Merry Christmas Sale 15% OFF Code:
XMAS15
24/7 Customer service
USD
Add your vehicle
Address
Login
Cart
Item
$0.00
A-Premium Merry Christmas Sale 15% OFFA-Premium Merry Christmas Sale 15% OFF
Shopping for Scion
ADD VEHICLE DETAILS

Thermostat

13items
  • All filters
  • Sort By
  • Price
  • Brand
  • Material
  • Color
  • Warranty
Engine Coolant Thermostat for Toyota Camry RAV4 Ford Mitsubishi Scion Lexus 89℃Engine Coolant Thermostat for Toyota Camry RAV4 Ford Mitsubishi Scion Lexus 89℃
A-Premium®Part # APTHE071
Engine Coolant Thermostat for Toyota Camry RAV4 Ford Mitsubishi Scion Lexus 89℃
4.649 Reviews
$26.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 1998 - 2002 Chevrolet Prizm, 1992 - 1992 Dodge Colt, 1992 - 1992 Dodge Colt, 1993 - 1996 Eagle Summit, 1995 - 1998 Eagle Talon, 1996 - 1999 Ford Taurus, 1990 - 1991 Lexus ES250, 1992 - 2003 Lexus ES300, 2004 - 2006 Lexus ES330, 2007 - 2017 Lexus ES350, 2010 - 2012 Lexus HS250h, 1990 - 1997 Lexus LS400, 1999 - 2003 Lexus RX300, 2004 - 2006 Lexus RX330, 2007 - 2015 Lexus RX350, 2006 - 2008 Lexus RX400h, 2010 - 2015 Lexus RX450h, 1992 - 1997 Lexus SC400, 1995 - 1996 Mitsubishi Eclipse, 1999 - 1999 Mitsubishi Eclipse, 1996 - 1998 Mitsubishi Eclipse, 2006 - 2011 Mitsubishi Eclipse, 1993 - 1995 Mitsubishi Expo, 1993 - 1994 Mitsubishi Expo LRV, 1993 - 1993 Mitsubishi Galant, 1994 - 1998 Mitsubishi Galant, 2004 - 2011 Mitsubishi Galant, 2004 - 2005 Mitsubishi Lancer, 1994 - 1994 Mitsubishi Mighty Max, 2004 - 2006 Mitsubishi Outlander, 2003 - 2010 Pontiac Vibe, 2009 - 2010 Pontiac Vibe, 2005 - 2010 Scion tC, 2011 - 2016 Scion tC, 2008 - 2015 Scion xB, 2008 - 2014 Scion xD, 1996 - 2002 Toyota 4Runner, 1995 - 2004 Toyota Avalon, 2005 - 2017 Toyota Avalon, 2002 - 2011 Toyota Camry, 2010 - 2011 Toyota Camry, 2012 - 2017 Toyota Camry, 1988 - 1991 Toyota Camry, 1992 - 2006 Toyota Camry, 2004 - 2006 Toyota Camry, 2007 - 2017 Toyota Camry, 2000 - 2005 Toyota Celica, 1990 - 1993 Toyota Celica, 1990 - 1991 Toyota Celica, 2000 - 2013 Toyota Corolla, 2009 - 2012 Toyota Corolla, 2001 - 2007 Toyota Highlander, 2017 - 2017 Toyota Highlander, 2009 - 2016 Toyota Highlander, 2001 - 2003 Toyota Highlander, 2004 - 2010 Toyota Highlander, 2008 - 2016 Toyota Highlander, 2003 - 2014 Toyota Matrix, 2009 - 2013 Toyota Matrix, 1991 - 1995 Toyota MR2, 1991 - 1995 Toyota MR2, 2000 - 2005 Toyota MR2 Spyder, 2001 - 2003 Toyota RAV4, 2004 - 2008 Toyota RAV4, 2009 - 2015 Toyota RAV4, 2016 - 2017 Toyota RAV4, 2006 - 2012 Toyota RAV4, 2012 - 2012 Toyota RAV4, 2011 - 2013 Toyota Sienna, 1998 - 2003 Toyota Sienna, 2004 - 2006 Toyota Sienna, 2007 - 2016 Toyota Sienna, 2002 - 2008 Toyota Solara, 1999 - 2003 Toyota Solara, 2004 - 2008 Toyota Solara, 1995 - 1998 Toyota T100, 1995 - 2004 Toyota Tacoma, 2000 - 2004 Toyota Tundra, 2009 - 2016 Toyota Venza, 2009 - 2016 Toyota Venza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DUS4
Show less
A-Premium APTHE006 Engine Coolant Thermostat
A-Premium®Part # APTHE006
A-Premium APTHE006 Engine Coolant Thermostat
4.649 Reviews
$19.99
Quantity Less than 4
Edit ZIP code
2-year warranty
90 days free return
