<h1>2009 Lexus GS350 – Keyless Entry Remote Fob Programming Instructions</h1> <p><font size="3"><b>Note:</b> The 2009 Lexus GS350 does not support onboard programming for smart key remote fobs. Programming requires the use of specialized diagnostic equipment capable of interfacing with the vehicle's electronic control modules. </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 2009 Lexus GS350, including the correct part number, frequency, and FCC ID. </font></li> <li><font size="3">Step 2: Ensure the vehicle's battery is fully charged, and all doors, trunk, and hood are securely closed to avoid interruptions during the programming process. </font></li> <li><font size="3">Step 3: Use a professional-grade diagnostic tool to connect to the vehicle’s OBD-II port, located beneath 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: Navigate through the diagnostic tool’s interface to access the Keyless Entry or Smart Key Programming section. </font></li> <li><font size="3">Step 5: Follow the instructions on the diagnostic tool to program the new smart key remote fob. The tool may prompt you to insert the original key or fob into the ignition or press specific buttons on the remote for recognition. </font></li> <li><font size="3">Step 6: If programming multiple remotes, repeat the process for each one during the same session to ensure all remotes are properly registered with the vehicle. </font></li> <li><font size="3">Step 7: After programming, follow the diagnostic tool’s instructions 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 proper operation, including lock, unlock, trunk release, and engine start/stop functions.</font></li> </ul>
