Mishimoto 2003+ Toyota 4Runner 4.0L Low-Temperature Racing Thermostat - MMTS-4RUN40-03Find parts that fit my vehicle

Mishimoto 2003+ Toyota 4Runner 4.0L Low-Temperature Racing Thermostat - MMTS-4RUN40-03

• Direct-fit replacement for aged stock unit
• Lower activation temperature (71°C/160°F) compared to factory thermostat (82°C/180°F)
• Reduces and maintains lower engine temperatures
• Ideal for warmer climates, high-performance vehicles, and extreme towing/driving conditions
• Stock-style housing for proper seal and easy installation
• Includes Mishimoto Lifetime Warranty

A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 2003+ Toyota 4Runner 4.0L cooling system with a Mishimoto Low-Temperature Racing Thermostat and housing! This thermostat is designed as a direct-fit replacement for your aged stock unit. The Mishimoto thermostat has a lower activation temperature (71°C/160°F) compared to the factory thermostat (82°C/180°F). The lower activation temperature allows coolant to flow through the engine earlier, which reduces and maintains lower engine temperatures. This thermostat is ideal for use in warmer climates, on vehicles making more power than stock, or under extreme towing/driving conditions. The stock-style housing will provide a proper seal and installs easily. Like all our Toyota Performance parts, this thermostat and housing includes the Mishimoto Lifetime Warranty.

Cooling products are essential components to keeping your vehicle running at optimal temperatures. Whether you are looking for a radiator, fans, or oil coolers, we've got you covered with the top brands like Mishimoto, Koyorad, Skunk2, Moroso, and more!

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About Mishimoto

Mishimoto, the world leader in performance cooling products, was created for automotive enthusiasts by automotive enthusiasts. Established in 2005, we have more than a decade of experience in working toward our goal of providing superior cooling system upgrades for sport compact, modern muscle, European performance, classics, Jeeps, and trucks.

Vehicle Fitment

• 2003 Toyota 4Runner Limited
• 2003 Toyota 4Runner SR5
• 2004 Toyota 4Runner Limited
• 2004 Toyota 4Runner SR5
• 2004 Toyota 4Runner Sport
• 2005 Toyota 4Runner Limited
• 2005 Toyota 4Runner Sport
• 2005 Toyota 4Runner SR5
• 2005 Toyota Tacoma Base
• 2005 Toyota Tacoma Pre Runner
• 2005 Toyota Tacoma X-Runner
• 2006 Toyota 4Runner Limited
• 2006 Toyota 4Runner Sport
• 2006 Toyota 4Runner SR5
• 2006 Toyota Tacoma Base
• 2006 Toyota Tacoma Pre Runner
• 2006 Toyota Tacoma X-Runner
• 2007 Toyota FJ Cruiser Base
• 2007 Toyota 4Runner Limited
• 2007 Toyota 4Runner Sport
• 2007 Toyota 4Runner SR5
• 2007 Toyota Tacoma Base
• 2007 Toyota Tacoma Pre Runner
• 2007 Toyota Tacoma X-Runner
• 2007 Toyota FJ Cruiser TRD Special Edition
• 2008 Toyota 4Runner SR5
• 2008 Toyota 4Runner Sport
• 2008 Toyota 4Runner Limited
• 2008 Toyota Tacoma X-Runner
• 2008 Toyota Tacoma Pre Runner
• 2008 Toyota Tacoma Base
• 2008 Toyota FJ Cruiser Base
• 2008 Toyota FJ Cruiser Trail Teams Special Edition
• 2009 Toyota FJ Cruiser Base
• 2009 Toyota 4Runner SR5
• 2009 Toyota 4Runner Sport

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov