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

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. Fitment: 2003 Toyota 4Runner Limited 2003 Toyota 4Runner Sport 2003 Toyota 4Runner SR5 2004 Toyota 4Runner Limited 2004 Toyota 4Runner Sport 2004 Toyota 4Runner SR5 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 4Runner Limited 2007 Toyota 4Runner Sport 2007 Toyota 4Runner SR5 2007 Toyota FJ Cruiser Base 2007 Toyota FJ Cruiser TRD Special Edition 2007 Toyota Tacoma Base 2007 Toyota Tacoma Pre Runner 2007 Toyota Tacoma X-Runner 2008 Toyota 4Runner Limited 2008 Toyota 4Runner Sport 2008 Toyota 4Runner SR5 2008 Toyota FJ Cruiser Base 2008 Toyota FJ Cruiser Trail Teams Special Edition 2008 Toyota Tacoma Base 2008 Toyota Tacoma Pre Runner 2008 Toyota Tacoma X-Runner 2009 Toyota 4Runner Limited 2009 Toyota 4Runner Sport 2009 Toyota 4Runner SR5 2009 Toyota FJ Cruiser Base 2010 Toyota 4Runner Limited 2010 Toyota 4Runner SR5 2010 Toyota 4Runner Trail 2010 Toyota FJ Cruiser Base 2011 Toyota 4Runner Limited 2011 Toyota 4Runner SR5 2011 Toyota 4Runner Trail 2011 Toyota FJ Cruiser Base 2012 Toyota 4Runner Limited 2012 Toyota 4Runner SR5 2012 Toyota 4Runner Trail 2012 Toyota FJ Cruiser Base 2013 Toyota 4Runner Limited 2013 Toyota 4Runner SR5 2013 Toyota 4Runner Trail 2013 Toyota FJ Cruiser Base 2014 Toyota 4Runner Limited 2014 Toyota 4Runner SR5 2014 Toyota 4Runner Trail 2014 Toyota FJ Cruiser Base 2015 Toyota 4Runner Limited 2015 Toyota 4Runner SR5 2015 Toyota 4Runner Trail 2015 Toyota 4Runner TRD Pro 2016 Toyota 4Runner Limited 2016 Toyota 4Runner SR5 2016 Toyota 4Runner Trail 2016 Toyota 4Runner TRD Pro 2017 Toyota 4Runner Limited 2017 Toyota 4Runner SR5 2017 Toyota 4Runner TRD Off-Road 2017 Toyota 4Runner TRD Pro 2018 Toyota 4Runner Limited 2018 Toyota 4Runner SR5 2018 Toyota 4Runner SR5 Premium 2018 Toyota 4Runner TRD Off-Road 2018 Toyota 4Runner TRD Pro 2019 Toyota 4Runner Limited 2019 Toyota 4Runner SR5 2019 Toyota 4Runner SR5 Premium 2019 Toyota 4Runner TRD Off-Road 2019 Toyota 4Runner TRD Pro 2020 Toyota 4Runner Limited 2020 Toyota 4Runner SR5 2020 Toyota 4Runner SR5 Premium 2020 Toyota 4Runner TRD Off-Road 2020 Toyota 4Runner TRD Pro 2021 Toyota 4Runner Limited 2021 Toyota 4Runner SR5 2021 Toyota 4Runner SR5 Premium 2021 Toyota 4Runner Trail 2021 Toyota 4Runner TRD Off-Road 2021 Toyota 4Runner TRD Pro