Works on: 1998-2002 Ford Crown Victoria, 2000-2005 Ford Excursion, 1999-2002 Ford Expedition, some 1997-1998 Ford Expedition, 1998-2000 Ford Explorer, 1998-2003 Ford F150 F250 F350, 2005-2006 Ford GT, 1997-2004 Ford Mustang, 1999-2000 Ford Ranger, some 1997-1999 Ford Taurus, 1998.5-2000 Ford Windstar. This is a transponder key (chipkey.) If you have two working keys you can program this key yourself. If not, an automotive locksmith will need to program your vehicle to accept the new key. Any locksmith can cut the key to match your existing key. If you have two working keys, use the included easy instructions to program your car to accept the new key so it will start the engine. Free phone tech support included as needed.