Four Seasons 37859 Engine Coolant Temperature Sensor
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Four Seasons
 Coolant Temp Sensor

Four Seasons 37859 Engine Coolant Temperature Sensor

Brand Four Seasons 37859
Connector Gender Female
Connector Shape Oval
Description Coolant Temp Sensor
Fitting Thread Size No Threads/Clip In
Meets / Exceeds OEM? YES
Number of Terminals 2
Style Coolant Temp Sensor
Type Coolant Temp Sensor
Product line Coolant Temp Sensor
Fits Ford, Lincoln, Mazda, and Mercury · 229 vehicles

OE direct replacement. Meets OEM requirements for dependable cooling system sensing.

Clip-in fit. No threads for a simple, secure installation.

Female oval connector. 2-terminal design for a precise electrical connection.

Cross-references Four Seasons 37859, 1F2218840 and 1F6018840 for the same application. See all 17.

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Not what you need? See all Engine Coolant Temperature Sensor options

Engine Coolant Temperature Sensor for Ford and Lincoln

Four Seasons 37859 is an engine coolant temperature sensor built for direct replacement in a wide range of Ford, Lincoln, Mazda, and Mercury applications. It uses a female oval connector with 2 terminals and a no-threads, clip-in style for vehicles that use a push-in sensor design.

The Four Seasons Coolant Temp Sensor line focuses on accurate coolant temperature signal input for engine management and cooling system operation. This part meets or exceeds OEM requirements and is used across many Ford Focus, Ford Escape, Ford Explorer, and Lincoln MKZ applications.

Key Features

  • Part number: 37859
  • Engine coolant temperature sensor / coolant temp sensor
  • Female connector with oval shape
  • 2-terminal design
  • No threads, clip-in fitting style
  • Meets or exceeds OEM specifications
  • Direct replacement for many Ford, Lincoln, Mazda, and Mercury vehicles

Detailed Description

Four Seasons 37859 is an OE-style engine coolant temperature sensor that reports coolant temperature to the vehicle’s control system. Accurate temperature input is important for fuel control, cooling fan operation, and temperature-related engine strategy. This sensor is listed for broad coverage including 2011-2019 Ford Fiesta, 2012-2019 Ford Explorer, 2013-2019 Ford Escape, 2013-2017 Ford Fusion, 2013-2017 Lincoln MKZ, and 2015-2019 Lincoln MKC. It also cross-references Four Seasons 37859 for the same application.

Compatible vehicle coverage also includes long-tail searches such as Ford Focus coolant temp sensor replacement, Lincoln MKZ engine coolant temperature sensor, and Ford Explorer coolant temperature sensor for clip-in applications. The part number 37859 is also associated with multiple interchange references used across these platforms.

What It Helps Address

  • Incorrect coolant temperature readings
  • Cooling fan control concerns tied to temperature input
  • Hard starting or drivability issues related to sensor signal errors
  • Check engine light conditions involving coolant temperature data
  • Replacement needs for worn clip-in coolant temp sensors

Installation Notes and Tips

Verify connector style, terminal count, and sensor mounting style before installation. This sensor uses a female oval connector, 2 terminals, and a no-threads/clip-in fitment, so it should be matched to the original sensor design on the vehicle. Confirm application details for your specific Ford, Lincoln, Mazda, or Mercury model, especially on vehicles with notes such as clip-in sensor port, push-in type, or thermostat housing placement.

Common fitment examples include Fits 2013-2019 Ford Escape, N/A; Fits 2012-2019 Ford Explorer, N/A; Fits 2013-2017 Lincoln MKZ, N/A; Fits 2004-2011 Ford Ranger, N/A; and Fits 2001-2008 Mazda B2300, N/A.

Quality Assurance

Four Seasons lists this coolant temperature sensor as meeting or exceeding OEM requirements, supporting OE-level replacement expectations for the listed applications.

