A Guide to the Engine Coolant Thermostat for the 2013-2016 Dodge Dart
If you own a Dodge Dart, you will likely face a check engine light for the thermostat; here’s what you need to know to fix it correctly.
- A failed thermostat is a very common issue on the Dart, most often causing a P0128 check engine light code.
- The part is an integrated assembly with the housing and sensor; you cannot replace just the thermostat valve.
- Consider upgrading to an aftermarket thermostat with an aluminum housing for better durability than the plastic OEM part.
- Before replacing, always check the electrical connector for damage, as it can cause similar symptoms.
Is Your Dodge Dart Thermostat Failing?
A faulty engine coolant thermostat is one of the most common issues for 2013-2016 Dodge Dart owners, regardless of whether you have the 1.4L, 2.0L, or 2.4L engine. This part can fail by either sticking open or sticking closed, each causing a distinct set of problems. Because the temperature sensor is integrated into the housing, a failure can also send incorrect data to your car's computer.
The Dreaded P0128 Code
🎬 Watch: Diagnosing P0128 and P0126 codes on your Dodge DartThe most frequent sign of a bad thermostat on a Dodge Dart is a Check Engine Light with the code P0128 - Coolant Temperature Below Thermostat Regulating Temperature. This almost always means the thermostat is stuck open, preventing your engine from reaching its proper operating temperature, especially at highway speeds or in cold weather. You might notice the temperature gauge dropping while you drive.
Common Symptoms of a Bad Thermostat
- Check Engine Light: As mentioned, the P0128 code is extremely common.
- Engine Overheating: If the thermostat sticks closed, coolant can't get to the radiator, causing the engine temperature to rise dangerously high.
- Erratic Temperature Gauge: The gauge on your dashboard may swing from normal to hot, or from normal to cold, sometimes giving wildly inaccurate readings like -40°F.
- Poor Heater Performance: If the thermostat is stuck open, the engine never gets hot enough to provide strong heat to the cabin in winter.
- Coolant Leaks: The plastic housing of the original thermostat can crack over time, leading to coolant leaks.
Choosing the Right Aftermarket Thermostat
For the Dodge Dart, you must replace the entire thermostat assembly, which includes the housing and sensor. You cannot buy just the internal thermostat valve. When shopping for a replacement, you have a few options.
OEM vs. Aftermarket Quality
The original Mopar thermostat housing is made of plastic, which can become brittle and fail over time. Many aftermarket brands offer a direct replacement, but some also provide an upgraded version made from aluminum. An aluminum housing is more durable and resistant to cracking, making it a smart upgrade to prevent future failures.
When choosing an aftermarket brand, consider established names known for quality cooling system parts:
- Gates: A well-respected brand in the aftermarket for belts, hoses, and cooling components.
- Facet: Markets itself as an OE-equivalent part and generally receives positive feedback.
- Crown Automotive: Specializes in parts for Chrysler/Dodge/Jeep vehicles and offers a replacement for the 2.4L Dart.
Owner experiences suggest that avoiding the cheapest online options is a good idea to ensure reliability.
Pro Tip: Check the Connector
Sometimes, the thermostat itself is fine, but the electrical connector to the temperature sensor is loose or corroded. Before replacing the whole assembly, inspect the wiring and connector for any visible damage. If you've replaced the thermostat and the problem persists, the connector pigtail may need to be replaced.
Cost to Replace a Dodge Dart Thermostat
| Part Type | Estimated Part Cost | Estimated Labor Cost | Estimated Total Cost |
|---|---|---|---|
| New OEM (Mopar) | $70 - $90 | $250 - $400 | $320 - $490 |
| New Aftermarket | $71 - $88 | $250 - $400 | $321 - $488 |
Cost estimates are based on national averages and may vary by location and repair shop. Part costs reflect a range of available options.
Frequently Asked Questions
Are there any recalls for the Dodge Dart thermostat?
No, there are no recalls from the NHTSA specifically for the engine coolant thermostat on the 2013-2016 Dodge Dart. There are, however, numerous Technical Service Bulletins (TSBs) related to the powertrain and cooling system.
Can I replace a Dodge Dart thermostat myself?
Yes, this is a feasible DIY job for someone with moderate mechanical skill and the right tools. However, access is tight, and some bolts are difficult to reach. The job requires draining the cooling system, removing the air intake ducting, and carefully maneuvering around other components. Expect it to take 2-4 hours.
🎬 See this step-by-step walkthrough for replacing the thermostat assemblyWhy does my temperature gauge say it's -40°F?
This is a specific symptom of a failed integrated temperature sensor or a bad electrical connection on your Dart's thermostat housing. The car's computer interprets the fault as an impossibly cold temperature, which often forces the radiator fans to run at full speed as a fail-safe. Replacing the thermostat assembly usually fixes this.
Should I replace anything else at the same time?
Since you have to drain the cooling system, it is an excellent time to replace the upper and lower radiator hoses if they are old or soft. 🎬 Watch: How to fix coolant leaks and replace heater hoses Always refill the system with fresh, new coolant that meets Chrysler's MS-12106 specification.
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Technical Specifications
OEM Part Numbers: 4892642AD
Fits 2013-2016 Dodge Dart with 1.4L, 2.0L, and 2.4L engines. The thermostat is an integrated assembly with the housing and temperature sensor. The OEM part features a plastic housing, while some aftermarket upgrades are available in aluminum.
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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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- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Dodge Dart Thermostat Failing?
- The Dreaded P0128 Code
- Common Symptoms of a Bad Thermostat
- Choosing the Right Aftermarket Thermostat
- OEM vs. Aftermarket Quality
- Pro Tip: Check the Connector
- Cost to Replace a Dodge Dart Thermostat
- Frequently Asked Questions
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