1998-1999 Lexus ES 300

ECM Reflashing (ES300 1998-1999)
If you’ve lost all working master keys to your car, you cannot program additional keys by the on-board programming method. A working master key is needed to open the programming mode. You must have the Engine Control Module (ECM) re-flashed or reset.
Non-Remote Transponder Key (ES300 1998-1999)
You are purchasing an UNCUT Non-Remote Transponder Key. The Key must be cut before it will operate all of the locks on your vehicle – MAKE KEY CUTTING CHOICE ON NEXT SCREEN. Once the Key has been programmed into the car, it will start the vehicle.