How much does thermostat replacement cost?

Typically $150–$400 at a US independent shop — about $20–$80 in parts and $100–$300 in labor for a mainstream vehicle. Your exact cost depends on your year, make, model, and engine. The free AI Mechanic gives a vehicle-specific estimate.

What makes thermostat replacement cheaper or more expensive?

Housing location/access; Coolant replaced with it; Some are integrated with the housing.

Thermostat replacement cost

A thermostat replacement typically costs $150–$400 at a US independent shop for a mainstream vehicle — but your exact cost depends on your year, make, model, and engine.

Parts: $20–$80
Labor: $100–$300
Total: $150–$400

A stuck thermostat causes overheating (stuck closed) or a P0128 "coolant below regulating temperature" and poor heat (stuck open). The part is cheap; cost depends on how buried the housing is.

What affects the price

Housing location/access
Coolant replaced with it
Some are integrated with the housing

DIY vs. shop

Easy-to-intermediate DIY, saving $100–300.

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Ranges like this are a starting point. Tell the AI Mechanic your year, make, model, and the symptom or OBD2 code — it estimates the cost for your exact vehicle, flags the likely cheap fix before the expensive one, and tells you when a shop is genuinely the right call.

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Related codes: P0128 , P0125

Related symptoms: Engine overheating

More repair costs

catalytic converter $900–$2,500 alternator $400–$900 brake pads $150–$350 brake rotors $300–$600 timing belt $500–$1,000 spark plugs $150–$400