2021 Audi A4

<h1>Keyless Entry Remote Programming Guide – 2021 Audi A4 (Smart Key System)</h1> Important Information: The 2021 Audi A4 does not support onboard programming for smart key remotes. Programming must be performed by a qualified technician using factory-approved diagnostic tools. Step-by-Step Programming Instructions: <ul> <li>Step 1: Contact a certified Audi dealership or a professional automotive technician with experience in smart key programming. </li> <li>Step 2: Confirm that the technician uses manufacturer-compatible diagnostic equipment that can access the vehicle’s electronic control and immobilizer systems. </li> <li>Step 3: Schedule an appointment and ask if programming can be performed on-site or if the vehicle must be brought to the service facility.</li> <li> Step 4: If the vehicle is operable, driving it to the service provider may reduce costs associated with mobile programming. </li> <li>Step 5: Bring all existing smart key remotes to the appointment. Audi systems often require all remotes to be present and reprogrammed at the same time. </li> <li>Step 6: At the service appointment, the technician will connect diagnostic equipment to the vehicle’s OBD-II port to communicate with the control module. </li> <li>Step 7: The technician will program and sync the new or replacement smart key remote with the vehicle’s electronic systems, ensuring secure integration. </li> <li>Step 8: Once the process is complete, the technician will test all remote functions—including lock, unlock, trunk release, and push-button start (if equipped)—to confirm everything is working correctly. </li> <li>Step 9: Verify proper operation of each remote before completing the service. </li> <li>Step 10: Request a written service summary or receipt as confirmation of successful programming.</li> </ul>

2021 Audi A4

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