Fits 1998 - 2002 Chevrolet Prizm, 1992 - 1992 Dodge Colt, 1993 - 1996 Eagle Summit, 1995 - 1998 Eagle Talon, 1996 - 1999 Ford Taurus, 1990 - 1991 Lexus ES250, 1992 - 2003 Lexus ES300, 2004 - 2006 Lexus ES330, 2007 - 2018 Lexus ES350, 2010 - 2012 Lexus HS250h, 1990 - 1997 Lexus LS400, 1999 - 2003 Lexus RX300, 2004 - 2006 Lexus RX330, 2007 - 2015 Lexus RX350, 2006 - 2008 Lexus RX400h, 2010 - 2015 Lexus RX450h, 1992 - 1997 Lexus SC400, 1995 - 1996 Mitsubishi Eclipse, 1996 - 1998 Mitsubishi Eclipse, 1999 - 1999 Mitsubishi Eclipse, 2006 - 2011 Mitsubishi Eclipse, 1993 - 1995 Mitsubishi Expo, 1993 - 1994 Mitsubishi Expo LRV, 1993 - 1993 Mitsubishi Galant, 1994 - 1998 Mitsubishi Galant, 2004 - 2011 Mitsubishi Galant, 2004 - 2005 Mitsubishi Lancer, 1994 - 1994 Mitsubishi Mighty Max, 2004 - 2006 Mitsubishi Outlander, 2003 - 2010 Pontiac Vibe, 2009 - 2010 Pontiac Vibe, 2005 - 2010 Scion tC, 2011 - 2016 Scion tC, 2008 - 2015 Scion xB, 2008 - 2013 Scion xD, 1996 - 2002 Toyota 4Runner, 1995 - 2004 Toyota Avalon, 2005 - 2018 Toyota Avalon, 2002 - 2011 Toyota Camry, 2010 - 2011 Toyota Camry, 2012 - 2017 Toyota Camry, 1988 - 1991 Toyota Camry, 1992 - 2006 Toyota Camry, 2004 - 2006 Toyota Camry, 2007 - 2017 Toyota Camry, 2000 - 2005 Toyota Celica, 1990 - 1993 Toyota Celica, 1990 - 1991 Toyota Celica, 1998 - 1999 Toyota Corolla, 2000 - 2013 Toyota Corolla, 2014 - 2016 Toyota Corolla, 2014 - 2017 Toyota Corolla, 2014 - 2018 Toyota Corolla, 2014 - 2019 Toyota Corolla, 2016 - 2016 Toyota Corolla, 2017 - 2017 Toyota Corolla, 2017 - 2018 Toyota Corolla, 2017 - 2019 Toyota Corolla, 2009 - 2012 Toyota Corolla, 2001 - 2007 Toyota Highlander, 2009 - 2014 Toyota Highlander, 2016 - 2016 Toyota Highlander, 2017 - 2017 Toyota Highlander, 2018 - 2019 Toyota Highlander, 2001 - 2003 Toyota Highlander, 2004 - 2010 Toyota Highlander, 2008 - 2016 Toyota Highlander, 2003 - 2014 Toyota Matrix, 2009 - 2013 Toyota Matrix, 1991 - 1995 Toyota MR2, 2000 - 2005 Toyota MR2 Spyder, 2012 - 2012 Toyota RAV4, 2001 - 2003 Toyota RAV4, 2004 - 2008 Toyota RAV4, 2009 - 2018 Toyota RAV4, 2006 - 2012 Toyota RAV4, 2011 - 2012 Toyota Sienna, 1998 - 2003 Toyota Sienna, 2004 - 2006 Toyota Sienna, 2007 - 2016 Toyota Sienna, 2020 - 2020 Toyota Sienna, 2002 - 2008 Toyota Solara, 1999 - 2003 Toyota Solara, 1995 - 1998 Toyota T100, 1995 - 2004 Toyota Tacoma, 2000 - 2004 Toyota Tundra, 2009 - 2016 Toyota Venza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
MaterialMetal
ConditionNew
item #10156A30
Show less
Engine Coolant Thermostat for Toyota Prius Tacoma 4Runner Yaris Mitsubishi 82℃
A-Premium®Part # APTHE041
Engine Coolant Thermostat for Toyota Prius Tacoma 4Runner Yaris Mitsubishi 82℃
4.649 Reviews
$26.99
Edit ZIP code
2-year warranty
90 days free return
Fits 1993 - 2005 Lexus GS300, 2001 - 2005 Lexus IS300, 1992 - 2000 Lexus SC300, 2009 - 2010 Mitsubishi Lancer, 2011 - 2015 Mitsubishi Lancer, 2008 - 2010 Mitsubishi Outlander, 2004 - 2006 Scion xA, 2004 - 2006 Scion xB, 1996 - 2000 Toyota 4Runner, 2010 - 2010 Toyota 4Runner, 2000 - 2005 Toyota Echo, 1991 - 1997 Toyota Previa, 2001 - 2009 Toyota Prius, 1993 - 1998 Toyota Supra, 1994 - 1998 Toyota T100, 1995 - 2004 Toyota Tacoma, 1995 - 2015 Toyota Tacoma, 2006 - 2018 Toyota Yaris
