<h1>2023 Lexus IS300 Keyless Entry Remote Fob (Smart Key)</h1> <p><font size="3"><b>Important:</b> The 2023 Lexus IS300 is not equipped with onboard programming capability for smart key remote fobs. Programming must be performed by a certified technician using specialized diagnostic tools. </font></p> <p><font size="3"><b>Step-by-Step Programming Instructions:</b> </font></p> <ul> <li><font size="3">Step 1: Confirm that the replacement smart key fob is compatible with the 2023 Lexus IS300 and has not been previously registered to another vehicle. </font></li> <li><font size="3">Step 2: Arrange service with an automotive technician who is certified in Lexus smart key systems and uses factory-level diagnostic equipment. </font></li> <li><font size="3">Step 3: Ensure the technician has access to secure software capable of interfacing with the vehicle’s key registration and immobilizer systems. </font></li> <li><font size="3">Step 4: If your vehicle is operational, consider driving it to the technician’s location to reduce costs associated with mobile services. </font></li> <li><font size="3">Step 5: Bring all current smart keys to the appointment. Lexus systems may require that all remotes be present during the programming process to ensure they remain active. </font></li> <li><font size="3">Step 6: The technician will connect a diagnostic tool to the vehicle’s onboard data port, typically located beneath the dashboard. </font></li> <li><font size="3">Step 7: Using secure procedures, the technician will initiate the pairing process and register the new smart key fob with the vehicle’s electronic system. </font></li> <li><font size="3">Step 8: Once programming is complete, the technician will test all smart key functions, including locking, unlocking, trunk access, and push-button start. </font></li> <li><font size="3">Step 9: Additional smart keys can usually be programmed during the same session if necessary. </font></li> <li><font size="3">Step 10: Before finalizing the service, confirm that all programmed remotes operate correctly and that the vehicle responds reliably to each.</font></li> </ul>