How to Program2024 LiAuto L6 All Keys Lost with Lonsdor K518 PRO?

Here's an all-keys-lost 2024 Li Auto L6 job completed with the Lonsdor K518 PRO. No seat removal or battery disconnection is required. Connect the Li Auto & NIO 2-in-1 Cable to the BCM, then the key can be programmed normally.

Access the BCM & Connect the K518 PRO

1. Remove the driver's side lower trim panel and release the retaining clips. 

2. Locate the BCM, unplug the blue connector, and connect the LiAuto 2-in-1 Cable. 

3. Reconnect the BCM connector, plug the OBD cable into the vehicle, then connect the K518 PRO through its OBD interface. 

Perform the All Keys Lost Procedure

On the K518 PRO, go to:

Immo & Remote → LI AUTO → L6 → 2024-2026 → Smart Key

1. Select Read Key Count and confirm the current key count is 0. 

2. Select Program Smart Key, then press OK to continue. The tool supports programming up to two keys. 

3. The system deletes all previously registered keys automatically. After the deletion is complete, place the key to be programmed in the vehicle's induction area and continue. When the key count changes to 1, press OK to add another key if needed, or Cancel to finish programming. 

Verify the Repair

Start the vehicle and check that the newly programmed smart key operates normally. If the vehicle starts and the key functions correctly, the programming is complete.

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How to Add 2025 BYD Formula Leopard Ti7 Key with Lonsdor K518 Pro?

Adding a new smart key to the 2025 BYD Formula Leopard Sealion 7is a straightforward process when using the Lonsdor K518 Pro. This guide provides a concise, step-by-step walkthrough of the programming procedure.

Preparation and Tools Needed

Before starting, ensure you have the following items ready:

Lonsdor K518 Pro Key Programmer

OBD communication cable

Original car key and the new smart key

A stable internet connection

Step 1: Generate the Smart Key

First, you must prepare the new key to be recognized by the vehicle’s system.

1. Navigate to Generate Smart Key > BYD > Formula Leopard >Sealion 7 2025 ID4A

2. Place the new key into the K518 Pro's card slot.

3. Click Generation and wait for the "Generated successfully" message.

Step 2: Read Data and Password

To access the immobilization system, you must retrieve the vehicle's security data.

1. Locate and remove the cross-domain platform box located below the steering wheel to facilitate password reading.

2. On the K518 Pro, select Immo & Remote > BYD >Smart Key > Formula Leopard Series > Sealion 7> 2025- > Program smart key

3. Follow the on-screen prompts: Turn off the ignition and turn on the hazard lights (flashing lights).

4. Select Method 3: Disassemble the left EEPROM of the CEM module to obtain the 32-bit PIN code

5. The device will read the EEPROM data. Once successful, save the file to your device.

Step 3: Program the Smart Keys

Note: All keys not present during this process will be deleted from the system. You can program up to 4 keys total.

1. Select the saved EEPROM file to begin programming.

2. Program Key 1: Place the first key (original) in the vehicle's sensing area and click OK until "Program complete" appears.

3. Program Key 2: Place the second key (new) in the sensing area and click OK.

4. Once both keys are registered, click Cancel to finish the session.

Step 4: Verify Functionality

Always test both keys to ensure the immobilization and remote features are working perfectly.

Engine Start: Press the brake and the Start button with each key individually to confirm the engine starts.

Remote Features: Test the Lock and Unlock buttons on both the original and the new smart key.

The programming for your 2025 BYD Formula Leopard Sealion 7 is now complete.

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Lonsdor K518 PRO Adds 2020+ Hyundai Elantra Smart Key Success

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.

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How to Convert LT20 Smart Key Type in Lonsdor K518 PRO?

This is a tutorial on how to convert the LT20 Smart Key type in Lonsdor K518 PRO. We'll need an original key for detecting first.

Special Functions >> Key settings >> LT smart key >> Convert smart key type

This function requires an Internet connection.

Push open the card slot's baffle on the device.

Place the key to be generated into the K518 PRO card slot.

Press "OK".

Selected "By identifying working key".

Please place a working key into this K518 PRO card slot.

In the frequency test, slowly take the LT20 smart key 20cm away from the card slot.

Now we can see the frequency of the working key.

Current frequency: 433.58/434.42 MHz

Select the frequency we just detected >> Choose the button type same as the working key

Working key identification is complete.

Please put the LT20 smart key back into the K518 PRO card slot to generate.

Start to convert...

Generated successfully.

If the key has a remote but no smart function after key programming is successful, please enter the "Modify frequency" function menu to change.

Done.

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