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.

This Part Fits:

Year	Make	Model	Submodel
2003-2021	Toyota	4Runner	Limited
2020-2021	Toyota	4Runner	Nightshade
2003-2009	Toyota	4Runner	Sport
2003-2021	Toyota	4Runner	SR5
2018-2021	Toyota	4Runner	SR5 Premium
2010-2016,2021	Toyota	4Runner	Trail
2017-2021	Toyota	4Runner	TRD Off-Road
2018-2021	Toyota	4Runner	TRD Off-Road Premium
2015-2021	Toyota	4Runner	TRD Pro
2020-2021	Toyota	4Runner	Venture
2007-2014	Toyota	FJ Cruiser	Base
2008	Toyota	FJ Cruiser	Trail Teams Special Edition
2007	Toyota	FJ Cruiser	TRD Special Edition
2005-2008	Toyota	Tacoma	Base
2005-2008	Toyota	Tacoma	Pre Runner
2005-2008	Toyota	Tacoma	X-Runner