Four Seasons 37861 Engine Coolant Temperature Sensor

Engine Coolant Temperature Sensor for Hyundai and Kia

Four Seasons 37861 is an engine coolant temperature sensor for a wide range of Hyundai and Kia applications, with additional coverage for select Dodge-badged models. It uses a female rectangular connector, 3 terminals, and a 3/8" pipe thread size for direct replacement service on listed vehicles.

Built to meet or exceed OEM requirements, this Coolant Temp Sensor is a practical choice when you need accurate coolant temperature input for engine management and gauge operation. Four Seasons 37861 is listed for many Hyundai Elantra, Sonata, Tucson, Accent, and Kia Rio, Soul, Forte, and Optima applications.

Key Features

• Four Seasons Coolant Temp Sensor, part number 37861
• Female rectangular connector with 3 terminals
• 3/8" pipe thread size, 43/64" x 18
• Meets or exceeds OEM specifications
• Direct-fit style for listed Hyundai, Kia, and select Dodge applications
• Cross-reference example: Genuine 3922038030

Detailed Product Information

This engine coolant temperature sensor monitors coolant temperature and sends the signal used by the vehicle’s control system. On applications such as Hyundai Elantra, Hyundai Sonata, Kia Rio, Kia Soul, and Kia Forte, the sensor helps maintain proper temperature reporting for drivability and engine control. Four Seasons 37861 is designed as a coolant temp sensor replacement for vehicles across the 2000-2019 model years shown in the fitment data.

The Four Seasons Coolant Temp Sensor line focuses on direct replacement coverage for cooling-system sensor service. This part number, 37861, matches multiple OE and aftermarket references and is listed for thermostat-housing locations on select applications such as 2018-2019 Hyundai Accent and 2011 Kia Sedona.

What It Helps Address

• Incorrect coolant temperature readings
• Illuminated engine temperature or check engine warnings tied to sensor faults
• Rough idle or drivability issues related to inaccurate temperature input
• Hard starting or poor warm-up behavior caused by a failing coolant temp sensor
• Cooling-system service needs on Hyundai and Kia vehicles with the listed connector and thread style

Installation Notes and Fitment Tips

Fits 2018-2019 Hyundai Accent, N/A; located on thermostat housing. Fits 2013-2019 Hyundai Elantra GT, N/A. Fits 2019 Hyundai Veloster, N/A. Fits 2012-2017 Hyundai Veloster, N/A. Fits 2001-2018 Hyundai Elantra, N/A. Fits 2006-2018 Kia Rio, N/A. Fits 2010-2018 Kia Soul, N/A. Fits 2015-2018 Kia Soul EV, N/A. Fits 2006-2017 Hyundai Accent, N/A. Fits 2000-2003 Hyundai Accent, N/A. Fits 2016-2017 Hyundai Sonata, N/A. Fits 2003-2010 Hyundai Sonata, N/A. Fits 2014-2017 Hyundai Tucson, N/A. Fits 2005-2009 Hyundai Tucson, N/A. Fits 2014-2017 Kia Forte, N/A. Fits 2014-2017 Kia Forte Koup, N/A. Fits 2014-2017 Kia Forte5, N/A. Fits 2015-2017 Kia K900, N/A. Fits 2016-2017 Kia Optima, N/A. Fits 2001-2010 Kia Optima, N/A. Fits 2015-2016 Hyundai Genesis, N/A. Fits 2010-2016 Hyundai Genesis Coupe, N/A. Fits 2006-2014 Dodge Attitude, N/A. Fits 2013-2014 Hyundai Elantra Coupe, N/A. Fits 2007-2012 Hyundai Veracruz, N/A. Fits 2012 Kia Sedona, N/A. Fits 2002-2010 Kia Sedona, N/A. Fits 2006-2011 Hyundai Azera, N/A. Fits 2006-2011 Kia Rio5, N/A. Fits 2011 Kia Sedona, N/A; located on thermostat housing. Fits 2009-2010 Kia Borrego, N/A. Fits 2007-2010 Kia Rondo, N/A. Fits 2005-2010 Kia Sportage, N/A. Fits 2001-2009 Hyundai Santa Fe, N/A. Fits 2004-2009 Kia Amanti, N/A. Fits 2003-2009 Kia Sorento, N/A. Fits 2002-2009 Kia Spectra, N/A. Fits 2005-2009 Kia Spectra5, N/A. Fits 2007-2008 Hyundai Entourage, N/A. Fits 2003-2008 Hyundai Tiburon, N/A. Fits 2004-2006 Dodge Verna, N/A. Fits 2002-2005 Hyundai XG350, N/A. Fits 2005 Kia Rio, N/A; from 6/05. Fits 2001-2002 Hyundai Sonata, N/A; 3 term. Fits 2001 Hyundai XG300, N/A.

Before installation, confirm the connector shape, terminal count, and 3/8" pipe thread size against the original sensor. Verify the sensor location on the thermostat housing where noted in the fitment data, and compare the OE part number if available.

Quality Assurance

Four Seasons lists this coolant temperature sensor as meeting or exceeding OEM requirements. The part is supported by multiple interchange references, including Genuine 3922038030, which helps confirm application matching for listed Hyundai and Kia cooling-system service.