<h1>Programming Instructions for the 2019 Lexus GX460 Keyless Entry Remote Fob (Smart Key)</h1> <p><font size="3"><b>Important:</b> The 2019 Lexus GX460 does not support onboard programming for smart key remote fobs. Programming must be performed by a qualified automotive technician using professional diagnostic tools. </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 fob is compatible with the 2019 Lexus GX460 and has not been previously registered to another vehicle. </font></li> <li><font size="3">Step 2: Schedule service with a certified technician who specializes in keyless entry systems and has access to manufacturer-grade programming equipment. </font></li> <li><font size="3">Step 3: Confirm that the technician uses secure diagnostic software capable of interfacing with the vehicle’s electronic control unit and key registration system. </font></li> <li><font size="3">Step 4: If the vehicle is operational, consider driving it to the technician’s location to reduce potential mobile service fees. </font></li> <li><font size="3">Step 5: Bring all currently active smart keys to the appointment. In some cases, all remotes must be present during programming to ensure proper synchronization. </font></li> <li><font size="3">Step 6: The technician will connect diagnostic equipment to the vehicle’s onboard port, typically located beneath the dashboard. </font></li> <li><font size="3">Step 7: The new smart key will be registered through the vehicle’s secure key programming interface, enabling full remote and ignition functionality. </font></li> <li><font size="3">Step 8: After programming is complete, the technician will test all functions—including locking, unlocking, and push-button start—to ensure the smart key is working correctly. </font></li> <li><font size="3">Step 9: If you need to program additional smart keys, they can typically be added during the same session. </font></li> <li><font size="3">Step 10: Before completing the service, verify that all programmed keys function properly and that the vehicle responds correctly to each.</font></li> </ul>