Related reading

This part fits 229 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodel# DoorsLitersCylindersFuel TypePositionNotes
2019FordEdge——2.0LL4—N/A2 Blade Term
2019FordEscape——2.0LL4—N/A—
2019FordExplorer——2.3LL4—N/A—
2019FordFiesta——1.6LL4—N/A—
2019FordFusion——2.0LL4GASN/A—
2019FordTaurus——3.5LV6GASN/A—
2019LincolnContinental——2.7LV6GASN/A—
2019LincolnMKC—————N/A—
2019LincolnNautilus——2.0LL4—N/A—
2018FordC-Max——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2018FordEdge——2.0LL4—N/A—
2018FordEscape——2.0LL4—N/A—
2018FordExplorer——2.3LL4—N/A—
2018FordFiesta——1.6LL4—N/A—
2018FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2018FordFusion——2.0LL4GASN/A—
2018FordTaurus—————N/ALocated On Radiator
2018LincolnContinental—————N/ALocated On Radiator
2018LincolnMKC—————N/A—
2017FordC-Max——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2017FordEdge——2.0LL4—N/A—
2017FordEscape——2.0LL4—N/A—
2017FordExplorer——2.3LL4—N/A—
2017FordFiesta——1.6LL4—N/A—
2017FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2017FordFusion——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2017FordTaurus——2.0LL4—N/A—
2017LincolnContinental—————N/A—
2017LincolnMKC—————N/A—
2017LincolnMKZ——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2016FordC-Max——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2016FordEdge——2.0LL4—N/A—
2016FordEscape——2.0LL4—N/A—
2016FordExplorer——2.3LL4—N/A—
2016FordFiesta——1.6LL4—N/A—
2016FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2016FordFusion——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2016FordTaurus——2.0LL4—N/A—
2016LincolnMKC—————N/A—
2016LincolnMKT——2.0LL4—N/A—
2016LincolnMKZ——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2015FordC-Max——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2015FordEdge——2.0LL4—N/A—
2015FordEscape——2.0LL4—N/A—
2015FordExplorer——2.0LL4—N/A—
2015FordFiesta——1.6LL4—N/A—
2015FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2015FordFusion——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2015FordTaurus——2.0LL4—N/A—
2015LincolnMKC—————N/A—
2015LincolnMKT——2.0LL4—N/A—
2015LincolnMKZ——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2014FordC-Max——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2014FordEcoSport—————N/ACoolant Temp Sensor
2014FordEdge——2.0LL4—N/A—
2014FordEscape——2.0LL4—N/A—
2014FordExplorer——2.0LL4—N/A—
2014FordFiesta——1.6LL4—N/A—
2014FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2014FordFusion——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2014FordTaurus——2.0LL4—N/A—
2014LincolnMKT——2.0LL4—N/A—
2014LincolnMKZ——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2013FordC-Max——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2013FordEcoSport—————N/ACoolant Temp Sensor
2013FordEdge——2.0LL4—N/A—
2013FordEscape——2.0LL4—N/A—
2013FordExplorer——2.0LL4—N/A—
2013FordFiesta—————N/A—
2013FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2013FordFusion——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2013FordTaurus——2.0LL4—N/A—
2013LincolnMKT——2.0LL4—N/A—
2013LincolnMKZ——2.0LL4ELECTRIC/GASN/ACoolant Temp Sensor
2012FordEcoSport—————N/ACoolant Temp Sensor
2012FordEdge——2.0LL4—N/A—
2012FordExplorer——2.0LL4—N/A—
2012FordFiesta—————N/A—
2012FordFocus——2.0LL4—N/AIn Thermostat Housing; New Part; Coolant Temp Sensor
2011FordEcoSport—————N/ACoolant Temp Sensor
2011FordFiesta—————N/A—
2011FordRanger——4.0LV6—N/ACoolant Temp Sensor
2010FordEcoSport—————N/ACoolant Temp Sensor
2010FordExplorer——4.0LV6—N/ACoolant Temp Sensor
2010FordExplorer Sport Trac—————N/ACoolant Temp Sensor
2010FordMustang——4.0LV6—N/ACoolant Temp Sensor
2010FordRanger——4.0LV6—N/ACoolant Temp Sensor
2010MazdaB4000—————N/ACoolant Temp Sensor
2010MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2009FordEcoSport—————N/ACoolant Temp Sensor
2009FordExplorer——4.0LV6—N/ACoolant Temp Sensor
2009FordExplorer Sport Trac—————N/ACoolant Temp Sensor
2009FordFusion——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2009FordMustang——4.0LV6—N/ACoolant Temp Sensor
