Best Car Engine Thermostats of 2025

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Car engine thermostats are essential components that help regulate the temperature of the engine. They play a crucial role in keeping the engine running smoothly and efficiently by controlling the flow of coolant through the engine. These thermostats are designed to open and close at specific temperatures to maintain the engine's optimal operating temperature. They are available in a range of sizes and temperature ranges to suit different types of vehicles. Investing in a high-quality car engine thermostat can help extend the life of the engine, improve fuel efficiency, and reduce emissions.
At a Glance: Our Top Picks
Top 10 Car Engine Thermostats
febi bilstein Thermostat with Casing and Seals
The febi bilstein Thermostat is an original spare part designed for various BMW models, ensuring high compatibility and reliability. With an opening temperature of 88 °C, it helps maintain optimal engine performance, preventing overheating. Made from durable plastic, this thermostat is lightweight at only 0.235 kg, making it easy to handle during installation. As a product made in Germany, you can trust its quality and craftsmanship, giving you peace of mind as you keep your vehicle running smoothly.
GATES Thermostat TH11287G1 with Enhanced Performance
The GATES TH11287G1 Thermostat offers several significant advantages for your vehicle. With a higher operating temperature level, it helps to optimise engine performance, ensuring smoother driving and enhanced responsiveness. Additionally, it contributes to reduced fuel consumption, allowing you to save on fuel costs. Lower pollution emissions mean that you can drive with a clearer conscience, knowing you are minimising your environmental impact. Overall, this thermostat enhances your vehicle's efficiency and performance, providing a better driving experience.
febi bilstein 170648 Thermostat with Gasket
The febi bilstein Thermostat is an original vehicle part made in Germany, ensuring reliability and performance. With an opening temperature of 95 °C, it helps maintain your engine's optimal operating temperature, preventing overheating. Its outer diameter of 44 mm makes it a compatible choice for several models, including the Audi and VW ranges. Weighing just 0.24 kg, it is lightweight, making installation straightforward and hassle-free for you.
febi bilstein Thermostat with O-Ring for Vehicles
The febi bilstein Thermostat is an original spare part made in Germany, ensuring reliable quality for your vehicle. It operates at an opening temperature of 87 °C, which helps maintain optimal engine performance and efficiency. Weighing just 0.05 kg, it is lightweight and easy to handle during installation. To ensure compatibility, you can use the vehicle identification feature to confirm that this thermostat fits your specific make and model, providing peace of mind for your purchase.
Frankberg Engine Coolant Thermostat Housing
The Frankberg Thermostat Housing is designed for specific vehicle models, including the 500, Panda, KA RU8, and Ypsilon, all with a 1.2L engine. This ensures compatibility, making it easier for you to find the right part for your car. It comes complete with the necessary gasket and sensor, providing convenience during installation. The opening temperature of 88°C helps maintain optimal engine performance, preventing overheating and ensuring efficiency in your vehicle’s operation.
X AUTOHAUX Car Engine Coolant Thermostat for Honda and Acura
The X AUTOHAUX Thermostat is designed for various Honda and Acura models, ensuring a perfect fit. With OE numbers 19301-RNA-315, 19301-RNA-305, and 19301-RNA-306, this thermostat directly replaces broken units, providing a hassle-free solution. It allows maximum coolant flow, which prevents costly engine damage. Before purchasing, it is advisable to verify compatibility with your vehicle to ensure optimal performance and longevity.
Blue Print ADC49205 Car Engine Thermostat
The Blue Print ADC49205 Thermostat is an original spare part designed for reliable performance in your vehicle. It is essential for maintaining the engine's optimal temperature, opening at 82 °C, which helps prevent overheating and engine damage. With an outer diameter of 56 mm, it fits various models, ensuring compatibility. Weighing just 0.142 kg, it is lightweight and easy to handle during installation. Always check your vehicle's compatibility before purchase to ensure a perfect fit.
Frankberg Engine Coolant Thermostat with Housing
The Frankberg Engine Thermostat is designed to fit a wide range of vehicles, including models from 2008 to today. This compatibility ensures you can easily replace your thermostat without worrying about fitment issues. It comes with a housing and seal, providing a complete solution for your engine cooling needs. The product includes various reference numbers, making it easier for you to identify the correct replacement part for your vehicle. By using this thermostat, you can maintain optimal engine performance and avoid overheating.
Frankberg Engine Coolant Thermostat for 3 Series
The Frankberg Thermostat is designed for various models including the 3 Series E46 and X3 E83, specifically for 4 or 6-cylinder petrol engines produced between 1998 and 2009. This product ensures optimal engine temperature control, which is vital for performance and longevity. By maintaining the correct temperature, it helps prevent overheating, thus saving you from costly repairs. Additionally, its compatibility with several vehicle models makes it a versatile choice for many car owners. Always check your OEM references to ensure a proper fit.
febi bilstein 28668 Thermostat with Gasket
The febi bilstein Thermostat is an original spare part, proudly made in Germany, ensuring high quality and reliability for your vehicle. With an opening temperature of 92 °C and a secondary opening at 107 °C, it effectively regulates your engine's temperature, enhancing performance. The lightweight aluminium construction (0.150 kg) makes it easy to handle during installation. Additionally, it is crucial to confirm compatibility with your vehicle using the provided identification, ensuring a perfect fit and optimal functionality.
Frequently Asked Questions (FAQs)
1. How do you know if your thermostat is bad in your car?
One of the first things you will notice is the temperature gauge is higher than normal. It may even start to fluctuate frequently. If you notice the gauge is hovering ¾ of the way from the top, then your thermostat is experiencing damage in the form of overheating. This can soon lead to your engine and car overheating.
2. How much does a car thermostat change cost?
Unfortunately, thermostats play an essential role in your car. So fixing a car thermostat will usually cost somewhere in the range of $200 to $300.
3. How do you know if your car thermostat is working?
Start your car's engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.
During our car engine thermostat research, we found 306 car engine thermostat products and shortlisted 10 quality products. We collected and analyzed 6,263 customer reviews through our big data system to write the car engine thermostats list. We found that most customers choose car engine thermostats with an average price of £17.85.
The car engine thermostats are available for purchase. We have researched hundreds of brands and picked the top brands of car engine thermostats, including febi bilstein, Gates, Frankberg, X AUTOHAUX, Blue Print. The seller of top 1 product has received honest feedback from 1,629 consumers with an average rating of 4.5.

Joseph is a seasoned writer who's also passionate about automotive. His passion for automotive care and maintenance fuels his drive for more knowledge in the field. He currently resides in Middlesbrough, where he finds time to write informative contents on automotive. His automotive related articles are quite popular in journals around the world. Joseph continues to use his wealth of experience in the industry to create helpful guides on automotive.