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DWS9
Show less
ÜRO Parts TY0715781PRM Engine Coolant Thermostat Housing
ÜRO PartsPart # TY0715781PRM
ÜRO Parts TY0715781PRM Engine Coolant Thermostat Housing
4.410 Reviews
$31.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2010-2012 Lexus HS250h, 2011-2015 Scion xB, 2001-2007 Toyota Highlander, 2002-2008 Toyota Solara, 2002-2011 Toyota Camry, 2006-2008 Toyota RAV4, 2009-2013 Toyota Corolla, 2009-2013 Toyota Matrix
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
MaterialAluminum
ColorBlack
Part interchange
TY0715781PRM, 16321-0H011, 16321-0H010, 16321-28020, 902-5124, 85352, CO34921, CH-2124, 
...View more
item #1000ZRWL
Show less
Engine Coolant Thermostat for Subaru Outback 13-19 Forester Mitsubishi Scion 87℃
A-Premium®Part # APTHE067
Engine Coolant Thermostat for Subaru Outback 13-19 Forester Mitsubishi Scion 87℃
4.649 Reviews
$23.99
Quantity Less than 4
Edit ZIP code
2-year warranty
90 days free return
Fits 2011 - 2015 Mitsubishi Lancer, 2011 - 2016 Mitsubishi Lancer, 2016 - 2016 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2017 - 2017 Mitsubishi Lancer, 2011 - 2020 Mitsubishi Outlander, 2018 - 2018 Mitsubishi Outlander, 2022 - 2022 Mitsubishi Outlander, 2018 - 2021 Mitsubishi Outlander PHEV, 2022 - 2023 Mitsubishi Outlander PHEV, 2011 - 2016 Mitsubishi Outlander Sport, 2015 - 2016 Mitsubishi Outlander Sport, 2017 - 2017 Mitsubishi Outlander, 2017 - 2017 Mitsubishi Outlander, 2017 - 2017 Mitsubishi Outlander, 2017 - 2017 Mitsubishi Outlander, 2017 - 2017 Mitsubishi Outlander, 2018 - 2020 Mitsubishi Outlander Sport, 2018 - 2023 Mitsubishi Outlander Sport, 2011 - 2013 Mitsubishi RVR, 2014 - 2015 Mitsubishi RVR, 2014 - 2016 Mitsubishi RVR, 2014 - 2017 Mitsubishi RVR, 2015 - 2015 Mitsubishi RVR, 2015 - 2017 Mitsubishi RVR, 2017 - 2017 Mitsubishi RVR, 2013 - 2016 Scion FR-S, 2013 - 2020 Subaru BRZ, 2016 - 2020 Subaru Crosstrek, 2021 - 2021 Subaru Crosstrek, 2011 - 2023 Subaru Forester, 2012 - 2014 Subaru Impreza, 2015 - 2021 Subaru Impreza, 2022 - 2023 Subaru Impreza, 2013 - 2019 Subaru Legacy, 2013 - 2019 Subaru Outback, 2017 - 2017 Subaru Outback, 2017 - 2017 Subaru Outback, 2018 - 2018 Subaru Outback, 2013 - 2015 Subaru XV Crosstrek, 2017 - 2019 Toyota 86
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DV7W
Show less
Beck/Arnley 143-0912 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0912
Beck/Arnley 143-0912 Engine Coolant Thermostat
51 Reviews
$29.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2013-2016 Scion FR-S, 2011-2011 Subaru Forester, 2011-2013 Subaru Forester, 2011-2013 Subaru Forester, 2011-2013 Subaru Forester, 2012-2013 Subaru Forester, 2013-2013 Subaru Forester, 2013-2015 Subaru BRZ, 2014-2018 Subaru Forester, 2017-2020 Toyota 86
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
Part interchange
143-0912
item #1000XLDD
Show less
Beck/Arnley 143-0722 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0722
Beck/Arnley 143-0722 Engine Coolant Thermostat
51 Reviews
