Can You Unlock Toyota 4A Smart Key Using Xhorse, Autel, or Lonsdor?

Question: Is it possible to unlock the 4A smart key from a 2023 Toyota Corolla Cross using tools like Xhorse, Autel, or Lonsdor?

Answer: Unlocking Toyota 4A smart keys is currently very limited. Here are the key points:

1. 4A Smart Key Cannot Be Unlocked by Most Tools
   • The ID4A chip in Toyota vehicles such as the Corolla, Corolla Cross, and new Camry uses Hitag 3 with AES encryption.
   • This chip differs from the older 8A chip family and is not compatible with standard unlocking tools.
   • Tools like Xhorse VVDI Mini Key Tool, Autel IM series, and Lonsdor K518 Pro cannot unlock ID4A keys.
2. Only MK Tool Supports Unlocking 4A Keys
   • Currently, the only known tool capable of unlocking the 4A smart key is the MK Tool.
3. However, Unlocking May Not Be Necessary
   • When adding a key (Add Key), 4A keys typically do not lock and can be programmed directly to another vehicle.
4. All Keys Lost Situation
   • In the case of all keys lost (AKL), you need to:
     • Use a key emulator (such as KD, Lonsdor, or TANGO) to simulate a key.
     • Backup the vehicle’s immobilizer data.
     • Program the emulator first, then transfer the data to a used key.
     • Using an emulator bypasses the need for unlock codes.

Conclusion: You cannot unlock a 4A smart key with Xhorse, Autel, or Lonsdor at present. Only the MK Tool has limited support. Fortunately, unlocking is often unnecessary when adding a key. For all keys lost, emulators and proper data backup are essential.