Application:
2003-2009 4Runner
1998-2007 Land Cruiser
2001-2009 Sequoia
2000-2006 Tundra

1998-2000 Lexus GS400
2001-2006 Lexus GS430
2003-2006 Lexus GX470
1997-2000 Lexus LS400
2001-2006 Lexus LS430
1998-2007 Lexus LX470
1998-2000 Lexus SC400
2002-2006 Lexus SC430

Replaces part number:
90916-03100, 9091603100, 16346-50010

Function:
Adjust the coolant temperature to save energy,Fix the check engine light issue and no engine hiccups problem and engine overheating or over-cooling problem
Control the flow of coolant through the radiator to enable the engine to reach and maintain its normal operating temperature

Notes:
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
The studs for the house can back out if there is a frozen nut on it