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Nissan 240SX Thermostat

3 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
4.683 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: Nissan 240SX
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2C8
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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: Nissan 240SX
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0717
item #1000XHUC
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Engine Coolant Thermostat - Mahle TX 170 77
MahlePart # TX 170 77
Engine Coolant Thermostat - Mahle TX 170 77
51 Reviews
$24.99
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3-year warranty
90 days free return
Fits 1989-1998 Nissan 240SX, 1990-1990 Nissan Axxess, 1990-1992 Nissan Stanza, 1990-1994 Nissan D21, 1991-1994 Nissan Sentra, 1993-2001 Nissan Altima, 1995-1995 Nissan Pickup, 1995-1998 Nissan 200SX, 1996-1997 Nissan Pickup, 1996-2001 Nissan Sentra, 1998-1998 Nissan Frontier, 1999-2004 Nissan Frontier, 2000-2004 Nissan Xterra
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Vehicle: Nissan 240SX
Item LocatedUnited States
Quantity1
Part interchange
TX 170 77, 21200-OC811, 34011, 48447, TX17077, 2028-170
item #1000XSVZ
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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.

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Jul 29, 2026