Engine Coolant Thermostat Guide for the 2010-2016 Kia Soul
Keep your Soul's engine temperature in check by understanding the signs of a failing thermostat and how to choose the right replacement.
- A failing thermostat can cause overheating, poor heating, and a P0128 check engine light code.
- Do not drive if the engine is overheating, as this can cause catastrophic engine damage.
- For a DIY replacement, consider buying a full thermostat and housing assembly, as the original plastic can become brittle.
- Always use a new gasket and ensure the thermostat is installed in the correct orientation to prevent leaks and ensure proper function.
Is Your Kia Soul's Thermostat Failing?
A bad thermostat can cause serious engine problems, from poor performance to overheating. In the 2010-2016 Kia Soul, a faulty thermostat is a common reason for cooling system issues. It can fail in two ways: stuck open or stuck closed.
A thermostat that's stuck closed is the most dangerous, as it will quickly lead to engine overheating by trapping coolant in the engine. If you see your temperature gauge spike into the red, pull over immediately to prevent catastrophic engine damage.
Key Failure Symptoms
- Engine Overheating: The temperature gauge climbs into the red. This is the most serious symptom, often caused by a thermostat stuck closed.
- Engine Slow to Warm Up: If your heater takes a very long time to blow warm air or your temperature gauge stays low, the thermostat may be stuck open.
- Check Engine Light: A common trouble code associated with a failing thermostat is P0128 (Coolant Temperature Below Thermostat Regulating Temperature). This code usually means the thermostat is stuck open.
- Poor Heater Performance: No heat or lukewarm air from the vents is a classic sign, as the engine isn't reaching the proper temperature to provide hot coolant to the heater core.
- Temperature Gauge Fluctuations: If the needle on your temperature gauge moves erratically, it could point to a thermostat that is sticking or opening and closing at the wrong times.
Known Issues, Recalls, and TSBs
While there are no specific recalls from the National Highway Traffic Safety Administration (NHTSA) for the engine coolant thermostat on the 2010-2016 Kia Soul, there are recalls for related engine issues. Notably, recall SC176 affects 2012-2016 models with the 1.6L GDI engine, where high exhaust temperatures could damage the catalytic converter and, in turn, the engine pistons. While not directly a thermostat issue, it highlights the importance of a properly functioning cooling system to prevent overheating conditions.
Choosing the Right Aftermarket Thermostat
For the Kia Soul, the original equipment (OEM) thermostat is a reliable choice, but quality aftermarket options can offer significant savings. Aftermarket brands often meet or exceed OEM standards and are designed for a direct fit. When shopping, you'll find the thermostat itself or a complete thermostat and housing assembly.
Aftermarket Brand Tiers
- OEM-Equivalent Quality (Premium): Brands like Gates and Beck Arnley are well-regarded in the aftermarket. Gates is a major OEM supplier for many components, and their thermostats are known for reliability. Beck Arnley focuses on sourcing parts that match the OEM form, fit, and function.
- Standard Aftermarket (Reliable): Brands like Motorad, Calorstat by Vernet, and Facet offer a good balance of quality and value. Motorad thermostats are widely available and are 100% tested and calibrated. Calorstat is also a key OE supplier for many European and domestic vehicles.
| Part Type | Estimated Cost |
|---|---|
| New OEM Part | $35 - $70 |
| New Aftermarket Part | $16.77 - $66.42 |
| Shop Labor | $110 - $177 |
| Total Professional Replacement | $287 - $523 |
Frequently Asked Questions (FAQ)
Can I replace the thermostat myself?
Yes, for a DIYer with some experience, this is a manageable job. It typically involves draining some coolant, removing the thermostat housing 🎬 See how to remove the skid plate and lower hose. (usually held by two or three bolts), swapping the part, and refilling/bleeding the cooling system. The difficulty is rated as low to moderate, and it should take about 1-2 hours.
Should I replace the gasket too?
Absolutely. Never reuse the old thermostat gasket or O-ring. Most new thermostats come with a new gasket or seal included. Applying it correctly is critical to prevent coolant leaks. Some DIY videos show confusion over gasket placement, so be sure the new thermostat sits flush in its housing.
What's the difference between a 180° and 192° thermostat?
This number refers to the temperature at which the thermostat begins to open. Always use the temperature specified for your Soul's engine 🎬 Check out this location and replacement guide for 2.0L engines. (1.6L or 2.0L). Using the wrong temperature can affect engine performance, emissions, and fuel economy.
My check engine light is on with code P0128. Is it definitely the thermostat?
Code P0128 is most commonly caused by a thermostat that is stuck open. However, it can also be triggered by low coolant levels or, more rarely, a faulty engine coolant temperature sensor. Since a stuck thermostat is the most likely culprit, it's the best place to start your diagnosis.
🎬 Watch this step-by-step P0128 fix on a 2010 Soul.Helpful Videos
Technical Specifications
OEM Part Numbers: 25500-2E000
Fits 1.6L and 2.0L engines for the 2010-2016 Kia Soul. Opening temperatures vary (e.g., 180°F, 190°F, 192°F), so confirm the correct spec for your specific engine. Most thermostats come with a required gasket or seal.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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