Removal & Installation (ES300, GS300, IS300 & RX300)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
Drain cooling system. Disconnect ECT sensor connector. See ENGINE COOLANT TEMPERATURE (ECT) SENSOR LOCATION table. Remove ECT sensor and gasket. To install, reverse removal procedure using NEW gasket. Tighten ECT sensor to specification. See TORQUE SPECIFICATIONS . Fill cooling system.