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Replacing a thermostat on your Dodge Durango matters because the thermostat controls engine warm-up, fuel efficiency, and cabin heating. A stuck or incorrect thermostat can cause overheating, poor heater performance, or extended warm-up times, which affect drivability and long-term engine health. This guide highlights seven shortlisted thermostats that fit Dodge Durango models and explains the key factors we considered, including fitment accuracy and thermal response. Read on to understand which attributes matter most when choosing a replacement and what to check before installation.
Looking for other parts? See all Dodge Durango parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | RARAYC Aluminum Engine Coolant Thermostat Housing Assembly |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman Engine Coolant Thermostat Housing Assembly (902-852) |  |
| Best Quality Built to a higher standard if you want something more solid | Allmotorparts Thermostat Housing Assembly for Dodge 3.6L V6 |  |
| Best Budget The cheapest option that still gets the job done reliably | Techie 7420-195 Engine Coolant Thermostat (195°F) |  |
| Most Sold A high-volume bestseller chosen again and again | MITZONE Aluminum Thermostat Housing Assembly with Thermostat and Gasket |  |
| Best Value for Money The sweet spot between price and what you get | A-Premium Engine Coolant Thermostat with Seal (fits Dodge Durango and select Chrysler/Jeep/Ram models) |  |
| Best Overall The best all-around choice for most situations | Mishimoto Racing Thermostat MMTS-JED-06L for Dodge HEMI 2006–2019 |  |
1. RARAYC Aluminum Engine Coolant Thermostat Housing Assembly
| Brand | RARAYC |
|---|---|
| Model | Aluminu Engine Coolant Thermostat Housing |
| Exterior | Machined |
| Replaces Part Numbers | 5184570AH, 68136754AA, 5184570AJ, 902-3036 |
This aluminum thermostat housing assembly replaces the factory housing on compatible Chrysler and Dodge engines and provides the coolant outlet, thermostat seat, and mounting points needed to restore a vehicle's cooling circuit. It is typically used during thermostat or housing failures and during cooling-system repairs where the plastic original has cracked or leaked. The machined aluminum construction promises better corrosion resistance and durability versus plastic housings, and several buyers report straightforward installation and good fitment. The part lists multiple OEM replacement numbers and comes with a machined finish that should resist warping under heat. Some users praised the longevity potential and leak-free performance, though a minority reported quality-control issues with the gasket and a misaligned internal check valve that required replacement parts or careful inspection during install. Installers should verify gasket condition and bleed the cooling system thoroughly after fitting. This is a practical upgrade for those replacing aging plastic components, but expect to check sealing surfaces and hoses during installation to avoid post-install air or leak issues.
Best for: Reliability-focused owners who prioritize replacing fragile plastic cooling components with a more durable metal housing to reduce future failures and maintenance visits.
Less Ideal for: Buyers who prefer parts with guaranteed perfect factory-fit tolerances out of the box or those unwilling to inspect and possibly replace the supplied gasket before installation should consider other factory-quality alternatives.
- Machined 1060-H32 aluminum construction for improved corrosion resistance over plastic housings
- Lists multiple factory replacement part numbers for easier cross-reference during installation
- Many buyers report straightforward installation and correct fitment for compatible vehicles
- Some reports of inconsistent gasket quality requiring a replacement gasket
- A few units showed a misaligned or poorly installed check/bleed valve that affected air bleeding
- Casting finish varies and may require light cleaning or dressing before installation
Verdict A durable aluminum replacement housing that is a smart reliability upgrade over plastic originals provided you inspect the gasket and bleed path during installation.
2. Dorman Engine Coolant Thermostat Housing Assembly (902-852)
| Manufacturer | Dorman Products |
|---|---|
| Model | 902-852 |
| Compatible vehicles | Select Dodge Durango and Jeep models (see fitment) |
This Dorman thermostat housing assembly replaces the original water outlet and thermostat on specified Dodge Durango and Jeep models. It installs in place of the factory unit and is intended to withstand wide temperature swings to reduce the chance of cracks or leaks. Typical use is a direct repair when the stock housing or thermostat fails, or to clear cold-running codes like P0128. The unit ships with a preinstalled gasket and is shaped for a direct fit to the engine mounting surface, which speeds DIY swaps and reduces bench time for mechanics. Users report straightforward installation and restored operating temperature and cabin heat. Limitations to note are occasional reports of fit or function problems on some model years, so confirming vehicle fitment before purchase is important, and some buyers prefer factory-brand parts to avoid potential issues. Expect to top up coolant after installation and verify thermostat operation during a warm-up cycle.
