AISIN Engine Coolant Thermostat P/N:THZ-008
Help keep your engine at its designed operating temperature with the AISIN Engine Coolant Thermostat (THZ002). This engine coolant thermostat drops in as a direct-fit replacement for many vehicles, including the 2020 Toyota Yaris 1.5L and 2011-2014 Mazda 2 1.5L — see the "Vehicles it fits" section for the full list. AISIN manufactures it for exact OE form, fit and function to help maintain cooling-system performance.
The thermostat stays closed during warm-up to speed the engine to operating temperature, then opens at its rated temperature to route coolant to the radiator. Signs it may need replacing include overheating, an engine that runs cold, or a fluctuating temperature gauge. If a stuck thermostat is the cause of those symptoms, this assembly replaces it. Country of origin: Japan.
Interchange: 143-0724 · 8AGX-15-171 · FS05-15-171 · KL01-15-171 · KL01-15-171A · 319-180 · 90118-WB459 · 17670-77E10 · 17670-77E11 · WV52MA-82
1430724 · 8AGX15171 · FS0515171 · KL0115171 · KL0115171A · 319180 · 90118WB459 · 1767077E10 · 1767077E11 · WV52MA82 · 33908 · 34826 · KL0115171A9U · 14048 · 48478
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What does the AISIN THZ002 engine coolant thermostat do?
It regulates coolant flow based on engine temperature — staying closed during warm-up, then opening to route coolant to the radiator to help keep the engine within its intended temperature range.
At what temperature does this thermostat start to open?
It has a start-to-open temperature of 82°C (179.6°F).
Does it include a gasket or seal?
Yes. A gasket/seal is included, along with a jiggle pin check valve that helps bleed trapped air from the thermostat housing during service.
What is it made of?
The thermostat is built with brass and stainless steel.
What are signs this thermostat may need replacing?
Common signs include engine overheating, an engine that runs cold, or a fluctuating temperature gauge. Diagnose the cause first; if a stuck thermostat is at fault, this assembly replaces it.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.