{"product_id":"mishimoto-mmts-4run40-03-low-temperature-racing-thermostat-and-housing-for-toyota-4runner-4-0l","title":"Mishimoto MMTS-4RUN40-03 Low-Temperature Racing Thermostat and Housing for Toyota 4Runner 4.0L","description":"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.\nEngine coolant thermostat designed to regulate coolant flow and maintain optimal operating temperature. Ensures efficient warm-up, prevents overheating, and supports reliable performance with a precise fit.\n\u003cul\u003e\n  \u003cli\u003eThe lower activation temperature allows coolant to flow through the engine earlier, which reduces and maintains lower engine temperatures. (71C\/160F compared to the factory thermostat at 82C\/180F)\u003c\/li\u003e\n  \u003cli\u003eIdeal for use in hot climates, on modified vehicles, or in extreme towing\/driving conditions\u003c\/li\u003e\n  \u003cli\u003eStock-style housing includes pre-installed low-temperature thermostat for easy install\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eImprove cooling-system control in your Toyota 4Runner 4.0L with the Mishimoto MMTS-4RUN40-03 Low-Temperature Racing Thermostat and Housing. Designed as a direct-fit replacement for the original thermostat assembly, this stock-style unit supports reliable installation and helps maintain lower engine temperatures in demanding driving conditions. It is compatible with select 2003–2024 Toyota 4Runner 4.0L applications and is also suited to vehicles used in warm climates, under heavy towing loads, or with performance modifications.\u003cbr\u003eThe Mishimoto low-temperature thermostat activates at 160°F, allowing coolant to begin circulating through the engine earlier than the factory thermostat, which typically opens at 180°F. Earlier coolant flow can help reduce and stabilize operating temperatures when the vehicle is working hard. The thermostat is engineered to regulate coolant flow during warm-up and normal operation, supporting efficient engine performance while helping protect against excessive heat.\u003cbr\u003eThe assembly includes a pre-installed thermostat in a stock-style housing for a straightforward replacement process and a proper seal. Its precise fit helps simplify installation while restoring dependable temperature regulation to an aging or defective cooling-system component. Like other Mishimoto Toyota Performance parts, the MMTS-4RUN40-03 is backed by the Mishimoto Lifetime Warranty for lasting confidence.\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cbr\u003e  \u003cli\u003eLower 160°F activation temperature promotes earlier coolant flow than the factory 180°F thermostat\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eHelps reduce and maintain lower engine temperatures during demanding operation\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eIdeal for hot climates, modified vehicles, towing, and extreme driving conditions\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eStock-style housing includes a pre-installed low-temperature thermostat for easier installation\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eDirect-fit replacement for select 2003–2024 Toyota 4Runner 4.0L applications\u003c\/li\u003e\n\u003cbr\u003e  \u003cli\u003eBacked by the Mishimoto Lifetime Warranty\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e160°F low-temperature activation supports earlier coolant circulation and lower operating temperatures\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned for hot climates, modified vehicles, towing, and demanding driving conditions\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eStock-style housing with pre-installed thermostat simplifies installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDirect-fit replacement for select 2003–2024 Toyota 4Runner 4.0L models\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eMishimoto Lifetime Warranty included\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nCompatible With\u003cbr\u003e\n2003 Toyota 4Runner\u003cbr\u003e\n2004 Toyota 4Runner\u003cbr\u003e\n2005 Toyota 4Runner\u003cbr\u003e\n2005 Toyota Tacoma\u003cbr\u003e\n2005 Toyota Tundra\u003cbr\u003e\n2006 Toyota 4Runner\u003cbr\u003e\n2006 Toyota Tacoma\u003cbr\u003e\n2006 Toyota Tundra\u003cbr\u003e\n2007 Toyota 4Runner\u003cbr\u003e\n2007 Toyota FJ Cruiser\u003cbr\u003e\n2007 Toyota Tacoma\u003cbr\u003e\n2007 Toyota Tundra\u003cbr\u003e\n2008 Toyota 4Runner\u003cbr\u003e\n2008 Toyota FJ Cruiser\u003cbr\u003e\n2008 Toyota Tacoma\u003cbr\u003e\n2008 Toyota Tundra\u003cbr\u003e\n2009 Toyota 4Runner\u003cbr\u003e\n2009 Toyota FJ Cruiser\u003cbr\u003e\n2009 Toyota Tacoma\u003cbr\u003e\n2009 Toyota Tundra\u003cbr\u003e\n2010 Toyota 4Runner\u003cbr\u003e\n2010 Toyota FJ Cruiser\u003cbr\u003e\n2010 Toyota Tacoma\u003cbr\u003e\n2010 Toyota Tundra\u003cbr\u003e\n2011 Toyota 4Runner\u003cbr\u003e\n2011 Toyota FJ Cruiser\u003cbr\u003e\n2011 Toyota Tacoma\u003cbr\u003e\n2011 Toyota Tundra\u003cbr\u003e\n2012 Toyota 4Runner\u003cbr\u003e\n2012 Toyota FJ Cruiser\u003cbr\u003e\n2012 Toyota Tacoma\u003cbr\u003e\n2012 Toyota Tundra\u003cbr\u003e\n2013 Toyota 4Runner\u003cbr\u003e\n2013 Toyota FJ Cruiser\u003cbr\u003e\n2013 Toyota Tacoma\u003cbr\u003e\n2013 Toyota Tundra\u003cbr\u003e\n2014 Toyota 4Runner\u003cbr\u003e\n2014 Toyota FJ Cruiser\u003cbr\u003e\n2014 Toyota Tacoma\u003cbr\u003e\n2014 Toyota Tundra\u003cbr\u003e\n2015 Toyota 4Runner\u003cbr\u003e\n2015 Toyota Tacoma\u003cbr\u003e\n2016 Toyota 4Runner\u003cbr\u003e\n2017 Toyota 4Runner\u003cbr\u003e\n2018 Toyota 4Runner\u003cbr\u003e\n2019 Toyota 4Runner\u003cbr\u003e\n2020 Toyota 4Runner\u003cbr\u003e\n2021 Toyota 4Runner\u003cbr\u003e\n2022 Toyota 4Runner\u003cbr\u003e\n2023 Toyota 4Runner\u003cbr\u003e\n2024 Toyota 4Runner","brand":"Mishimoto","offers":[{"title":"Default Title","offer_id":50544388407536,"sku":"MMTS-4RUN40-03","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/6242\/3792\/files\/3b199e6ce05a37c757dfd3ce40c0c09f.jpg?v=1790477666","url":"https:\/\/overlandgear.co\/products\/mishimoto-mmts-4run40-03-low-temperature-racing-thermostat-and-housing-for-toyota-4runner-4-0l","provider":"Overland Gear Co","version":"1.0","type":"link"}