Best for: Owners and DIYers who value convenience and quick repairs and want a ready-to-install replacement that minimizes shop time and effort.
Less Ideal for: Buyers who prioritize strict OEM parts compliance or who prefer dealer-sourced components for warranty or long-term assurance should consider factory replacements instead.
- Factory-style fit intended for direct replacement on listed Dodge and Jeep years
- Designed to resist cracking and leaking across temperature changes
- Preinstalled gasket and familiar housing shape speed installation and reduce labor time
- Widely used part with many user reports confirming it clears low-temperature codes and restores cabin heat
- Some users report compatibility or functional failures on particular model years requiring returns or professional diagnosis
- Not a factory-brand part so long-term durability can vary compared with OEM replacements
Verdict A convenient, direct-fit aftermarket thermostat housing assembly that restores proper operating temperature quickly, but double-check fitment if you require strict factory-brand assurance.
3. Allmotorparts Thermostat Housing Assembly for Dodge 3.6L V6
| Compatible Engines | Dodge 3.6L V6 |
|---|---|
| Fitment Years | 2016–2022 Durango |
| Replaces Part Number | 902-3113 |
| Brand | Allmotorparts |
This Allmotorparts thermostat housing assembly replaces the factory housing and integrated thermostat on Dodge 3.6L V6 engines. It mounts where the engine meets the radiator and controls coolant flow as the engine warms and cools, so it is typically used to repair leaks, clear P0128 or P0125 codes, or fix a stuck thermostat that causes overheating or poor warm-up. The part is sold as a complete housing assembly that installs in place of the original, with an O-ring style seal and the same three-bolt mounting arrangement described in the fitment notes, so installation is straightforward for a technician or a competent DIYer. The practical benefits are a factory-like fit, immediate replacement of a leaking housing, and elimination of thermostat-related cooling faults. Limitations are that this is an aftermarket replacement rather than a genuine factory part and longevity can vary with operating conditions, so some owners may prefer an OEM-sourced unit for long-term assurance.
Best for: Performance-oriented owners who prioritize restoring reliable engine temperature control and expect a close-to-factory fit when replacing a failed thermostat housing on a Dodge Durango.
Less Ideal for: Buyers seeking only factory-branded parts or those who want extended manufacturer-backed warranties should consider sourcing a factory-quality replacement instead.
- Direct-fit replacement designed for Dodge 3.6L V6 engines to restore cooling control
- Ships as a complete housing assembly including seal for quick installation
- Multiple customer reports of exact fit and straightforward installation on Durango models
- Replaces part number 902-3113 so it matches the common factory fitment pattern
- Aftermarket unit rather than a genuine factory part which may lead some owners to question long-term durability
- Manufacturer warranty details are not listed in the product information
Verdict A practical aftermarket replacement that delivers factory-style fit and straightforward installation for Dodge 3.6L Durango owners needing to restore proper cooling control.
4. Techie 7420-195 Engine Coolant Thermostat (195°F)
| Opening temperature | 91°C (195°F) |
|---|
This Techie thermostat is a simple, budget-focused replacement part designed to restore correct coolant flow and engine warm-up behavior on compatible Dodge Durango vehicles. It is a drop-in style thermostat with a 195°F (91°C) opening temperature, so it behaves like a factory-spec thermostat for systems that require that temperature. Typical use is a routine cooling-system repair or heater fix—swap the old thermostat during a coolant service or when overheating or slow warm-up symptoms appear. The product is machined and marketed as a direct-fit for the listed model years, which reduces installation time for a standard DIY or mechanic installation. Buyers should note this is an aftermarket, economy option: it does not include a gasket or housing and long-term durability versus higher-end name-brand units is not documented. For owners who need a low-cost, correct-temperature replacement that installs like the original, it provides a practical, no-frills solution; those wanting extended corrosion protection or a premium warranty may prefer an upgraded unit.
Best for: Budget-conscious owners who prioritize low replacement cost and a straightforward part that restores normal operating temperature and heater function on a Dodge Durango.
