<h1>2020 Lexus IS350 Keyless Entry Remote Fob (Smart Key)</h1> <p><font size="3"><b>Important:</b> The 2020 Lexus IS350 does not allow onboard programming for smart key remote fobs. Programming requires the use of advanced diagnostic tools by a certified automotive technician. </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 new smart key fob is compatible with the 2020 Lexus IS350 and has not been previously registered to another vehicle.</font></li> <li><font size="3"> Step 2: Schedule an appointment with a qualified technician experienced in Lexus smart key systems and equipped with manufacturer-grade diagnostic equipment. </font></li> <li><font size="3">Step 3: Ensure the technician uses secure, factory-authorized software capable of accessing the vehicle’s electronic control unit and key registration system. </font></li> <li><font size="3">Step 4: If your vehicle is drivable, consider taking it directly to the technician’s service location to help reduce potential mobile service fees.</font></li> <li><font size="3"> Step 5: Bring all functioning smart keys with you. Some Lexus systems require all remotes to be present during programming to ensure continued functionality. </font></li> <li><font size="3">Step 6: The technician will connect a diagnostic interface to the vehicle’s onboard port, typically located under the dashboard. </font></li> <li><font size="3">Step 7: Using authorized software, the technician will access the key registration system and initiate the pairing process to program the new smart key fob. </font></li> <li><font size="3">Step 8: Once programming is complete, the technician will test the remote to confirm that all functions—lock, unlock, trunk release, and push-button start—are operating correctly. </font></li> <li><font size="3">Step 9: If needed, additional smart keys can be programmed during the same service session. </font></li> <li><font size="3">Step 10: Before concluding the appointment, verify that all programmed remotes function properly and that the vehicle responds as expected to each.</font></li> </ul>