Removal & Installation (4-Cylinder)
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 1999 BMW Z3, 1999 BMW M3, 1999 BMW M Roadster, 1999 BMW M Coupe, and 1999 BMW 740iL. However, it is still accessible from the selected car via links, so may be relevant.
Locate idle speed control valve at rear of intake manifold, just below last runner. See Figure. Disconnect idle speed control valve electrical connector. Remove 2 nuts, pull out valve and at the same time disconnect hoses. To install, reverse removal procedure. Ensure new idle speed control valve clicks with ignition on.