Thermostat/Water Inlet Assembly

Regulates the engine’s temperature by controlling coolant flow into the engine.

The thermostat/water inlet assembly regulates the flow of coolant into the engine, ensuring that the engine operates within the optimal temperature range by allowing coolant to flow when needed and restricting it when not required.

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Typical part cost

$50–$150🔒

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Typical labor cost

$100–$200🔒

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Typically lasts

100,000–200,000 mi

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Or about

7.0–10.0 years

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DIY difficulty

4/10

⚠️ Owners Often Notice

If the Thermostat/Water Inlet Assembly is starting to fail, these are the signs owners most commonly report before it gets worse:

Engine overheating

Coolant not circulating

Poor cooling performance

Related Services

Services commonly performed on or around this part.

Replace Thermostat/Water Inlet Assembly

No standard interval on file

Inspect Thermostat/Water Inlet Assembly

No standard interval on file

Test Thermostat/Water Inlet Assembly

No standard interval on file