How do you change the Idle Air Control valve on a 1992 Mazda Miata?

To change the Idle Air Control (IAC) valve on a 1992 Mazda Miata, first disconnect the negative battery cable to ensure safety. Locate the IAC valve on the throttle body, then remove the electrical connector and the two bolts securing the valve in place. Take out the old valve, clean the mounting surface, and install the new valve by reversing the removal process, ensuring a secure fit. Finally, reconnect the battery and start the engine to check for proper operation.