Engine, timing and cooling
Thermostat replacement: what it costs
Wide range: this job varies a lot. Itemize your quote for a better answer.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $10 | $90 |
| Labor: 0.8 to 2 hours × $110 to $150 an hour | $88 | $300 |
| Fees: shop supplies, disposal, diagnostics | $10 | $25 |
| Total, rounded | $100 | $420 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
The thermostat controls engine temperature. A stuck one can cause overheating, no heat from the vents, or poor mileage.
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What is usually included
- New thermostat and gasket or housing
- Coolant top-off or refill
- Bleed air from the system
- Check temperature readings
- Test drive
What moves the price
- Housing built into the thermostat
- Location on the engine
- Coolant type and amount
- Bolt access and sensors
Questions to ask before you say yes
- Is the housing included in the part?
- What coolant is used?
- How did you confirm the thermostat was bad?
- Will you check for coolant leaks after the new thermostat is in?
Can you do it yourself?
A fair DIY on many engines with basic tools; bleed the cooling system correctly to avoid air pockets.
Shopping for the part? Search car parts on eBay (affiliate link, disclosure). Make sure the part fits your car before buying.
Common questions
What are signs of a stuck thermostat?
If it sticks closed, the engine overheats. If it sticks open, the engine runs cool and the heater blows weak air.
Is it a cheap repair?
The part is usually inexpensive, often $10 to $90. The cost depends mostly on how hard it is to reach the housing and how much coolant must be replaced.
Can I drive with a stuck-open thermostat?
Usually yes for a short time, but the engine runs cool, heat is weak and mileage drops. Over time it adds wear, so plan the repair soon.
How much does thermostat replacement cost?
A typical range across the US is $100 to $420. That is an estimate from parts prices, labor hours and the local labor rate, not a quote.
Typical range in 10 metro areas
Only the labor rate changes between cities. Same parts, same hours.
| Area | Typical range, estimate |
|---|---|
| Boston area, Massachusetts | $120 to $470 |
| New York City area | $110 to $450 |
| Los Angeles area, California | $110 to $460 |
| Chicago area, Illinois | $110 to $430 |
| Houston area, Texas | $100 to $410 |
| Dallas-Fort Worth area, Texas | $100 to $410 |
| Phoenix area, Arizona | $100 to $420 |
| Atlanta area, Georgia | $110 to $430 |
| Miami area, Florida | $100 to $420 |
| Seattle area, Washington | $120 to $460 |