2009FordRanger——4.0LV6—N/ACoolant Temp Sensor
2009MazdaB4000—————N/ACoolant Temp Sensor
2009MercuryMilan——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2009MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2008FordEcoSport—————N/ACoolant Temp Sensor
2008FordExplorer——4.0LV6—N/ACoolant Temp Sensor
2008FordExplorer Sport Trac—————N/ACoolant Temp Sensor
2008FordFusion——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2008FordMustang——4.0LV6—N/ACoolant Temp Sensor
2008FordRanger——4.0LV6—N/ACoolant Temp Sensor
2008MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2008MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2008MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2008MercuryMariner——2.3LL4—N/AClip-In Sensor Style; New Part; Coolant Temp Sensor
2008MercuryMilan——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2008MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2007FordCourier—————N/ACoolant Temp Sensor
2007FordEcoSport—————N/ACoolant Temp Sensor
2007FordExplorer——4.0LV6—N/ACoolant Temp Sensor
2007FordExplorer Sport Trac——4.0LV6—N/ACoolant Temp Sensor
2007FordFiesta—————N/ACoolant Temp Sensor
2007FordFive Hundred—————N/ACoolant Temp Sensor
2007FordFreestyle—————N/ACoolant Temp Sensor
2007FordFusion——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2007FordMustang——4.0LV6—N/ACoolant Temp Sensor
2007FordRanger——4.0LV6—N/ACoolant Temp Sensor
2007MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2007MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2007MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2007MercuryMilan——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2007MercuryMontego—————N/ACoolant Temp Sensor
2007MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2006FordCourier—————N/ACoolant Temp Sensor
2006FordEcoSport—————N/ACoolant Temp Sensor
2006FordExplorer——4.0LV6—N/ACoolant Temp Sensor
2006FordFiesta—————N/ACoolant Temp Sensor
2006FordFive Hundred—————N/ACoolant Temp Sensor
2006FordFreestyle—————N/ACoolant Temp Sensor
2006FordFusion——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2006FordMustang——4.0LV6—N/ACoolant Temp Sensor
2006FordRanger——4.0LV6—N/ACoolant Temp Sensor
2006MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2006MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2006MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2006MercuryMilan——2.3LL4—N/APush-In Type; New Part; Coolant Temp Sensor
2006MercuryMontego—————N/ACoolant Temp Sensor
2006MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2005FordCourier—————N/ACoolant Temp Sensor
2005FordEcoSport—————N/ACoolant Temp Sensor
2005FordExplorer——4.0LV6—N/ACoolant Temp Sensor
2005FordExplorer Sport Trac—————N/ACoolant Temp Sensor
2005FordFiesta—————N/ACoolant Temp Sensor
2005FordFive Hundred—————N/ACoolant Temp Sensor
2005FordFreestyle—————N/ACoolant Temp Sensor
2005FordMustang——4.0LV6—N/ACoolant Temp Sensor
2005FordRanger——4.0LV6—N/ACoolant Temp Sensor
2005MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2005MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2005MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2005MercuryMontego—————N/ACoolant Temp Sensor
2005MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2004FordCourier—————N/ACoolant Temp Sensor
2004FordEcoSport—————N/ACoolant Temp Sensor
2004FordEscape——3.0LV6—N/ACoolant Temp Sensor
2004FordExplorer—————N/ACoolant Temp Sensor
2004FordExplorer Sport Trac—————N/ACoolant Temp Sensor
2004FordFiesta—————N/ACoolant Temp Sensor
2004FordFocus——2.0LL4—N/ACoolant Temp Sensor
2004FordFocus——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2004FordRanger——4.0LV6—N/ACoolant Temp Sensor
2004FordRanger——2.3LL4—N/APush-In Type; Coolant Temp Sensor
2004MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2004MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2004MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2004MazdaTribute——3.0LV6—N/ACoolant Temp Sensor