$31.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1998-2000 Chevrolet Prizm, 1995-1998 Eagle Talon, 1999-2005 Hyundai Sonata, 2001-2004 Hyundai Santa Fe, 2003-2006 Kia Optima, 1990-1991 Lexus ES250, 1990-1996 Lexus LS400, 1992-1995 Lexus ES300, 1992-1997 Lexus SC400, 1999-2002 Lexus ES300, 1999-2002 Lexus RX300, 2004-2004 Lexus ES330, 2007-2015 Lexus RX350, 2007-2018 Lexus ES350, 2010-2015 Lexus RX450h, 1993-1994 Mitsubishi Expo LRV, 1993-1995 Mitsubishi Expo, 1993-1998 Mitsubishi Galant, 1995-1999 Mitsubishi Eclipse, 1995-1999 Mitsubishi Eclipse, 1996-1999 Mitsubishi Eclipse, 2004-2004 Mitsubishi Galant, 2004-2004 Mitsubishi Galant, 2004-2004 Mitsubishi Lancer, 2004-2004 Mitsubishi Lancer, 2004-2006 Mitsubishi Outlander, 2005-2005 Mitsubishi Lancer, 2005-2009 Mitsubishi Galant, 2006-2006 Mitsubishi Lancer, 2006-2011 Mitsubishi Eclipse, 2010-2011 Mitsubishi Galant, 2005-2005 Scion tC, 2006-2010 Scion tC, 2008-2011 Scion xB, 1989-1991 Toyota Camry, 1990-1991 Toyota Celica, 1990-1993 Toyota Celica, 1991-1995 Toyota MR2, 1992-1993 Toyota Camry, 1995-1998 Toyota T100, 1995-2004 Toyota Tacoma, 1996-2000 Toyota 4Runner, 2000-2000 Toyota MR2 Spyder, 2000-2004 Toyota Tundra, 2001-2002 Toyota 4Runner, 2001-2008 Toyota Corolla, 2003-2003 Toyota Matrix, 2004-2005 Toyota Solara, 2005-2012 Toyota Avalon, 2006-2008 Toyota RAV4, 2007-2010 Toyota Sienna, 2007-2017 Toyota Camry, 2008-2016 Toyota Highlander, 2009-2012 Toyota RAV4, 2009-2013 Toyota Corolla, 2009-2013 Toyota Matrix, 2009-2015 Toyota Venza, 2011-2013 Toyota Sienna, 2013-2018 Toyota Avalon, 2014-2016 Toyota Sienna, 2014-2017 Toyota Corolla
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0722
item #1000XEUU
Show less
Beck/Arnley 143-0714 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0714
Beck/Arnley 143-0714 Engine Coolant Thermostat
51 Reviews
$27.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1992-2000 Lexus SC300, 1993-2005 Lexus GS300, 2001-2005 Lexus IS300, 2004-2006 Scion xA, 2004-2006 Scion xB, 1993-1998 Toyota Supra, 2005-2016 Toyota Tacoma, 2010-2010 Toyota 4Runner
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
Part interchange
143-0714
item #1000XD8Z
Show less
Beck/Arnley 143-0793 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0793
Beck/Arnley 143-0793 Engine Coolant Thermostat
51 Reviews
$37.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1998-2000 Chevrolet Prizm, 1996-1998 Lexus ES300, 2004-2006 Lexus RX330, 2005-2006 Lexus ES330, 2006-2007 Lexus RX400h, 2009-2009 Scion xD, 1994-2001 Toyota Camry, 1995-2004 Toyota Avalon, 1998-2000 Toyota Corolla, 1998-2006 Toyota Sienna, 1999-2001 Toyota Solara, 2000-2000 Toyota MR2 Spyder, 2000-2005 Toyota Celica, 2001-2003 Toyota Highlander, 2001-2005 Toyota MR2 Spyder, 2001-2005 Toyota RAV4, 2002-2003 Toyota Camry, 2002-2003 Toyota Solara, 2003-2008 Toyota Matrix, 2004-2006 Toyota Camry, 2004-2006 Toyota Camry, 2004-2007 Toyota Highlander, 2004-2008 Toyota Solara, 2008-2010 Toyota Highlander, 2009-2009 Toyota Matrix
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0793
item #1000XG2V
Show less
Engine Coolant Thermostat for Subaru Outback 13-19 Forester Impreza Toyota 89℃
A-Premium®Part # APTHE068
