Mishimoto Thermostat for Toyota 4Runner 4.0L Low-Temperature 71°C Activation

Mishimoto Thermostat for Toyota 4Runner 4.0L — Low-Temperature 71°C Activation Upgrade your 2003–2024 Toyota 4Runner 4.0L cooling system with the Mishimoto Low-Temperature Racing Thermostat . Designed as a direct-fit replacement, this thermostat reduces engine operating temperatures by opening at 71°C (160°F) versus the factory 82°C (180°F) unit. Lower activation temp: Opens at 71°C/160°F to circulate coolant earlier and maintain cooler running temps. Direct-fit housing: Stock-style housing ensures a proper seal and straightforward installation. Improved reliability: Helps prevent overheating and reduces thermal stress on internal components. Ideal applications: Warmer climates, modified engines making increased power, heavy towing, track use, and extreme driving conditions. Warranty: Backed by the Mishimoto Lifetime Warranty for long-term confidence. Swap the aging stock thermostat for Mishimoto's precision-engineered unit to achieve more consistent cooling, improved performance under load, and added peace of mind on every drive.