Jeep Wagoneer 2022-2023 Engine Coolant Thermostat: A Complete Guide
Understanding the common thermostat issues in your WS Wagoneer, especially if you have the 3.0L Hurricane engine.
- This guide is for the modern 2022-2023 Wagoneer (WS), not older models.
- A faulty thermostat is a known issue, especially on the 3.0L Hurricane engine, which can cause sudden overheating.
- Check for TSB 25-047 if you have a 3.0L engine and experience overheating.
- A thermostat stuck open will often trigger a P0128 check engine light code.
A Note on Vehicle Years
This guide covers the modern Jeep Wagoneer (WS platform), which was introduced for the 2022 model year. While there was speculation about a new Wagoneer from 2017-2021, no vehicle was produced for those years. This article applies specifically to the 2022 and 2023 models.
Is Your Wagoneer's Thermostat Failing?
Thermostat failure is a known issue, particularly for Wagoneer models equipped with the 3.0L I6 Hurricane engine. A Technical Service Bulletin (TSB 25-047) has been issued for this problem, which can cause the thermostat to fail in the closed position. This is a serious issue that can lead to rapid engine overheating. If your thermostat fails stuck open, your engine may take a very long time to warm up, your heater may not work well, and your check engine light may come on with a P0128 code.
Known Issue: 3.0L Hurricane Engine Thermostat Failure
Owners of 2022-2024 Wagoneers with the 3.0L twin-turbo engine should be aware of a specific problem identified by Stellantis. The original thermostat's ball valve drive pin can fail, causing the thermostat to get stuck closed. This blocks coolant flow and leads to sudden engine overheating. If you see an "Engine Overheated" message, pull over safely and shut off the engine immediately to prevent damage. The repair is covered in TSB 25-047, and dealers are instructed 🎬 Watch: See how the Hurricane engine thermostat fails internally to replace the faulty thermostat.
Choosing the Right Aftermarket Thermostat
When replacing your thermostat, you have a choice between another Original Equipment (OEM) part from the dealer or an aftermarket part. Given the known issues with the original OEM part on 3.0L models, a high-quality aftermarket part can be a smart choice.
- Tier 1: Established Brands (Gates): Gates is a well-known and generally trusted name in the aftermarket for cooling system components. Choosing a thermostat from a brand like Gates often provides a good balance of quality and value, meeting or exceeding OEM specifications.
- Tier 2: Standard Replacement Brands (Motorad, Calorstat): Brands like Motorad and Calorstat are common in the aftermarket and provide a functional, budget-friendly replacement. While they are a cost-effective solution, some mechanics have noted a difference in build quality compared to top-tier brands or the original OEM part.
Pro Tip: When replacing the thermostat, it's also a good time to inspect your coolant hoses for wear and to replace the coolant itself if it's near the end of its service life. Newer coolants use Organic Acid Technology (OAT) and can last up to 100,000 miles, but check your owner's manual for specific intervals.
Cost of Replacing a Jeep Wagoneer Thermostat
| Part Type | Estimated Part Cost |
|---|---|
| New OEM | $182 - $437 |
| New Aftermarket | $19.78 - $40.05 |
| Shop Labor | $212 - $591 |
Note: Costs are estimates and can vary based on location and specific vehicle configuration. The OEM part cost for the 3.0L Hurricane engine is significantly higher than for the V8 models.
Frequently Asked Questions
Is there a recall for the thermostat on the Jeep Wagoneer?
No, as of early 2026, there is no official safety recall from the NHTSA for the engine coolant thermostat. However, Jeep has acknowledged the issue on 3.0L engines through a Technical Service Bulletin (TSB) and a customer satisfaction campaign.
Can I replace the thermostat myself?
For an experienced DIY mechanic, this is a feasible job. However, it is more involved than on older vehicles. The TSB estimates the job takes about 2.5 to 3.1 hours for a professional. 🎬 See this walkthrough for a helpful thermostat replacement trick You will need to drain some coolant and properly bleed the system of air after installation. 🎬 Watch: How to properly bleed air from your cooling system Given the critical nature of the part, if you are not comfortable with cooling system repairs, professional installation is recommended.
What is a P0128 code?
The P0128 code means "Coolant Temperature Below Thermostat Regulating Temperature." This code is typically set when the engine's computer detects that the engine is not warming up as quickly as expected. The most common cause for this is a thermostat that is stuck in the open position.
Should I replace the thermostat housing at the same time?
Many thermostats for the Wagoneer are sold as an assembly that includes the housing. If your replacement part is the thermostat only, it is wise to inspect the old housing for cracks, warping, or corrosion. If any damage is found, it should be replaced to prevent future leaks.
Helpful Videos
Technical Specifications
OEM Part Numbers: 68672901AA 68361650AH
The correct thermostat is specific to your engine (3.0L I6, 5.7L V8, or 6.4L V8). The 3.0L engine uses a high-flow ball-valve thermostat. Always verify the part number with your vehicle's VIN.
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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