Engine Coolant Thermostat for Subaru Outback 13-19 Forester Impreza Toyota 89℃
4.649 Reviews
$20.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2011 - 2015 Mitsubishi Lancer, 2011 - 2015 Mitsubishi Lancer, 2016 - 2017 Mitsubishi Lancer, 2011 - 2020 Mitsubishi Outlander, 2018 - 2018 Mitsubishi Outlander, 2018 - 2020 Mitsubishi Outlander PHEV, 2011 - 2021 Mitsubishi Outlander Sport, 2015 - 2020 Mitsubishi Outlander Sport, 2011 - 2017 Mitsubishi RVR, 2013 - 2013 Scion FR-S, 2014 - 2016 Scion FR-S, 2013 - 2020 Subaru BRZ, 2016 - 2021 Subaru Crosstrek, 2011 - 2023 Subaru Forester, 2012 - 2014 Subaru Impreza, 2015 - 2021 Subaru Impreza, 2022 - 2023 Subaru Impreza, 2013 - 2014 Subaru Legacy, 2015 - 2019 Subaru Legacy, 2013 - 2014 Subaru Outback, 2015 - 2019 Subaru Outback, 2017 - 2017 Subaru Outback, 2018 - 2018 Subaru Outback, 2013 - 2015 Subaru XV Crosstrek, 2017 - 2020 Toyota 86, 2022 - 2024 Toyota GR86
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DVR7
Show less
Thermostat Housing Assembly for Toyota Corolla 2009-2022 Matrix C-HR Scion xD iM
A-Premium®Part # APTHA0174
Thermostat Housing Assembly for Toyota Corolla 2009-2022 Matrix C-HR Scion xD iM
4.649 Reviews
$17.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2010 - 2019 Toyota Corolla, 2020 - 2022 Toyota Corolla, 2009 - 2009 Toyota Corolla, 2009 - 2014 Toyota Matrix, 2018 - 2022 Toyota C-HR, 2016 - 2016 Scion iM, 2008 - 2014 Scion xD, 2017 - 2018 Toyota Corolla iM
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
MaterialPlastic
ColorBlack
Part interchange
902-5927, 9025927, 902 5927, CH2927, 85356, 163210T030, 1632137010
ConditionNew
item #10183WH5
Show less
Engine Coolant Thermostat for Toyota RAV4 Corolla C-HR Scion iM Lexus NX300h 80℃
A-Premium®Part # APTHE013
Engine Coolant Thermostat for Toyota RAV4 Corolla C-HR Scion iM Lexus NX300h 80℃
4.649 Reviews
$26.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2015 - 2021 Lexus NX300h, 2016 - 2016 Scion iM, 2018 - 2022 Toyota C-HR, 2014 - 2014 Toyota Corolla, 2014 - 2019 Toyota Corolla, 2020 - 2022 Toyota Corolla, 2017 - 2018 Toyota Corolla iM, 2016 - 2018 Toyota RAV4
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DXQ6
Show less
Beck/Arnley 143-0927 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0927
Beck/Arnley 143-0927 Engine Coolant Thermostat
51 Reviews
$37.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2010-2012 Lexus HS250h, 2009-2009 Scion xD, 2010-2014 Scion xD, 2011-2016 Scion tC, 2012-2015 Scion xB, 2004-2006 Toyota Camry, 2004-2007 Toyota Highlander, 2004-2008 Toyota Solara, 2007-2008 Toyota Camry, 2009-2010 Toyota Corolla, 2009-2011 Toyota Camry, 2009-2012 Toyota RAV4, 2009-2015 Toyota Venza, 2009-2019 Toyota Highlander, 2010-2017 Toyota Camry, 2011-2012 Toyota Sienna, 2013-2014 Toyota RAV4, 2015-2018 Toyota Corolla, 2015-2018 Toyota RAV4, 2015-2018 Toyota RAV4, 2015-2018 Toyota RAV4, 2016-2018 Toyota RAV4, 2017-2018 Toyota RAV4, 2018-2018 Toyota RAV4, 2019-2019 Toyota Corolla
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Scion
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0927
item #1000XGQS
Show less

