About this part
What it does. Aisin Engine Coolant Thermostat Assembly Aisin 170-THF-006 is part of the cooling system that carries engine heat away and holds the engine at operating temperature.
Symptoms that point to this part
- Temperature gauge climbing
- Coolant puddles under the car
- Heater blowing cold
- Sweet coolant smell
Fitment. Catalogued as fitting 2021–2025 Subaru Ascent, 2024–2025 Subaru Crosstrek, 2022–2023 Subaru Legacy, 2020–2023 Subaru Outback, 2020–2023 Subaru Wrx. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.