Expect part prices to vary by engine and supplier, with aftermarket thermostats typically ranging from about $15 to $70. OEM Mopar units can cost more, roughly $60 to $150. If you hire a shop to install it, labor adds roughly $150 to $350 depending on the engine type and local rates.
Engine variations and part options
The 2018 Dodge Challenger lineup includes multiple engines, but the thermostat itself is a standard cooling component. When shopping, consider the temperature rating and whether you want a simple valve or a kit with gaskets and hoses.
- Aftermarket thermostat (non-OEM): Generally cheaper and widely compatible, often available with standard temperature ratings (e.g., 180F or 195F).
- OEM Mopar thermostat: Official parts from Stellantis/Mopar, typically higher in price but guaranteed to match your engine’s specifications.
- Thermostat kit with gasket and seals: Includes the thermostat plus necessary gaskets, sometimes with a new housing seal for ease of replacement.
- Thermostat with housing included: Some kits or OEM options bundle the thermostat with the housing to simplify installation.
Prices vary by engine and kit contents, so confirm compatibility with your exact 2018 Challenger variant (3.6L V6, 5.7L Hemi, 6.4L, or Hellcat) and check the temperature rating before purchasing.
3.6L Pentastar and 5.7L Hemi considerations
Most engines used in the 2018 Challenger will use a thermostat rated for typical automotive cooling temperatures (often around 180F–195F). The key is to match the rating to what the cooling system requires for optimal performance and avoid overheating or unnecessary cooling delays.
6.4L and high-performance variants
Higher-performance versions (like the 6.4L and Hellcat variants) may have the same basic thermostat design, but some OEMs choose a temperature rating that suits aggressive cooling needs. Always verify the exact part number for your VIN to ensure correct fit and function.
Where to buy and typical price ranges
Several major retailers stock thermostats for the 2018 Challenger, including both aftermarket and OEM options. Shopping around online and in person can help you find the best price and availability.
- Major automotive chain stores (e.g., AutoZone, Advance Auto Parts, O'Reilly): Wide range of aftermarket thermostats and kits, with frequent specials.
- Mopar/OEM dealers and parts websites: Official Mopar thermostats or gasket kits; typically higher price but guaranteed compatibility.
- Online marketplaces (e.g., RockAuto, Amazon): Often the widest range of brands and price points, including OEM and aftermarket options.
- Independent auto parts retailers and regional distributors: May offer competitive prices and kit options.
Note that actual prices fluctuate based on engine variant, included components, and shipping. Always verify the part number and compatibility with your specific Challenger model year and VIN before purchasing.
DIY vs professional replacement
Replacing a thermostat is a doable project for a mechanically inclined DIYer, but it requires common hand tools and careful work to avoid coolant spills or air pockets in the cooling system.
- DIY replacement: Typically cheaper overall (part price plus your time). You’ll need a new thermostat, gasket or seal, coolant, and basic tools. Be prepared to bleed the cooling system after installation to remove trapped air.
- Professional replacement: Ensures proper Bleed/pressure checks and coolant disposal. Labor costs are the main difference, but you gain a warranty and expert diagnostics if there are cooling system issues.
The decision depends on your comfort level with automotive cooling systems and whether you have the tools and space to perform the job safely.
What affects price
- Engine variant and compatibility: 3.6L, 5.7L, 6.4L, or Hellcat versions may have slightly different part numbers.
- Part type and contents: basic thermostat only vs. kit with gaskets, seals, or housing.
- Brand and warranty: aftermarket brands are typically cheaper; OEM/Mopar parts come with an official warranty and exact fit.
- Where you shop: price differences between dealer, chain retailers, and online marketplaces.
- Shipping and availability: longer shipping times can affect total cost, especially for OEM parts from distant suppliers.
To get the exact price, check current listings for your Challenger’s engine type and confirm the correct part number for your VIN.
Summary
For a 2018 Dodge Challenger, thermostat prices span a broad range depending on engine type, whether you choose aftermarket or OEM, and whether you buy a simple valve or a full kit. Expect part prices roughly from $15 to $70 for aftermarket units and $60 to $150 for OEM Mopar parts. Labor costs, if you hire a shop, add roughly $150 to $350 depending on engine and local rates. Always verify compatibility with your specific vehicle and consider whether you’ll DIY or prefer professional installation for peace of mind and proper cooling system bleeding.
How much does it cost to replace a thermostat in a Dodge Challenger?
The average cost for a Dodge Challenger Thermostat Replacement is between $468 and $525. Labor costs are estimated between $122 and $179 while parts are typically priced around $346. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
How much is a 2018 Dodge Challenger RT worth?
2018 Dodge Challenger Pricing
| Original MSRP | KBB Fair Purchase Price (national avg.) | |
|---|---|---|
| R/T Coupe 2D | $37,180 | $20,500 |
| R/T Plus Coupe 2D | $39,985 | $22,100 |
| T/A Coupe 2D | $40,385 | $21,500 |
| R/T Shaker Coupe 2D | $41,480 | $23,300 |
How do I know if my Dodge Challenger thermostat is bad?
Signs of a Bad Engine Thermostat:
- Temperature Fluctuations: One of the most common signs of a bad thermostat is erratic temperature readings on your dashboard gauge.
- Engine Overheating: An engine running hotter than usual is a red flag.
- Poor Fuel Efficiency: A faulty thermostat can lead to inefficient fuel usage.
What are the common challenger problems?
Its 2.4-liter and 3.6-liter engine variants have had numerous issues over the years. Common problems include premature brake wear, poor internal electronics, and recurring coolant leaks. Transmission issues are widespread, particularly in models with the 4-speed automatic.