<h1>2020 Lexus GS350 – Keyless Entry Remote Fob Programming Instructions</h1> <p><font size="3"><b>Note:</b> The 2020 Lexus GS350 does not support onboard programming for smart key remote fobs. Programming requires specialized diagnostic equipment to interface with the vehicle’s electronic control systems. </font></p> <p><font size="3"><b>Step-by-Step Programming Instructions:</b> </font></p> <ul> <li><font size="3">Step 1: Verify that the replacement smart key remote fob is compatible with the 2020 Lexus GS350, ensuring the correct part number, frequency, and FCC ID. </font></li> <li><font size="3">Step 2: Confirm that the vehicle’s battery is fully charged and all doors, the trunk, and the hood are securely closed to avoid interruptions during the programming process. </font></li> <li><font size="3">Step 3: Connect a professional-grade diagnostic tool to the vehicle’s OBD-II port, located under the dashboard on the driver’s side. This tool will communicate with the vehicle’s Body Control Module (BCM) and Smart Key ECU. </font></li> <li><font size="3">Step 4: Use the diagnostic tool to access the Keyless Entry or Smart Key Programming section in the interface. </font></li> <li><font size="3">Step 5: Follow the diagnostic tool's instructions to program the new smart key remote fob. The process may require inserting the original key or fob into the ignition or pressing specific buttons on the remote to confirm programming. </font></li> <li><font size="3">Step 6: If additional remotes need to be programmed, repeat the process for each remote during the same session to ensure all remotes are properly registered. </font></li> <li><font size="3">Step 7: Once programming is complete, follow the instructions on the diagnostic tool to exit programming mode and disconnect the tool from the OBD-II port. </font></li> <li><font size="3">Step 8: Test each newly programmed remote fob to ensure that all functions, such as lock, unlock, trunk release, and engine start/stop, are working as expected.</font></li> </ul>
