An engine's thermostat regulates the temperature of the engine by controlling coolant flow, its job is to block the flow of coolant to the radiator until the engine has warmed up.
Symptoms of a bad or failing thermostat: high temperature reading and engine overheating; low temperature reading and underheated engine; temperature changing erratically; coolant leaks around thermostat housing or under vehicle.
NOTE: If the thermostat has a jiggle pin, check valve, or other feature to assist in bleeding air from the system in a vertical installation, the jiggle pin should be located at the north or 12 o'clock location.
Compatible with Toyota Vehicles:
2003-2007 4Runner
1998-2007 Land Cruiser
2001-2007 Sequoia
2000-2006 Tundra
Compatible with Lexus Vehicles:
1998-2000 GS400
2001-2007 GS430
2003-2006 GX470
1997-2000 LS400
2001-2006 LS430
1998-2007 LX470
1998-2000 SC400
2002-2007 SC430
Replaces Part #: 90916-03100, 9091603100, 16346-50010 thermostat with gasket.
NOTE: This is NOT a genuine part, it's a aftermarket replacement part manufactured by Allmotorparts.
NOTE: To ensure accurate fitment, please confirm your vehicle information in the above compatibility section and the description.