How to Change the Battery of the Audi A5 Smartkey Fob?

by Phil Borges // in Car

Audi A5 SmartKey Fob is a small keyless entry system that operates the central locking and ignition of an Audi. The battery in this device can run down over time, which will make it stop working properly or even not work at all. If you are having trouble starting your Audi, the chances are that the battery in your SmartKey fob is dead. In order to fix this problem, it’s important to know how to change Audi key battery. Luckily, the 2019 Audi key battery replacement is very simple and can be done by anyone with some basic knowledge of cars.

How to replace Audi A5 key battery?

Over time, you may notice that your car’s computer no longer responds as effectively to your remote control signals as it once did. However, the remote is costly and delicate, so you don’t want to shatter it while attempting to pry it open for a battery swap. How to replace Audi key battery? Follow the instructions below:

  1. Remove the physical key from the smart key fob by pressing the release button. Slide-out the key and set it aside.
  2. Locate another small button at the front of the Audi Fob remote. Press and pull out the battery tray gently. Releasing the battery tray may be hard to pull out as it has a rubber seal.
  3. Take out the old battery from the battery tray and replace it with the new one. Audi A5 Smart key fob uses a CR2032 lithium battery. Make sure that the side of the battery with the writings on it is facing down. Get the right Audi key battery type to have success in replacing. This type of battery is available anywhere that sells watch batteries or small electronics.
  4. Reattach the battery tray to the remote by pushing gently until it locks in place into its original position.
  5. Return the physical key to the Audi Fob remote.

Your new battery is now in place! Your smart key fob’s programming will not be affected by changing the battery, so you do not have to reprogram it again. Don’t forget to drop off the old battery at the store where you bought your new one, as they can recycle or dispose of it properly.

No special programming is required after replacing the key fob battery. The key fob should function as normal.

Is it possible to start a 2019 Audi A5 car with a dead key fob battery?

It is possible to start your 2019 Audi A5 with a key fob that is dead or has no battery.

First, you should remove the mechanical key out of the key fob by pressing the black buttons on each side. Use the mechanical key to get inside the car.

Second, place the key fob at the designated area. In the 2019 A5 model, you can see this at the front of the center storage area, so simply place the key fob in the case. In previous models, this designated area is placed somewhere near the dashboard.

Third, as the final step, after placing the key fob in the designated area, press the start button while your foot is on the brake pedal. The car will detect the key fob and start the ignition even the battery in the key fob is dead.

How much is a new Audi Key Fob?

The Audi key battery replacement cost is somewhere between USD200 and USD1200, but the prices may change depending on several factors such as the type of the key, the year when the car was manufactured, your location or where you get a replacement, availability of the key fob, and more. Replacement keys for late-model automobiles have more secure characteristics, so you’ll probably pay more than $350 for one.

When you require a key replacement, the most frequent action is to contact an automotive locksmith or a dealership near your location.

If you just purchased a brand new key fob, be sure to have it programmed to start the automobile. You may do this at the dealership.


The Audi Key fob is the next evolution of keyless entry technology for luxury car drivers. It allows you to start your car or open your doors without having to reach into a pocket or purse. Proper maintenance of the key fob battery is a must to ensure that you can always access your car when in need.

Replacing the battery of the Audi A5 Key Fob is a straightforward job that can be performed in a matter of minutes. If you ever notice that your key fob is not working, chances are the battery is drained. Change the battery as soon as the first sign of trouble appears.

We hope that the above information and guidelines helped you change the battery of your Audi A5 Key Fob.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.