Less Ideal for: Buyers seeking long-term corrosion resistance, extended warranties, or premium OEM-equivalent materials should consider higher-end thermostats or factory-quality replacements.
- Direct-fit design for compatible vehicles simplifies installation
- Opens at 195°F (91°C) matching common factory temperature for affected engines
- Machined exterior suggests consistent manufacturing and fit
- Low-cost option suitable for routine maintenance or emergency replacement
- Aftermarket economy unit with limited published durability data compared with premium brands
- Package may not include housing or gasket so additional parts could be required
Verdict A wallet-friendly, direct-fit thermostat that restores proper operating temperature on compatible Dodge Durango models but skips premium durability features.
5. MITZONE Aluminum Thermostat Housing Assembly with Thermostat and Gasket
| Model | 001-504ALU |
|---|---|
| Manufacturer | MITZONE |
| OEM Part Number | 5184651AF, 5184651AG, 5184651AH, 902-852 |
| Position | Inside |
This MITZONE aluminum thermostat housing assembly replaces the stock plastic coolant outlet on compatible Dodge Durango models and ships with a thermostat, gasket, and a mounting screw. It is typically used as a direct replacement when the original housing cracks, leaks, or the thermostat fails. The cast-aluminum construction gives a more durable mating surface than plastic and several buyers report straightforward, bolt-on installation with no modifications required. Included hardware and gasket mean you can complete the swap with basic hand tools and a clean mating surface. In practice the unit holds temperature near factory levels and reduces the risk of repeated plastic-housing failures. Some users noted a slightly different outlet angle that was accommodated by the factory radiator hose, and a small number of reviews report thermostat operation issues, so inspect the thermostat and bleed the cooling system during installation. For a risk-averse Durango owner wanting a longer-lasting replacement, this is a sensible factory-replacement style upgrade.
Best for: A risk-averse mainstream Durango owner wanting a durable, factory-replacement style upgrade to avoid repeat plastic-housing failures and prefer a ready-to-install kit.
Less Ideal for: Owners who need a performance thermostat with different calibrated opening temperatures or those who prefer dealer-sourced factory parts for warranty continuity.
- Cast aluminum housing is stronger and more heat-resistant than stock plastic outlets
- Includes thermostat, gasket, and a mounting screw so fewer additional parts are needed
- Many users report direct fitment and easy bolt-on installation for Durango
- Holds operating temperature near factory levels according to multiple reports
- A few reviews report thermostat sticking or failure which could cause overheating
- Outlet tube angle can differ slightly from factory which may require hose adjustment
Verdict A durable aluminum replacement kit that reduces the risk of repeat plastic housing failures and installs as a near-direct swap on compatible Dodge Durango models.
6. A-Premium Engine Coolant Thermostat with Seal (fits Dodge Durango and select Chrysler/Jeep/Ram models)
| Start to Open Temperature (℃) | 95 |
|---|---|
| Package Quantity | 1 |
| Voltage | 12 Volts (DC) |
This A-Premium thermostat replaces a factory thermostat and seal to control coolant flow and keep the engine operating in its intended temperature range. It installs in place of the original thermostat housing and is commonly used during routine cooling-system repairs or when a stuck thermostat causes overheating or poor warm-up. The unit lists a 95°C start-to-open temperature and comes boxed with one thermostat. Construction is described as tested for hardness and crush resistance to maintain consistent valve action, which helps the cooling system stabilize under load and highway driving. Fitment covers many Chrysler, Jeep and Dodge vehicles including Dodge Durango model years listed in the product description, so it works as a direct factory-quality replacement when the correct reference number is matched. Limitations: this is an aftermarket replacement so finish and fit can vary slightly versus factory parts and buyers should verify the reference numbers match their engine before installation.
Best for: Practical owners who prioritize a reliable, cost-effective replacement to restore proper cooling performance on a Dodge Durango without overspending on dealer parts.
Less Ideal for: Enthusiasts seeking performance-grade thermostats with nonstandard temperature ratings or restorers who require exact factory cosmetics should consider alternative options.
