factory accuracy and reliability.
Features
- Genuine Cummins OEM sensor
- Cummins Part Number: 4954905
- Fits 1998.5–2002 & 2004.5–2026 Ram 5.9L & 6.7L Cummins
- Direct OEM replacement
- Factory-calibrated sensor
- Provides accurate coolant temperature readings
- Helps maintain proper engine operation
- Plug-and-play installation
- OEM quality and reliability
Why Replace the Coolant Temperature Sensor?
The ECM relies on accurate coolant temperature data for numerous engine functions.
When the sensor begins to fail, common symptoms may include:
- Check Engine Light
- Hard starting
- Extended cold-start operation
- Cooling fan running continuously or at incorrect times
- Poor fuel economy
- Incorrect temperature gauge readings
- Reduced engine performance
Replacing the sensor restores accurate coolant temperature information, allowing the ECM to properly manage engine operation.
Glacier Tech Tip
A failed coolant temperature sensor doesn't always cause the engine to overheat.
In many cases, the ECM assumes the engine is either much colder or much hotter than it actually is. This can cause excessive fan operation, poor fuel economy, hard starting, or unnecessary diagnostic trouble codes.
Before replacing the sensor, inspect the electrical connector for corrosion, coolant contamination, damaged terminals, or wiring issues, as these problems can mimic a failed sensor.
Why Choose Genuine Cummins Parts?
Coolant temperature sensors play a critical role in engine management.
Genuine Cummins sensors are engineered to OEM specifications for precise calibration, durability, and long service life. They install directly into the factory location and communicate properly with the ECM without the calibration issues sometimes found in aftermarket replacements.
Applications
Fits:
- 1998.5–2002 Dodge Ram 2500 & 3500 5.9L Cummins
- 2004.5–2007 Dodge Ram 2500 & 3500 5.9L Cummins
- 2007.5–2026 Ram 2500, 3500, 4500 & 5500 6.7L Cummins
Note: Does not fit 2003–2004 early Common Rail applications. Fits 1998.5–2002 and 2004.5–2026 applications only.
Kit Contents
Includes:
- (1) Genuine Cummins Coolant Temperature Sensor
- Cummins Part Number: 4954905
Important Notes
- Genuine Cummins OEM replacement sensor.
- Fits 1998.5–2002 & 2004.5–2026 Ram 5.9L & 6.7L Cummins applications.
- Direct plug-and-play replacement.
- Inspect the electrical connector before installation.
- Clear any stored diagnostic trouble codes after replacement if necessary.
- Verify coolant level after installation and inspect for leaks around the sensor.
Common Failure Point
Over time, repeated heat cycles and vibration can cause the internal electronics of the coolant temperature sensor to degrade. When the sensor sends inaccurate data to the ECM, engine performance and cooling system operation may be affected even though the cooling system itself is functioning properly.
Replacing the sensor with a genuine Cummins unit restores accurate coolant temperature monitoring and helps ensure proper engine management.
Complete Your Repair
While servicing your cooling system, consider replacing:
- Thermostat
- Upper & Lower Radiator Hoses
- Coolant Overflow Cap
- Replacement Cummins Sensors and Seals
- Cooling System O-Rings
- Fresh OEM-Approved Engine Coolant
- Coolant Temperature Sensor Connector Repair Kit