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INFINITI G20 Thermostat

4 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 APTHE004 Engine Coolant ThermostatA-Premium APTHE004 Engine Coolant Thermostat
A-Premium®Part # APTHE004
A-Premium APTHE004 Engine Coolant Thermostat
4.685 Reviews
$31.99
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2-year warranty
90 days free return
Fits 1980 - 1982 AMC Concord, 1981 - 1983 AMC Eagle, 1977 - 1977 AMC Gremlin, 1980 - 1982 AMC Spirit, 1979 - 1979 AMC Spirit, 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 1982 - 1982 Datsun 720, 1978 - 1978 Dodge D100, 1979 - 1979 Dodge D100, 1978 - 1978 Dodge D150, 1979 - 1980 Dodge D150, 1978 - 1978 Dodge D200, 1980 - 1980 Dodge D200, 1983 - 1985 Dodge Power Ram 50, 1983 - 1985 Dodge Ram 50, 1978 - 1978 Dodge W150, 1979 - 1979 Dodge W150, 1978 - 1978 Dodge W200, 1979 - 1979 Dodge W200
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Vehicle: INFINITI G20
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2C8
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Beck/Arnley 143-0818 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0818
Beck/Arnley 143-0818 Engine Coolant Thermostat
51 Reviews
$30.99
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3-year warranty
90 days free return
Fits 2001-2002 INFINITI G20, 2014-2016 INFINITI QX60, 2017-2017 INFINITI QX60, 2002-2005 Nissan Sentra, 2002-2006 Nissan Altima, 2005-2006 Nissan Frontier, 2007-2008 Nissan Altima, 2007-2008 Nissan Altima, 2007-2008 Nissan Altima, 2007-2012 Nissan Sentra, 2007-2019 Nissan Frontier, 2008-2016 Nissan Rogue, 2009-2009 Nissan Altima, 2010-2011 Nissan Altima, 2010-2011 Nissan Altima, 2010-2011 Nissan Altima, 2012-2018 Nissan Altima, 2014-2015 Nissan Pathfinder, 2014-2015 Nissan Rogue Select, 2016-2016 Nissan Murano
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: INFINITI G20
Item LocatedUnited States
Quantity1
Part interchange
143-0818
item #1000XH36
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Beck/Arnley 143-0717 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0717
Beck/Arnley 143-0717 Engine Coolant Thermostat
51 Reviews
$24.99
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3-year warranty
90 days free return
Fits 1991-1996 INFINITI G20, 1999-2000 INFINITI G20, 1989-1998 Nissan 240SX, 1990-1990 Nissan Axxess, 1990-1992 Nissan Stanza, 1991-1993 Nissan NX, 1991-1994 Nissan Sentra, 1993-1994 Nissan D21, 1993-2001 Nissan Altima, 1995-1995 Nissan Pickup, 1995-1998 Nissan 200SX, 1996-1997 Nissan Pickup, 1998-1998 Nissan Frontier, 1998-2001 Nissan Sentra, 1999-2004 Nissan Frontier, 2000-2004 Nissan Xterra
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Vehicle: INFINITI G20
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0717
item #1000XHUC
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Vemo V25-99-1710 Engine Coolant Thermostat
VemoPart # V25-99-1710
Vemo V25-99-1710 Engine Coolant Thermostat
57 Reviews
$34.99
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3-year warranty
90 days free return
Fits 1999-1999 INFINITI G20, 2000-2002 INFINITI G20, 2014-2015 INFINITI QX60, 2016-2016 INFINITI QX60, 2017-2017 INFINITI QX60, 2002-2004 Nissan Altima, 2002-2004 Nissan Sentra, 2005-2005 Nissan Altima, 2005-2005 Nissan Frontier, 2005-2005 Nissan Sentra, 2006-2006 Nissan Altima, 2006-2007 Nissan Frontier, 2006-2007 Nissan Sentra, 2007-2018 Nissan Altima, 2008-2012 Nissan Rogue, 2008-2012 Nissan Sentra, 2008-2018 Nissan Frontier, 2013-2015 Nissan Rogue, 2014-2014 Nissan Pathfinder, 2014-2015 Nissan Rogue Select
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: INFINITI G20
Item LocatedUnited States
Quantity1
Part interchange
V25-99-1710, 78276S, 78459S, 78645, 78289, 22892, 42288, 23382, 
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item #1001QRC6
Note
Without gasket/seal
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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