- Designed as a direct replacement with included seal for straightforward swap during cooling-system repairs
- Start-to-open temperature specified at 95°C for predictable thermostat opening behavior
- Packaged as a single unit for simple inventory and installation
- Manufacturer states parts undergo hardness and crush tests to ensure consistent valve operation
- Aftermarket part so cosmetic finish and exact fit may differ from factory parts
- Only one temperature rating is provided which may limit choice for specific tuning or performance cooling setups
Verdict A budget-friendly, function-focused replacement thermostat that restores cooling control for compatible Dodge Durango models when you need a practical, no-frills fix.
7. Mishimoto Racing Thermostat MMTS-JED-06L for Dodge HEMI 2006–2019
| Compatibility | Dodge Charger, Challenger, Durango HEMI 2006–2019 (5.7L, 6.1L, 6.4L) |
|---|---|
| Opening Temperature | 180°F (82°C) |
| Included Components | Racing Thermostat, rubber gasket when applicable |
The Mishimoto MMTS-JED-06L is a direct-fit racing thermostat engineered for 5.7L, 6.1L, and 6.4L HEMI engines in Dodge Charger, Challenger, and Durango applications from 2006–2019. It opens at 180°F (82°C) versus the factory 203°F (95°C), allowing coolant to circulate earlier so cruising and sustained high-speed temperatures run noticeably lower and more consistent. Installation is straightforward since it is designed to replace the stock unit without modifications and it ships with the necessary gasket when applicable. In practice this helps protect the engine under heavy loads or towing and can reduce thermal stress on tuned or forced-induction setups, though many users pair it with a fan or tune adjustments so the vehicle’s cooling strategy matches the lower activation point. Some owners report long-term durability is mixed, so expect to monitor performance and use the manufacturer’s support if problems arise. This thermostat is best when you want consistent, lower operating temps without major system changes but are prepared to adjust fan or tune settings for optimal behavior.
Best for: Balanced, all-round buyers who want a reliable, hands-on cooling upgrade to lower and stabilize operating temperatures for everyday driving, towing, and occasional spirited use.
Less Ideal for: Drivers who prefer strictly stock thermal behavior or who do not want to adjust fan settings or engine calibration after installation should consider staying with factory-spec components.
- Direct-fit for 5.7L, 6.1L, and 6.4L HEMI Dodge vehicles so no housing mods are required
- Opens at a lower 180°F (82°C) to reduce and stabilize engine coolant temperatures during cruising and high-load driving
- Ships with rubber gasket when applicable for proper sealing and straightforward installation
- Precisely calibrated for performance applications including cammed or forced-induction setups
- Lower activation can require adjusting fan control or engine tune to prevent errant codes or fan timing mismatches
- Some users report variable long-term durability compared with stock thermostats
Verdict A practical, direct-fit thermostat that lowers and stabilizes HEMI coolant temps for better performance, provided you tune fan or engine settings to match the lower activation point.
Choosing the Right Dodge Durango Thermostat: Key Factors to Consider
Correct Fitment and Part Number
Accurate fitment ensures the thermostat seats and seals properly in the Durango's housing and interacts correctly with the coolant passages. Using a unit matched to the vehicle's part number reduces the risk of leaks and improper operation.
Check stamped or listed part numbers and compare housing flange dimensions and thermowell design where possible. Mismatched fitment can lead to poor sealing, vibration issues, or the need for housing modifications, so prioritize units that explicitly state compatibility with your Dodge Durango year and engine.
Opening Temperature and Thermal Response
The thermostat opening temperature determines when coolant begins circulating through the radiator, affecting warm-up time, emissions, and heater performance. A thermostat that opens too early can make the engine run cold, while one that opens too late risks overheating.
Look for thermostats that specify the temperature at which they open and the tolerance range. Faster and more predictable thermal response reduces engine temperature swings during city driving and under load, which is important for consistent operation in a heavier vehicle like the Durango.
Build Quality and Materials
Material choices influence longevity and resistance to corrosion from coolant additives and road salts. Brass or stainless internal components and a robust thermostat frame help prevent sticking or valve distortion over time.
A sturdier build also stands up better to repeated thermal cycles and towing demands. Consider thermostats with durable springs and reliable sealing surfaces to minimize failures caused by fatigue or electrochemical corrosion.
Sealing Method and Housing Interface
How the thermostat seals to the housing affects the likelihood of coolant leaks. Units that integrate a reliable gasket surface or include a high-quality seal reduce the chance of a thermostat housing seal leak and simplify installation.
