1. Check Compatibility: Ensure that the key fob you have is compatible with your Audi A4 model and year.
2. Gather Tools: You will need a new key fob and a working master key.
3. Prepare the Car: Put the ignition key into the ignition and turn it to the "ON" position. Leave it in this position for at least 2 minutes with the doors closed and locked.
4. Access Programming Mode: While the ignition key is still in the ignition, open and close the driver's side door 5 times within 10 seconds. This should put the car into programming mode.
5. Insert Master Key: Insert the working master key into the ignition and turn it to the "ON" position for a few seconds. Then, turn it back to the "OFF" position.
6. Insert New Key Fob: Immediately after turning the master key to the "OFF" position, insert the new key fob into the ignition and turn it to the "ON" position for a few seconds. Then, turn it back to the "OFF" position.
7. Repeat Step 6: Repeat step 6 with the new key fob up to 3 times.
8. Synchronization: After programming all desired key fobs, leave the key in the ignition and turn it to the "ON" position for at least 2 minutes. This allows synchronization between the car and the new key fobs.
9. Test Key Fob: Try locking and unlocking the doors using the new key fob to ensure that programming was successful.
10. Deactivate Programming Mode: To deactivate programming mode, open the driver's side door and disconnect the car's battery. Reconnect the battery after 1 minute.
Note: Please refer to your Audi A4 owner's manual for specific instructions and requirements as the exact programming steps may vary depending on your car's model and year. Additionally, if you have a keyless entry system, the programming steps may be different. If you encounter any difficulties or uncertainties during the programming process, it's best to consult with an authorized Audi dealer for assistance.
