<h1>2021 Audi TT Keyless Entry Remote Fob (Smart Key)</h1> <p><font size="3"><b>Important:</b> The 2021 Audi TT does not support onboard programming for smart key remote fobs. Programming requires professional-grade diagnostic tools compatible with Audi’s vehicle systems.</font></p> <p><font size="3"><b> Step-by-Step Programming Instructions:</b> </font></p> <ul> <li><font size="3">Step 1: Verify Remote Compatibility Make sure the replacement smart key fob is specifically compatible with the 2021 Audi TT and has never been paired with another vehicle.</font></li> <li><font size="3"> Step 2: Prepare the Vehicle Put the transmission in Park. Ensure the engine is off. Leave the driver’s door open; all other doors should remain closed. Confirm that both the vehicle battery and the smart key battery are sufficiently charged. </font></li> <li><font size="3">Step 3: Connect Diagnostic Tool Plug a VAG-compatible diagnostic interface (e.g., ODIS or VCDS) into the vehicle’s OBD-II port located under the driver’s dashboard. Launch the diagnostic software and connect to the vehicle’s electronic control modules. </font></li> <li><font size="3">Step 4: Access Key Programming Function Navigate to the Key Adaptation or Immobilizer section. Log in using the appropriate access code or authorization credentials to unlock the key registration system. </font></li> <li><font size="3">Step 5: Initiate Smart Key Pairing Select the option to add a new smart key. Place the smart key fob inside the cabin near the key detection area (typically near the start button or center console). Follow the prompts provided by the diagnostic software to initiate the pairing sequence.</font></li> <li><font size="3"> Step 6: Program Additional Remotes (If Required) If you are adding more than one key fob, repeat the pairing procedure for each one. Most Audi vehicles support up to 8 registered smart keys. </font></li> <li><font size="3">Step 7: Confirm Successful Programming The system will provide a confirmation once the smart key has been successfully added. Remove the diagnostic tool and power down the software. </font></li> <li><font size="3">Step 8: Test Each Remote Function Ensure that each smart key performs all expected functions: Lock and unlock doors Trunk release Remote engine start (if equipped) Push-button ignition </font></li> <li><font size="3">Step 9: Final Checks Confirm that only your newly programmed smart keys are active. Disable or erase any lost or unused remotes during this session if desired. </font></li> </ul> <p><font size="3"><b>Additional Notes:</b> </font></p> <p><font size="3">Key fob blade (if present) may need to be manually cut for emergency use. Ensure all programming is done within time limits outlined by your diagnostic software. Avoid interruptions during the pairing process to prevent errors.</font></p>