Inspect whether the thermostat requires a separate O-ring or gasket and whether the housing mating surface is compatible. A solid sealing method helps prevent coolant loss and air intrusion into the cooling system, which can cause hot spots and erratic temperature readings.
Compatibility With Cooling System Accessories
Some thermostats are designed to work with specific bypass passages, heater circuits, or housing-mounted sensors. Ensuring compatibility avoids the need to modify hoses or sensors and preserves accurate temperature readings.
Confirm that the thermostat accommodates any built-in bypass ports and that its design does not impede heater core flow. Proper compatibility maintains heater performance and engine temperature stability during different driving conditions.
Durability Under Load and Maintenance Considerations
Thermostats in SUVs often face higher thermal stress during towing or sustained highway speeds. Choose units rated for repeated thermal cycling and consider the expected maintenance interval for the cooling system.
Also account for ease of access and whether replacement requires removing other components. A thermostat that lasts longer and is straightforward to service reduces total downtime and the chance of roadside failures.
FAQ
What are common signs of a bad thermostat in a Dodge Durango?
Common signs include the engine overheating, the temperature gauge running higher than normal, or the engine taking a long time to reach operating temperature. You may also notice poor heater performance in the cabin or frequent coolant level drops if the thermostat contributes to sealing issues. These symptoms often indicate the thermostat is stuck closed, stuck open, or the housing seal is compromised.
How do you test a thermostat without removing it?
You can monitor temperature behavior with the engine cold and then warmed up to see if the temperature rises steadily toward normal operating range. A diagnostic infrared thermometer or an OBD2 live temperature reading helps. If the engine runs cold for a long time or overheats quickly after warm-up, the thermostat may be malfunctioning. For definitive testing, bench-testing after removal is more accurate.
Can a thermostat housing seal leak cause overheating?
Yes, a leaking thermostat housing seal can allow coolant to escape or air to enter the cooling system, both of which can reduce cooling efficiency and lead to hot spots. Small leaks might first show as low coolant levels or visible seepage, and if unaddressed, they can contribute to overheating under load.
How does a thermostat affect engine running cold or poor heater output?
If a thermostat is stuck open or opens at too low a temperature, the engine may fail to reach normal operating temperature, which leads to reduced cabin heat and decreased fuel efficiency. A correctly functioning thermostat retains heat during warm-up, ensuring the heater core receives hot coolant and the engine operates at optimal temperature.
What should I know about replacing a Dodge Durango thermostat?
When replacing the thermostat, confirm the replacement matches the vehicle-specific part number and opening temperature. Inspect and, if necessary, replace the housing gasket or O-ring to prevent leaks. Also bleed the cooling system after installation to remove air pockets that can cause temperature fluctuations.
How often should a thermostat be inspected or replaced?
Thermostats do not have a fixed lifespan but are commonly inspected when performing major coolant service or if signs of failure appear. Regular coolant maintenance and visual checks of the housing and hoses during service can reveal early issues. Consider replacement if the thermostat shows signs of sticking, corrosion, or if the housing seal is degraded.
How We Chose the Best Dodge Durango Thermostat
We evaluated candidate thermostats using several vehicle-focused criteria to ensure reliable operation in Dodge Durango applications. Primary filters included correct OEM-equivalent fitment and part number compatibility, verified opening temperature that matches factory specifications, and construction quality such as valve design and corrosion-resistant materials. We also considered housing interface design and sealing methods to reduce the risk of coolant leaks, plus overall durability under typical highway and towing loads. We excluded items without clear fitment data for Dodge Durango or products lacking stated opening-temperature specs. Units intended only for racing or modified engines with nonstandard cooling setups were not considered. The result is a list of seven options that meet practical fitment, thermal performance, and build-quality thresholds for normal on-road use.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Dodge Durango thermostat, prioritize correct fitment and the specified opening temperature to maintain proper engine warm-up and cooling. Balance build quality and sealing method to reduce the likelihood of leaks and repeated failures. Keep in mind that some tradeoffs exist between quick thermal response and longevity under heavy use. Focus on units that match the vehicle's part number, specify thermal characteristics, and use durable materials to ensure reliable operation.
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