2004MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2003FordCourier—————N/ACoolant Temp Sensor
2003FordEscape——3.0LV6—N/ACoolant Temp Sensor
2003FordEscort—————N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2003FordExplorer—————N/AGray; 2 Term.; Coolant Temp Sensor
2003FordExplorer Sport—————N/AGray; 2 Term.; Coolant Temp Sensor
2003FordExplorer Sport Trac—————N/AGray; 2 Term.; Coolant Temp Sensor
2003FordFiesta—————N/ACoolant Temp Sensor
2003FordFocus—————N/ACoolant Temp Sensor
2003FordRanger—————N/AGray; 2 Term.; Coolant Temp Sensor
2003MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2003MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2003MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2003MazdaTribute——3.0LV6—N/ACoolant Temp Sensor
2003MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2002FordCourier—————N/ACoolant Temp Sensor
2002FordEscape——3.0LV6—N/ACoolant Temp Sensor
2002FordEscort—2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2002FordEscortZX22 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2002FordExplorer—————N/AGray; 2 Term.; Coolant Temp Sensor
2002FordExplorer Sport—————N/AGray; 2 Term.; Coolant Temp Sensor
2002FordExplorer Sport Trac—————N/AGray; 2 Term.; Coolant Temp Sensor
2002FordFocus—————N/ACoolant Temp Sensor
2002FordRanger—————N/AGray; 2 Term.; Coolant Temp Sensor
2002MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2002MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2002MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2002MazdaTribute——3.0LV6—N/ACoolant Temp Sensor
2002MercuryMountaineer——4.0LV6—N/ACoolant Temp Sensor
2001FordCourier—————N/ACoolant Temp Sensor
2001FordEscape——3.0LV6—N/ACoolant Temp Sensor
2001FordEscort—2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2001FordEscortZX22 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2001FordExplorer—————N/AGray; 2 Term.; Coolant Temp Sensor
2001FordExplorer Sport—————N/AGray; 2 Term.; Coolant Temp Sensor
2001FordExplorer Sport Trac—————N/AGray; 2 Term.; Coolant Temp Sensor
2001FordF-100 Ranger—————N/ARectangular connector
2001FordFiesta——1.6LL4—N/ACoolant Temp Sensor
2001FordFocus—————N/Aw/ Clip in Sensor Port; Coolant Temp Sensor
2001FordRanger——4.0LV6—N/AGray; Rectangular connector; Coolant Temp Sensor
2001MazdaB2300—————N/AGray; 2 Term.; Coolant Temp Sensor
2001MazdaB2500—————N/AGray; 2 Term.; Coolant Temp Sensor
2001MazdaB3000—————N/AGray; 2 Term.; Coolant Temp Sensor
2001MazdaB4000—————N/AGray; 2 Term.; Coolant Temp Sensor
2001MazdaTribute——3.0LV6—N/ACoolant Temp Sensor
2000FordContour——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2000FordEscort—2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2000FordEscortZX22 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2000FordEscortZX2 S/R2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
2000FordFocus—————N/APush-In Type; New Part; Coolant Temp Sensor
2000FordFocus—————N/Aw/ Clip in Sensor Port; Coolant Temp Sensor
2000MercuryMystique——2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
1999FordContour——2.0LL4—N/Aw/ Clip in Sensor Port; New Part; Coolant Temp Sensor
1999FordEscortZX2 Cool Coupe2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
1999FordEscortZX2 Hot Coupe2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
1999FordEscortZX2 S/R2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
1999FordEscortZX2 Equi2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
1999FordEscortZX2 Tipico2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
1999MercuryMystique——2.0LL4—N/AClip Mount; New Part; Coolant Temp Sensor
1998FordEscort—2 Door2.0LL4—N/AEngine Cooling Fan Motor Relay - New Part; Coolant Temp Sensor
Directly replaces or cross-references 17 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 378591F22188401F60188401F6018840A1L2Z12A648AA3L8Z12A648A3L8Z12A648BA7C1Z12A648A1712464A14209AJ0318840AJ0318840AIL2Z12A648AASU2301SU2370SU9719XS6Z12A648CA