Material: The thermostat shell is made of aluminum, which is lightweight, not easy to deform, and is durable。 Installation steps: Directly replace the damaged car thermostat housing assembly to improve driving safety performance。 Engine Coolant Thermostat 90916-03136 For Lexus 9091603136-A91R Features: Ensures optimal engine temperature control and efficiency keeping your vehicle running smoothly and efficiently. Function: This automotive thermostat housing assembly effectively controls engine temperature preventing overheating and helping maintain a stable operating temperature.