Vacuum Closes Bypass Heater Valve. Heater Valve. 2002 Ford Explorer Sport w/ 4-Port Valve;. 2003 Ford Explorer Sport w/ 4-Port Valve;. Type: Heater Valves. Notes: w/ 4-Port Valve. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.
