Works on: some 2005-2007 Saturn Relay. Only some rare models use this key. Make sure your old key has the same head, the grooves are on the same side, and it says PK3. This is a transponder key (chipkey.) Any locksmith can cut the key to match your existing key. Then 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. Product Features Replace your lost key. Chip Tested. OEM Factory Original Product.