Turn on Audi to read erase ABS light

Replace Audi Key Fob Battery

Can’t unlock or lock your Audi vehicle because of a dead key fob battery? Learn how to replace the battery by following the procedures below.

You will get a warning on your dashboard that displays a key and battery symbol on the newer Audis. To fix these problems, change the battery on your Audi key fob.

How to change the battery on an Audi key fob

  1. Use a flat screwdriver to separate the case into two halves.
  2. The battery inside the case does NOT have the flip metal key.
  3. Use the screwdriver again to separate the shell.
  4. Remove the CR1620 button cell battery. Pay attention to the positive side of the battery.
  5. Press the new battery in the housing.
  6. Press the shell together until you hear it snap.
  7. Press the two halves together, and you are done changing your Audi key battery.
  8. If the lock/unlock feature does not work after changing the battery, insert the key into the driver’s door. Turn the key to the lock and unlock position to make the car recognize your key fob. Remove the key fob from the door and press unlock.

Battery Size: CR1620 (ONE)

Bestseller No. 1
Energizer CR1620 Lithium Battery, Card of 5ORMD
Energizer CR1620 Lithium Battery, Card of 5ORMD
Electronics Model: CR1620 Battery

How to change the battery on Audi smart keyless entry remote?

This key fob has been used in many Audi cars since 2008, including A, Q, R, S, and TT models. If your Audi key fob battery is too weak or dead, it will prevent you from starting the car using the Start/Stop button.

  1. Use your thumb to press on the key release found in the chrome part of the key.
  2. Pull the metal key blade from the shell.
  3. Press the exposed plastic with your thumb and pull it out of the shell.
  4. Remove the battery from your Audi key fob. Pay attention to the positive side of the battery.
  5. Install a new battery into your Audi key fob. The positive should be facing the plastic side.
  6. Press the battery holder and the metal key into the shell.

Battery Size: CR2032 (One)

Audi Remote Battery Replacement

  1. Flip the metal key open.
  2. Use a small screwdriver to press the back cover of the key.
  3. Pry out the back cover at the end of the keyfob.
  4. The battery is inserted into the back cover. Pry it out and pay attention to the orientation of the positive side of the battery.
  5. Press the new battery on the back cover.
  6. Press the back cover into the Audi key fob.

Battery Size: CR2032 (ONE)

Over the years, Audi has come out with a few different key designs. These instructions were written to help owners change the key fob battery on Audi models such as the A3, S3, RS3, A4, S4, A5, S5, A6, S6, A7, S7, RS7, A8, S8, Q3, Q5, SQ5, Q7, TT, and R8.

Frequently Asked Questions

Does the dealer need to program the key?

No. The key will work; no programming is required after changing the battery. If your Audi key fob does not work after you change the battery, try the following:
Open the Audi using the metal key. Next, press the unlock button on the remote. Enter the vehicle and insert the key into the ignition. Lastly, remove the key from the ignition.
If the key synchronization procedure does not work, open the key and make sure the battery’s positive (+) side is on the correct side.

Can I change the shell of the Audi key fob?

Yes. If your Audi key fob is damaged or the shell is broken, you can consider replacing just the shell. New Audi key shells can be purchased online.

Is Audi key battery rechargeable?

No. Audi does NOT use rechargeable batteries in their key fobs. It is ok to use a rechargeable battery. Remember that you will need to remove and charge the battery or replace it once it dies.

My Audi key does not work after changing the battery.

Open the key again and ensure the battery is installed correctly. Check that the battery’s positive (+) side is installed on the required side.

We hope you find the Replace Audi Key Fob Battery guide helpful. Check these troubleshooting and repair guides for more help on your Audi.


  • Rushit Hila • ASE Certified

    Rushit Hila, an ASE-certified engineer (G1 Automotive Maintenance and Repair), brings over two decades of hands-on experience in the automotive world to his writing. With a strong educational background, including a Master of Science in Engineering and a Bachelor of Science in Engineering, he has honed his skills and expertise through years of practical work. As a respected authority in the field, Mr. Hila is dedicated to offering insightful and valuable content that resonates with both vehicle owners and mechanics.

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *