This guide provides clear step-by-step instructions on how to program a smart key for a 2020 Hyundai Elantra using the Lonsdor K518 PRO tool.
Required Equipment
Lonsdor K518 PRO Key Programmer
OBD communication cable
One original car key
A new Lonsdor smart key
Step-by-Step Programming Instructions
1. Generate New Key
① Connect & Select Vehicle, plug the OBD cable into the vehicle.
② On the K518 PRO, go to:Generation Smart → HYUNDAI → Elantra → Elantra (2020-) ID47
③ Insert the new smart key into the card slot.
④ Tap "Generate" and wait for success.
2. Program Smart Key
① Return to the main menu and select:Immo & Remote → HYUNDAI → Select from Vehicle → China → Elantra 7 → 2020- → Program Smart Key
② Ensure Wi-Fi is connected. Turn the ignition OFF. Open and close the driver's door once.
③ The PIN cannot be read directly—obtain it from a verified source. Enter PIN: 855419 (example used in guide).
④ Within 5 seconds, hold the smart key head against the start button until the immobilizer light turns on. Confirm programming when prompted.
⑤ Follow the same steps for each additional key. All keys must be programmed to start the vehicle.
3. Complete Process
Press Cancel when finished. The tool will display the number of keys successfully programmed.
Verification
1. Test all programmed keys to ensure they start the vehicle.
2. Confirm remote functions operate normally.
Important Notes
Incorrect PIN entry 3 times will lock the function.
Always program all keys in one session.
Keep the original key accessible during the process.
This guide is intended for professional automotive locksmiths and technicians. Always follow vehicle-specific procedures and use secure PIN sources.
