Removal (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.
Disconnect negative battery cable. Remove No. 1 Intake Air Control (IAC) valve. See THROTTLE BODY under FUEL SYSTEM. Disconnect vacuum hose from No. 2 IAC valve located on end of air intake chamber. See Figure. Disconnect ground strap and ground cable from IAC valve. Remove remaining IAC valve retaining nuts. Remove IAC valve by prying between air intake chamber and IAC valve. Remove gasket.