Programming All Keys Lost on a 2015 Lexus NX300H Using the Autel IM608 PRO2

Yes, the Autel IM608 PRO2 can be used to recover all lost keys on a 2015 Lexus NX300H. Due to recent changes in Autel’s software for Toyota and Lexus vehicles in the U.S., some features may be limited, which concerned the customer. To ensure the procedure went smoothly, I guided them through each step.

Required Tools

Autel IM608 II
Autel APB112 Key Simulator
New Smart Key

Step-by-Step Key Programming Procedure

Step 1: Identify the Vehicle and Perform an IMMO Status Scan

Access the IMMO function.
Select: Current Region >> USA >> NX300H >> 2015-2021 >> Smart Key >> OK >> Immo Status Scan.
Check how many keys are currently registered.

Step 2: Use the “All Keys Lost” Hot Function

Go to Hot Function >> All Keys Lost (with Analog Key).
Turn the hazard lights on, then off. Press the start/stop button 5 times, leaving the ignition off.
When prompted, confirm that IMMO data has not been backed up.

Ensure a stable network connection.

Turn off the ignition and cycle the hazard lights once.
Note: Turn off the device’s Bluetooth, and connect the VCI directly to the diagnostic tool with a USB cable to avoid failure.
Save the EEPROM file.
Key type: SLK3.
Connect the APB112 Key Simulator.
Generate the analog key, which should remain in the “ON” position.

Step 3: Register the Key

Connect the analog key to the Start/Stop button and press it.

If the device lights up, select “Yes” to proceed.
If it does not light up, select “No” to troubleshoot.

Hold the analog key near the START button, then place the new smart key near it as well.

Step 4: Add the New Smart Key Using APB112

Select Add Smart Key >> Start.
Turn on the hazard lights.

Note: Complete each step within the specified time.

Place the new smart key near the START button.
If you hear a beep and the car starts, the new key has been successfully registered.
To confirm, return to the IMMO Status Scan, where two registered keys should now appear.

Final Tips

If one tool can’t perform a function, consider trying another; each has unique strengths and limitations.
Even if the system displays “Failed,” check the physical key and system registry, as it may still be successful.

This process should restore all lost keys on the Lexus NX300H with the Autel IM608 PRO2.

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