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 deg C/160 deg F) compared to the factory thermostat (82 deg C/180 deg F). The lower activation temperature allows coolant to flow through the engine earlier, which yields 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.
• Stock-style housing includes pre-installed low-temperature thermostat for easy install
• The lower activation temperature allows coolant to flow through the engine earlier, which yields and maintains lower engine temperatures (71 deg C/160 deg F compared to the factory thermostat at 82 deg C/180 deg F)
OEM Activation Temperature C/F: 82 deg C/180 deg F
Mishimoto Activation Temperature F/C: 160 deg F/71 deg C
Suitable For Use With: For Toyota 4Runner 4.0L 2003+
Includes: (1) Mishimoto Low-Temp Thermostat, (1) Thermostat Housing without O-Ring
Suitable For Use With: For Hot Climates, On Modified Vehicles, or in Extreme Towing/Driving Conditions