What is an engine thermostat?

 While all engines can become too hot, if your thermostat isn't working correctly, your engine's well-being is at serious risk. The engine thermostat, often simply referred to as a thermostat, regulates the engine's operating temperature within an optimal range (typically around 195 to 220 degrees Fahrenheit).

How does a car thermostat work?

As a temperature-sensitive valve within the cooling system, a car thermostat responds to changes in coolant temperature. Understanding how it works by the following breakdown steps:

  • Closed position (cold start)

Initially closed to help the engine warm up quickly.

  • Heating up

The engine generates heat during operation.

  • Opening the thermostat

A temperature-sensitive element (usually wax) causes the thermostat to open gradually.

  • Coolant flow

When open, coolant flows from the engine to the radiator.

  • Maintaining optimal temperature

Adjusts coolant flow to maintain the ideal engine temperature.

  • Temperature regulation

Continuously adjusts to prevent overheating and ensure efficient operation.

Signs of a bad thermostat

  1. Overheating: The engine becomes excessively hot due to a stuck-closed thermostat.
  2. Low or fluctuating temperature: A thermostat stuck open results in a cooler engine, affecting fuel efficiency and heating.
  3. Temperature warning light: Illuminates to indicate engine overheating due to a faulty thermostat.
  4. Poor fuel efficiency: Stuck-open thermostat reduces fuel efficiency as the engine operates less efficiently at lower temperatures.
  5. Inadequate cabin heating: Insufficient cabin heating in cold weather with a thermostat that's stuck open.
  6. Coolant leaks: Gasket or sealing issues can lead to coolant leaks.
  7. Rapid temperature fluctuations: The gauge shows rapid swings between hot and cold.
  8. Engine running hot at idle: Higher engine temperature during idle or in traffic due to restricted coolant flow.
  9. Slow or inconsistent warm-up: Longer-than-normal warm-up times, even in moderate weather.
  10. Inconsistent heater operation: This affects the performance of the vehicle's heater, causing inconsistent or inadequate heating in cold weather.