The Lonsdor K518 PRO Key Programmer has been tested successfully for adding a smart key to the 2026 Toyota Avalon. The procedure uses the LT32 4A-B6 Key.
Tools
Original Key
Identify the Key Type & Generate LT32
- Select Identify and Copy. Put the original key into the K518PRO slot and select Edit EEPROM. Check line 40H. B6 confirms the 4A-B6 chip type.
- Go back to key generation: Generate Smart Key → Toyota → Avalon → 2025-/ID4A_B6.
- Put the LT32 Smart Key into the K518 PRO slot and select Generate. After successful generation, select Cancel and return.
Back Up PEPS Immo Data
- Go to Immo & Remote → Toyota → Select from vehicle → China → Avalon HV → 2025-2026 → Smart key(4A_B6) → Backup Immo data.
- Connect the FP30 Cable to the PEPS case. Click OK. Confirm the network connection, switch the ignition on, and click OK.
- Enter a file name and save the data. The K518PRO will confirm that the immo data backup is successful.
Add the Smart Key
- Select Add smart key. Confirm the network connection and vehicle power. Switch the ignition on and click OK.
- Select Load the read D-FLASH data of PEPS to acquire 12-bit PIN code. Choose the first backup file saved earlier.
- Check the key count and click OK. Use the original key to tap the ignition. When the buzzer beeps once, remove it. Then use the LT32 to tap the ignition.
- After the operation is complete, click OK and turn the ignition off.
Final Check
Start the vehicle with both the LT32 and original key. Both keys start the vehicle normally, and the lock/unlock remote functions work.
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