Mishimoto MMTS-4RUN40-03 Racing Thermostat Compatible With Toyota 4Runner 2003+

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.

Direct fit for 2003+ Toyota 4Runner 4.0L 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 reduces and maintains lower engine temperatures. (71°C/160°F compared to the factory thermostat at 82°C/180°F) Ideal for use in hot climates, on modified vehicles, or in extreme towing/driving conditions Mishimoto Lifetime Warranty Fits Select: 2007 TOYOTA TACOMA 6 Cyl 4 L 2005-2006 TOYOTA TACOMA ACCESS CAB 2008 TOYOTA TACOMA DOUBLE CAB LONG BED 2003-2010 TOYOTA 4RUNNER SR5/SPORT 2016 TOYOTA 4RUNNER SR5/LIMITED/SR5 PREMIUM 2007-2014 TOYOTA FJ CRUISER 2011-2013 TOYOTA 4RUNNER SR5/LIMITED/TRAIL 2019 TOYOTA 4RUNNER SR5/LIMITED/LIMITED NIGHT SHADE/TRD OFF ROAD/TRD OFF ROAD PREMIUM/TRD PRO 2014-2015 TOYOTA 4RUNNER SR5/LIMITED 2017-2018 TOYOTA 4RUNNER SR5/SR5 PREMIUM/LIMITED/TRD OFFROAD/TRD OFFROAD PRM/TRD PRO 2021 TOYOTA 4RUNNER SR5/SR5 PREMIUM/VENTURE/LIMITED/TRAIL/NIGHT SHADE/TRDOR/TRDORPREM/TRDPRO 2020 TOYOTA 4RUNNER SR5/SR5 PREMIUM/VENTURE/LIMITED/NIGHT SHADE/TRDOR/TRDORPREM/TRDPRO and more - add your vehicle to our fit widget to check