Car Thermostat Replacement Costs

The average cost for car thermostat replacement is $661 to $747. Enter your vehicle's information to see how much thermostat replacement costs in your local area.

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What You Should Know About Car Thermostat Replacement Costs

Cost Factors
Bad Thermostat Symptoms
Potential Costs If You Don’t Fix the Car Thermostat
How Long Should a Car Thermostat Last?

A car thermostat is a small device that helps regulate your engine’s temperature, ensuring optimal performance and preventing overheating. But what happens when it needs to be replaced, and how much can you expect to pay?

Factors Affecting Car Thermostat Replacement Costs

First and foremost, the make and model of your car can significantly impact the price. Luxury or high-performance vehicles may require specialized parts, leading to a more expensive thermostat replacement. Additionally, the labor cost for the repair may vary depending on your location and the mechanic’s hourly rate.

Another factor to consider is the type of thermostat your vehicle uses. There are three main types of car thermostats: electronic, traditional mechanical, and variable.

Electronic models are more advanced and may incur higher car thermostat replacement costs than their mechanical counterparts. Variable thermostats offer the greatest level of control over your engine’s temperature but can also be the most costly to replace.

Signs of a Bad Thermostat

The most common sign of a bad thermostat is an engine that runs too hot or cold. Additionally, most modern vehicles have computer monitoring that will trigger a check engine light and store a code. An example code is P0128.

If your engine temperature rises beyond the normal operating range, it could indicate a faulty thermostat.

Some other signs of a failing thermostat are:

Fluctuating temperature gauge
Coolant leaks around the thermostat housing
Strange noises
Poor fuel economy
Poor cabin heating
High idling

As you can see, most of these symptoms will probably allow you to keep driving your vehicle. But is that a good idea?

While it may be possible to continue driving your car with a faulty thermostat, doing so could cause more significant issues down the line. It’s best to address the problem as soon as possible to avoid additional costs and inconvenience.

Costs if You Don't Replace Your Thermostat

Neglecting to replace a faulty thermostat can lead to a host of problems, including engine overheating, decreased fuel efficiency, and inadequate cabin heating. Prolonged overheating can cause severe engine damage, such as a blown head gasket or warped cylinder head, both of which can be incredibly costly to repair.

Another possible consequence of a bad thermostat is a blown radiator. If coolant isn’t able to circulate throughout the engine, it can cause pressure to build up in the radiator and eventually lead to a leak or even an explosion.

Finally, if you ignore the warning signs for too long, you may need to replace more parts than just the thermostat, which can easily add hundreds or even thousands to your repair costs.

How Long Should a Car Thermostat Last?

A car thermostat is designed to last a long time – typically around 100,000 miles or 10 years. However, various factors can impact its lifespan.

First, driving conditions play a role. If you regularly drive in hot weather or stop-and-go traffic, your thermostat may suffer additional stress. You may need to replace it sooner. The type of thermostat and how well it’s maintained also affect its lifespan.

Note that regular maintenance is key to extending the life of your thermostat. If you notice any of the warning signs listed above, it’s best to have a professional check it out right away.

See Our Other Car Repair and Maintenance Costs

Content has been reviewed by Gary Hardesty, Kelley Blue Book and Autotrader in-house service and maintenance expert and an A.S.E. certified master technician.

Frequently Asked Questions

What Does a Stuck Thermostat Mean?

A stuck thermostat is one that no longer opens or closes as it should. This can cause the engine to overheat (if the thermostat is stuck closed) or run too cold (if the thermostat is stuck open). In either case, it’s essential to replace the faulty thermostat as soon as possible.

Can I Replace the Thermostat Myself, or Do I Need a Mechanic?

Replacing a car thermostat can be a relatively straightforward DIY job for those with some basic automotive repair knowledge. However, if you’re not confident in your abilities or don’t have the necessary tools, it’s best to leave the task to a professional mechanic.

How Long Does It Take to Replace a Thermostat?

The time it takes to replace a thermostat can vary depending on the vehicle, the vehicle’s age, and the individual performing the repair. In a professional shop, the process takes roughly one hour, while a DIY enthusiast may require a couple of hours to complete the task, especially if they’re unfamiliar with the process. Some older vehicles, however, have a more easily accessible thermostat, which can greatly reduce the time it takes to replace it for both pros and non-pros.