Four Seasons 37909 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor Overview

Four Seasons 37909 is an engine coolant temperature sensor for monitoring coolant temperature in the cooling system. This Coolant Temp Sensor uses a female rectangular connector, 2 terminals, and a 3/8" pipe thread (43/64" x 18) for a direct-fit style replacement where this configuration is specified.

Built to meet or exceed OEM requirements, Four Seasons 37909 is a practical choice for drivers searching for an engine coolant temperature sensor, coolant temp sensor replacement, or Four Seasons 37909 for cooling-system service.

Key Features

• Engine coolant temperature sensor for cooling-system temperature monitoring
• Female rectangular connector for the specified electrical connection
• 2-terminal design
• 3/8" pipe thread size (43/64" x 18)
• Meets or exceeds OEM requirements
• Four Seasons Coolant Temp Sensor line

Detailed Product Information

The Four Seasons Coolant Temp Sensor line focuses on replacement sensors used to report coolant temperature to the vehicle’s engine management system. Part number 37909 is designed around the listed connector, terminal count, and thread specification, making it a straightforward option when replacing a worn or inaccurate coolant temperature sensor. Search terms such as engine coolant temperature sensor replacement, coolant temp sensor for Four Seasons 37909, and 3/8 pipe thread coolant sensor are commonly used by buyers looking for this type of part.

This part cross-references A14259 and CT0146 for the same application. Four Seasons 37909 is also referenced by interchange numbers including 1712624 and SU4628.

What It Helps Address

• Incorrect coolant temperature readings
• Check engine light concerns related to coolant temperature input
• Hard starting or rough running caused by faulty temperature data
• Cooling fan control issues tied to sensor signal errors
• Driveability problems from an aging engine coolant temperature sensor

Installation Notes and Tips

Verify the connector shape, terminal count, and thread size before installation. Confirm the sensor location on the engine or cooling passage matches the 3/8" pipe thread specification, and compare the original part number when servicing a vehicle such as Honda Civic or Toyota Corolla applications where coolant temperature sensor searches are common. For best results, inspect the connector and wiring for corrosion or damage before installing Four Seasons 37909.

Quality Assurance

Four Seasons lists this coolant temperature sensor as meeting or exceeding OEM requirements, supporting replacement use where original-equipment-level fit and function are needed. Part number 37909 is built for the specified sensor application and cooling-system service requirements.