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Subaru Thermostat

6 items

Upgrade your vehicle's thermostat with A-Premium's high-quality options. Choose reliability and durability for a smoother ride.

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Engine Coolant Thermostat for Subaru Outback Forester Impreza WRX Saab 9-2X 78℃Engine Coolant Thermostat for Subaru Outback Forester Impreza WRX Saab 9-2X 78℃
A-Premium®Part # APTHE051
Engine Coolant Thermostat for Subaru Outback Forester Impreza WRX Saab 9-2X 78℃
52 Reviews
CA$42.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2020 - 2021 Subaru WRX STI, 2015 - 2019 Subaru Legacy, 2015 - 2019 Subaru Outback, 2013 - 2018 Subaru WRX STI, 2013 - 2016 Subaru WRX, 2011 - 2013 Subaru Forester, 2005 - 2006 Saab 9-2X, 2005 - 2005 Saab 9-2X, 2003 - 2006 Subaru Baja, 2002 - 2005 Subaru Impreza, 2001 - 2004 Subaru Outback, 2000 - 2009 Subaru Outback, 1998 - 2014 Subaru Impreza, 1998 - 2010 Subaru Forester, 1996 - 2009 Subaru Legacy, 1995 - 2001 Subaru Impreza, 1993 - 1997 Subaru Impreza, 1992 - 1997 Subaru SVX, 1990 - 1999 Subaru Legacy
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Subaru
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DYPS
Note
【Note-1】 Start to Open Temperature: 78℃.;
【Note-2】 2011-2013 Subaru Forester it fits Turbocharged only, NOT fit Naturally Aspirated.
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Engine Coolant Thermostat for Subaru Outback 00-15 Forester Impreza Legacy 82℃
A-Premium®Part # APTHE076
Engine Coolant Thermostat for Subaru Outback 00-15 Forester Impreza Legacy 82℃
52 Reviews
CA$42.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2014 - 2016 Subaru Forester, 2011 - 2013 Subaru Forester, 2010 - 2015 Subaru Legacy, 2010 - 2015 Subaru Outback, 2008 - 2014 Subaru Tribeca, 2008 - 2009 Subaru Legacy, 2006 - 2009 Subaru Outback, 2006 - 2007 Subaru B9 Tribeca, 2005 - 2009 Subaru Legacy, 2005 - 2006 Saab 9-2X, 2004 - 2011 Subaru Impreza, 2004 - 2010 Subaru Forester, 2003 - 2006 Subaru Baja, 2002 - 2005 Subaru Impreza, 2001 - 2005 Subaru Outback, 2000 - 2009 Subaru Outback, 1998 - 2003 Subaru Impreza, 1996 - 2004 Subaru Legacy, 1995 - 2001 Subaru Impreza, 1995 - 1999 Subaru Legacy
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Subaru
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DYCR
Note
【Note-1】 Start to Open Temperature: 82℃.;
【Note-2】 2014-2016 Subaru Forester H4 2.5L with Manual Transmission or Automatic CVT Transmission.;
【Note-3】 2005 Subaru Outback H6 3.0L with model built before 05/2005.
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Engine Coolant Thermostat for Subaru Outback Forester Impreza Legacy Tribeca 77℃
A-Premium®Part # APTHE074
Engine Coolant Thermostat for Subaru Outback Forester Impreza Legacy Tribeca 77℃
52 Reviews
CA$23.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2019 - 2019 Subaru Outback, 2017 - 2017 Subaru Outback, 2015 - 2019 Subaru Legacy, 2015 - 2016 Subaru Outback, 2013 - 2021 Subaru WRX STI, 2013 - 2016 Subaru WRX, 2010 - 2013 Subaru Legacy, 2010 - 2013 Subaru Outback, 2010 - 2012 Subaru Legacy, 2008 - 2013 Subaru Tribeca, 2008 - 2011 Subaru Impreza, 2008 - 2009 Subaru Legacy, 2008 - 2009 Subaru Legacy, 2006 - 2007 Subaru B9 Tribeca, 2003 - 2006 Subaru Baja, 2002 - 2005 Subaru Impreza, 2001 - 2009 Subaru Outback, 2000 - 2012 Subaru Outback, 1998 - 2014 Subaru Impreza, 1998 - 2013 Subaru Forester
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Subaru
