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Mitsubishi Montero Thermostat

2 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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A-Premium APTHE081 Engine Coolant ThermostatA-Premium APTHE081 Engine Coolant Thermostat
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2-year warranty
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Fits 2017 - 2017 Mitsubishi Mirage, 1999 - 2001 Suzuki Esteem, 1999 - 2001 Suzuki Vitara, 1997 - 1999 Mitsubishi 3000GT, 1996 - 1998 Suzuki Sidekick, 1995 - 1996 Mitsubishi Mighty Max, 1994 - 1994 Suzuki Samurai, 1992 - 2000 Plymouth Grand Voyager, 1992 - 1996 Mitsubishi Diamante, 1992 - 1994 Plymouth Sundance, 1992 - 1992 Mitsubishi Expo, 1992 - 1992 Plymouth Colt, 1991 - 1996 Mercury Tracer, 1991 - 1994 Mercury Capri, 1991 - 1992 Mitsubishi Mirage, 1990 - 1994 Mitsubishi Eclipse, 1990 - 1994 Mitsubishi Mighty Max, 1990 - 1994 Plymouth Laser, 1990 - 1993 Mitsubishi Mighty Max, 1989 - 1995 Plymouth Acclaim
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Vehicle: Mitsubishi Montero
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V56V
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A-Premium APTHE001 Engine Coolant Thermostat
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A-Premium APTHE001 Engine Coolant Thermostat
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Fits 2020 - 2020 Nissan Armada, 2019 - 2020 Mitsubishi Outlander, 2016 - 2016 Nissan Frontier, 2016 - 2016 Nissan NV1500, 2016 - 2016 Nissan NV2500, 2016 - 2016 Nissan NV3500, 2015 - 2015 INFINITI Q70L, 2014 - 2016 INFINITI QX80, 2014 - 2015 INFINITI Q70, 2014 - 2014 INFINITI QX70, 2013 - 2015 Acura RDX, 2012 - 2017 Nissan NV2500, 2012 - 2017 Nissan NV3500, 2012 - 2012 Honda Crosstour, 2011 - 2013 INFINITI M56, 2010 - 2014 Acura TSX, 2010 - 2013 Acura ZDX, 2010 - 2011 Honda Accord Crosstour, 2010 - 2011 Mitsubishi Endeavor, 2009 - 2014 Acura TL
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Mitsubishi Montero
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2X1
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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