Where is 2008 Lexus RX350 thermostat?

The thermostat in a 2008 Lexus RX350 is located on the engine, typically near the engine block where the upper radiator hose connects. To access it, you often need to remove the upper radiator hose and the thermostat housing. It's advisable to consult a repair manual or a professional for detailed instructions, as working on the cooling system can be complex.