Beat the Heat – Summer Essential Maintenance
24/7 Customer service
USD
Add your vehicle
Address
Login
Cart
Item
$0.00
Add your vehicle to ensure fitment/Choose a yearRequired Fields
Select a different vehicle
Make/Model
VIN
Save

2021 Subaru Crosstrek Thermostat

2 items

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

  • All filters
  • Sort By
  • Price
  • Brand
  • Warranty
Engine Coolant Thermostat for Subaru Outback 13-19 Forester Impreza Toyota 89℃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℃
4.683 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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Subaru Crosstrek
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℃
4.683 Reviews
$23.99
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2021 Subaru Crosstrek
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