<h1>2007 Lexus GS450h – Keyless Entry Remote Fob Programming Instructions</h1> <p><font size="3"><b>Note:</b> The 2007 Lexus GS450h 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: Ensure that the replacement smart key remote fob is compatible with the 2007 Lexus GS450h, including the correct part number, frequency, and FCC ID. </font></li> <li><font size="3">Step 2: Confirm that the vehicle’s battery is sufficiently charged and that all doors, the trunk, and the hood are securely closed before proceeding with 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 beneath the dashboard on the driver's side. The diagnostic tool will interface with the vehicle’s Body Control Module (BCM) and Smart Key ECU. </font></li> <li><font size="3">Step 4: Access the Keyless Entry or Smart Key Programming section in the diagnostic tool's menu. </font></li> <li><font size="3">Step 5: Follow the instructions on the diagnostic tool to program the new smart key remote fob. This may involve inserting the original key or fob into the ignition or pressing specific buttons on the remote to confirm the programming. </font></li> <li><font size="3">Step 6: If programming additional remotes, repeat the process for each remote during the same session to ensure that all remotes are properly registered. </font></li> <li><font size="3">Step 7: Once the 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 verify that all functions, such as lock, unlock, trunk release, and engine start/stop, work as expected.</font></li> </ul>
