Engine replacement thermostat: The thermostat of the engine regulates the temperature of the engine by controlling the flow of coolant. Symptoms of a poor or failed thermostat: high temperature readings and engine overheating, low temperature readings and engine overheating, abnormal temperature changes, coolant leakage around the thermostat housing or under the vehicle. You can find the thermostat of the car by starting from the upper radiator hose, and then follow it to the top of the engine.Compatible with for vehicles: 1995-2004 | 1994-2006, 2010-2017 | 2000-2005 Celica | 2000-2009, 2014-2019 Corolla | 2000-2005 | 2001 2019 Highlander | 2003-2009 | 2000-2005 MR2 Spyder | 2001-2005, 2009-2018 | 1998-2006, 2011- Sienna | 1999-2000 Sienna | 1999-2008 | 1993-1998 | 2009-2015 Venza | 1993 -1998 thermostat.Replacement part numbers: 90916-A3003, 90916A3003, 90916-03129, 9091603129 thermostat. Thermostats are compatible with: 1994-2003 ES300 | 2004-2006 ES330 | 1993-2005 GS300 | 2001-2005 IS300 | 1990-1997 LS400 | 19999-20 03 RX3 00 | 2004-2006 RX330 | 2006-2008 RX400h | 1992-2000 SC300 | 1992-1997 SC400 | 2005-2006, 2011-2016 tC | 20004-2006 xB | 2004-2006 | 2008-2010 xD.Function: , high-quality style, meet or exceed the performance of all old equipment replacement thermostats. Made of high-quality materials, durable. The high quality design can fit the thermostat properly and fix the thermostat in the outlet casting, so as to obtain better performance. Slot structure stainless steel spring frame, increase strength and durability.colour:SilverMaterial:metalPackage Contents:1 x ThermostatOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.