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

A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 2003-2024 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.

Vehicle Fitment

• 2003-2024 Toyota 4Runner
• 2007-2014 Toyota FJ Cruiser
• 2005-2015 Toyota Tacoma
• 2005-2014 Toyota Tundra

⚠ WARNING (California Prop 65): This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Image is for reference only; actual product may vary by application.

Part Number: MMTS-4RUN40-03