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DW8U
Note
【Note-1】 Start to Open Temperature: 77℃.
【Note-2】 2010-2012 Subaru Legacy H4 2.5L fit Naturally Aspirated only, NOT fit Turbocharged.
【Note-3】 2017 Subaru Outback H6 3.6L fit 3.6R Touring Model only, NOT fit 3.6R Limited or 3.6R Premium.
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Engine Coolant Thermostat for Subaru Outback Forester Impreza Legacy Tribeca 60℃
A-Premium®Part # APTHE073
Engine Coolant Thermostat for Subaru Outback Forester Impreza Legacy Tribeca 60℃
52 Reviews
CA$27.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2019 - 2019 Subaru Outback, 2017 - 2017 Subaru Outback, 2013 - 2020 Subaru WRX STI, 2013 - 2014 Subaru WRX, 2010 - 2019 Subaru Legacy, 2010 - 2016 Subaru Outback, 2010 - 2012 Subaru Legacy, 2008 - 2014 Subaru Tribeca, 2008 - 2011 Subaru Impreza, 2008 - 2009 Subaru Legacy, 2008 - 2009 Subaru Legacy, 2006 - 2007 Subaru B9 Tribeca, 2003 - 2006 Subaru Baja, 2002 - 2005 Subaru Impreza, 2001 - 2009 Subaru Outback, 2000 - 2012 Subaru Outback, 1998 - 2014 Subaru Impreza, 1998 - 2013 Subaru Forester, 1996 - 2009 Subaru Legacy, 1995 - 2001 Subaru Impreza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Subaru
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DXAA
Note
【Note-1】 Start to Open Temperature: 60℃.
【Note-2】 2010-2012 Subaru Legacy H4 2.5L fit Naturally Aspirated only, NOT fit Turbocharged.
【Note-3】 2017 Subaru Outback H6 3.6L fit 3.6R Touring Model only, NOT fit 3.6R Limited or 3.6R Premium.
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℃
52 Reviews
CA$40.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2022 - 2024 Toyota GR86, 2022 - 2023 Subaru Impreza, 2018 - 2020 Mitsubishi Outlander PHEV, 2018 - 2018 Mitsubishi Outlander, 2018 - 2018 Subaru Outback, 2017 - 2020 Toyota 86, 2017 - 2017 Subaru Outback, 2016 - 2021 Subaru Crosstrek, 2016 - 2017 Mitsubishi Lancer, 2015 - 2021 Subaru Impreza, 2015 - 2020 Mitsubishi Outlander Sport, 2015 - 2019 Subaru Legacy, 2015 - 2019 Subaru Outback, 2014 - 2016 Scion FR-S, 2013 - 2020 Subaru BRZ, 2013 - 2015 Subaru XV Crosstrek, 2013 - 2014 Subaru Legacy, 2013 - 2014 Subaru Outback, 2013 - 2013 Scion FR-S, 2012 - 2014 Subaru Impreza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Subaru
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DVR7
Note
Start to Open Temperature: 89℃.
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℃
52 Reviews
CA$40.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2022 - 2023 Mitsubishi Outlander PHEV, 2022 - 2023 Subaru Impreza, 2022 - 2022 Mitsubishi Outlander, 2021 - 2021 Subaru Crosstrek, 2018 - 2023 Mitsubishi Outlander Sport, 2018 - 2021 Mitsubishi Outlander PHEV, 2018 - 2020 Mitsubishi Outlander Sport, 2018 - 2018 Mitsubishi Outlander, 2018 - 2018 Subaru Outback, 2017 - 2019 Toyota 86, 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, 2017 - 2017 Mitsubishi Outlander, 2017 - 2017 Mitsubishi Outlander, 2017 - 2017 Mitsubishi Outlander
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Subaru
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DV7W
Note
Start to Open Temperature: 87℃.
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.

Related Blogs

Why Does Coolant Boil After You Turn the Engine Off?

Learn why coolant boils or bubbles after you turn the engine off, how heat soak affects the cooling system, and how to diagnose leaks, trapped air, cap, thermostat, fan, water pump, or head gasket problems.

Jul 29, 2026