How do you replace expansion valve on 2002 Mitsubishi Galant?

To replace the expansion valve on a 2002 Mitsubishi Galant, first, ensure the AC system is fully discharged to avoid refrigerant release. Remove the dashboard panel and the evaporator case cover to access the valve. Disconnect the refrigerant lines and the electrical connector from the old expansion valve, then remove it from the evaporator. Install the new valve, reconnect the lines, and reassemble the dashboard before recharging the AC system.