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2020 Volkswagen Jetta 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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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: 2020 Volkswagen Jetta
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2C8
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A-Premium APTHE005 Engine Coolant Thermostat
A-Premium®Part # APTHE005
A-Premium APTHE005 Engine Coolant Thermostat
4.683 Reviews
$20.99
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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, 1982 - 1982 Isuzu I-Mark, 1984 - 1984 Isuzu I-Mark, 1985 - 1987 Jaguar Vanden Plas, 1978 - 1978 Jaguar XJ6, 1983 - 1987 Jaguar XJ6, 1971 - 1974 Jaguar XKE, 1980 - 1983 Jeep CJ5, 1980 - 1983 Jeep CJ7, 1980 - 1983 Jeep DJ5, 1981 - 1983 Jeep Scrambler, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 1991 - 2011 Lincoln Town Car
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2020 Volkswagen Jetta
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V0CQ
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A-Premium APTHE069 Engine Coolant Thermostat
A-Premium®Part # APTHE069
A-Premium APTHE069 Engine Coolant Thermostat
4.683 Reviews
$22.99
Low stock: Only 5 left
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2-year warranty
90 days free return
Fits 2013 - 2013 Audi A3, 2016 - 2018 Audi A3 Sportback e-tron, 2021 - 2021 Volkswagen Golf, 2019 - 2020 Volkswagen Golf, 2019 - 2019 Volkswagen Golf SportWagen, 2013 - 2020 Volkswagen Jetta
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Vehicle: 2020 Volkswagen Jetta
Item LocatedUnited States
Quantity1
ConditionNew
item #1005V3EG
Note
This item comes with thermostat insert and seal.
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A-Premium APTHE003 Engine Coolant Thermostat
A-Premium®Part # APTHE003
A-Premium APTHE003 Engine Coolant Thermostat
4.683 Reviews
$20.99
Edit ZIP code
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2020 Volkswagen Jetta
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2KW
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Beck/Arnley 143-0965 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0965
Beck/Arnley 143-0965 Engine Coolant Thermostat
51 Reviews
$26.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2016-2016 Audi A3 Sportback e-tron, 2013-2020 Volkswagen Jetta, 2019-2019 Volkswagen Golf SportWagen, 2019-2020 Volkswagen Golf
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Vehicle: 2020 Volkswagen Jetta
Item LocatedUnited States
Quantity1
Part interchange
143-0965
item #1000XK6U
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Beck/Arnley 143-0913 Engine Coolant Thermostat Housing Assembly
Beck/ArnleyPart # 143-0913
Beck/Arnley 143-0913 Engine Coolant Thermostat Housing Assembly
51 Reviews
$263.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2015-2016 Audi A3, 2015-2020 Audi A3 Quattro, 2015-2020 Audi S3, 2016-2018 Audi A6, 2016-2023 Audi A6 Quattro, 2016-2023 Audi TT Quattro, 2016-2023 Audi TTS Quattro, 2017-2020 Audi A3, 2017-2020 Audi A4, 2017-2023 Audi A4 Quattro, 2017-2023 Audi A4 allroad, 2017-2023 Audi Q7, 2018-2023 Audi A5 Quattro, 2018-2023 Audi A5 Sportback, 2018-2023 Audi Q5, 2019-2023 Audi Q3, 2020-2023 Audi Q5 PHEV, 2021-2022 Audi A7 Sportback, 2021-2023 Audi Q5 Sportback, 2022-2023 Audi A3
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2020 Volkswagen Jetta
Item LocatedUnited States
Quantity1
Part interchange
143-0913
item #1000X8PQ
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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