How To Program Audi A4 Key With One Key

Nothing is worse than having vital items in your pocket on laundry day! Fortunately, setting up your new fob only takes a few seconds now that you have one.

Simply press and hold the appropriate buttons while placing the key in the ignition to program an Audi key fob.

Here’s a quick guide on how to program an Audi key fob:

  • Your key fob’s unlock button should be pressed and held down.
  • Place the key in the ignition position II as you continue to depress the unlock button (ON).
  • Hold the unlock button down for a further three seconds before taking the key out of the ignition. Your key fob should now be operational.

You could possibly save yourself some time and hassle once you’re ready to resume driving by purchasing a second key fob!

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Is it possible to reprogram an old Audi key?

I’m here. As long as the key is the same for each vehicle, you can reprogram a key fob to work with that vehicle. In this situation, if the key can open the doors, you would need to take the following actions:

  • The key fob’s battery should be removed and then replaced (unless you put in a new battery)
  • After unplugging the vehicle’s battery wires, wait 30 seconds, then reconnect them (reset computer).
  • Turn the key to the ON position after inserting it into the ignition.
  • In the OFF position, turn the key.
  • Locking the door simultaneously with your hand and the remote requires turning the key to the ON position.
  • While simultaneously using the remote and your hand to unlock the door, turn the key to the ON position.
  • Remove the ignition switch’s key.
  • the driver door with the key.
  • Push the lock and unlock buttons on the key fob simultaneously with locking and unlocking the door with the key – (do this 3 times).
  • Try using the remote to unlock the doors while the door is closed after taking the key out of the lock.
  • Put the key in the ignition switch and attempt to start the engine if the doors will lock.

After completing these procedures, the key fob has been successfully reprogrammed to your car if the engine starts. If the key does not lock the doors or start the engine, it may be completely different, and you will need to get a new key. Seek out a specialist, like one from Your Mechanic, if you require more help with your keyless entry system.

Why won’t my Audi accept my key?

The key fob won’t be recognized by your car because the remote’s battery is dead. The actual remote is damaged or is no longer programmed to your vehicle. Low automobile battery voltage. The keyless entry system has to be fixed.

How is a 2002 Audi A4 key programmed?

PLEASE NOTE: You MUST HAVE ALL OF YOUR REMOTES (INCLUDING PREVIOUSLY PROGRAMMED remote(s)) with you when you start the programming procedure to sync your remote to your installed remote keyless entry (RKE) system.

(This is a security feature that keeps outsiders from getting inside your car.)



1) Unlock the driver’s door, but do not turn the key in the ignition.

2) Use the other key to lock and close the driver door (this should be the correct key; I initially used the valet key and puzzled why the programming wasn’t working).

3) Depress both buttons on the keychain for around five seconds. Both the alarm horn and the LIGHTS should sound.

4) Open the door and take the ignition key out. With the key, shut and secure the door.

NOTE: Although my ignition and engine would start, the central locking system from the key fob had failed.

I didn’t possess a backup key! I then got inside, started the engine, locked the door from the inside, and held both of the fob buttons down. I assumed it hadn’t worked because there was no flash or beep, but it did!

2003 Audi A4: The alarm would sound when I used the key to unlock the door, but once the key was in the ignition, the alarm stopped, allowing me to reprogram the remotes. It did operate even though there was no flash or beep.


Setting Up a Remote Control:

– Once, press the “Open” button on the first remote control (key fob) (to assign memory address to remote unit number one).

When the “Open” button is hit, the alarm horn will briefly sound to notify that the signal has been received.

– At 1-second intervals, press the “Open” button on the second remote control (key fob) (to assign memory address to remote unit number two).

– If more remote units (key fobs) are required, repeat the process to allocate memory addresses 3 and 4.


– Use the second key to latch and secure the driver’s door (while the ignition remains on).

Take the first remote and hit the “UNLOCK” button ONCE ONLY; the door will remain locked despite the alarm beeping.

– More information can be found at

Want a professional to configure the remote for you since you’re having problems doing it yourself? Find a qualified key fob installer in your neighborhood by typing your city or zip code in the search box below.

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Does programming a key fob require two keys?

No, you don’t at all require any previously programmed keys because the process completely eliminates any prior pairings and just establishes those that are part of it.

Without the original key fob, how can a key fob be programmed?

After locking every door, turn the ignition off. Set the accessory or “ACC” position on the ignition key. The door locks will cycle once once you turn the ignition key off once more. To program the key fob, press any button three times in a row.

How do I set up my brand-new PCM key?

There are a few manufacturers who will let you program a single key even if you don’t have a working key. Remember that you’ll still need to have the key cut to suit the ignition, which necessitates presenting the locksmith with evidence of ownership.

Nevertheless, it is far easier to do this than to program a second or third key:

  • Turn the ignition to the on position after inserting the key. Just the electronics, leave the engine off.
  • After 10 minutes and 30 seconds, switch off the light by turning the key.
  • Restart the key, then wait another 10 minutes and 30 seconds before turning it off once more.
  • Thirdly, repeat the procedure.
  • To program the key, turn it back to the on position.
  • In order to test your new key, start the engine.

Step 3: Cycle the Ignition

Put your key in the ignition and hold down the “UNLOCK” button on your door. We will now turn the ignition on and off twice. Please take note that we are merely turning the key one notch to power the electrical systems, not starting the car.

Step 5: Hold Down the “UNLOCK and “LOCK Button on Your Fob

Press and hold the “LOCK” and “UNLOCK” buttons on the key fob simultaneously until the locks cycle one more to program your keyless-entry remote. Please be patient as this could take up to 30 seconds.