1. Ensure the new key is the right one by comparing it to the old one. Make sure the blade and the chip are identical.
2. Insert the new key into the ignition and turn it to the "ON" position.
3. Do not start the engine. Instead, turn it off and remove the key.
4. Repeat this step two or three more times.
5. In certain cases, this process might not be sufficient to program the new key, you might need to turn the ignition to the ‘ON’ position and wait for 10 minutes before turning back the key to the OFF’ position.
6. Try to start the vehicle.
If the vehicle starts, the new key has been successfully programmed. If the vehicle does not start, you may need to consult your car's owner's manual or a qualified mechanic for further assistance. It's important to note that some cars may require special tools or software for key programming, so if you are unsuccessful, it is best to consult a professional.