Are you having trouble starting your Audi vehicle using the key fob? It could be because the battery in your key fob needs to be replaced. Don’t worry; changing the battery in an Audi key fob is a relatively simple process that you can do at home.
How to change the battery in Audi key fob is a straightforward process that can save you time and ensure your remote continues to function smoothly. Over time, the battery may deplete, leading to a less responsive key fob or complete inactivity. By learning how to change the battery yourself, you can avoid the inconvenience of a non-working key fob and the cost of a dealership service.

This guide will walk you through the steps to safely and effectively replace the battery, ensuring your key fob remains in optimal condition.
What Will You Need?
Ensure you have all the necessary materials before changing the battery in your Audi key fob.
- Replacement battery (CR2032)
- Small flathead screwdriver
- Towel or soft cloth
Once you have these items, you’re ready to begin the battery replacement process.
10 Easy Steps on How to Change the Battery in Audi Key Fob
Step 1. Identify the Key Fob Type:
Audi key fobs come in different varieties depending on the model and year of the vehicle. It’s essential first to identify which type of key fob you have, as the battery replacement process might slightly differ. Look for any distinguishing features, such as the number of buttons, the presence of a physical key blade, or any unique design elements.

Generally, Audi key fobs fall into two main categories: the traditional key fob with a flip-out metal key blade and the newer, more streamlined intelligent key fob. Understanding the type of key fob you have will ensure you follow the correct steps and avoid any potential damage during the battery replacement process. Once identified, gather any additional tools or supplies specific to your essential fob type, ensuring you are fully prepared before proceeding.
Step 2. Prepare Your Workspace:
Before you start working on your key fob, clear a small space on a table or counter to serve as your workspace. Lay down a towel or a soft cloth to protect the key fob and any components from being scratched or damaged during the battery replacement. This setup will also help prevent small parts from rolling away if they are accidentally dropped. Ensuring a clean and organized workspace will make the process smoother and more efficient.
Step 3. Remove the Mechanical Key:
Locate the small notch on the side of your Audi key fob, designed to remove the mechanical key. Use your fingernail or the edge of the small flathead screwdriver to pry open the notch gently, and then pull out the mechanical key. This step is essential for accessing the battery compartment inside the key fob. Handling the critical fob gently is important to avoid any scratches or damage during the process. Once the mechanical key is removed, set it aside in a safe place where it won’t get lost as you proceed with the battery replacement.
Step 4. Open the Key Fob Case:
With the mechanical key removed, locate the seam or joint where the two halves of the key fob case meet. This is usually visible around the perimeter of the device. Carefully insert the edge of the small flathead screwdriver into the seam or designated slot and gently twist or pry to separate the halves of the case. Be cautious to avoid excessive force, which can cause damage to the key fob or its internal components.

Step 5. Remove the Old Battery:
Once the key fob case is open, locate the battery compartment. The battery is usually secured with a small clip or bracket. Using either your fingers or the small flathead screwdriver, gently lift or slide the clip to release the battery. Carefully remove the old CR2032 battery, ensuring you note its orientation to insert the new battery correctly. Be cautious not to damage any surrounding components while removing the old battery. Dispose of the old battery responsibly, as it can harm the environment if not disposed of properly.
Step 6. Insert the New Battery:
Take the new CR2032 battery and align it in the same orientation as the old one. Gently place the battery into the compartment, ensuring it fits snugly under the securing clip or bracket. Make sure the positive side of the battery, usually marked with a “+,” is facing upward. Proper placement is essential for the key fob to function correctly. Once the new battery is securely in place, you can proceed to reassemble the key fob.
Step 7. Reassemble the Key Fob Case:
Carefully align the two halves of the key fob case, ensuring that all internal components are correctly positioned and seated securely. Press the halves together gently but firmly until you hear a click or observe that they are tightly joined, without any gaps. This step ensures the key fob’s continuous protection and functionality. If the key fob does not snap together properly, double-check the alignment and try again. A properly sealed casing will help safeguard the new battery and internal elements from dust and moisture.

Step 8. Reinsert the Mechanical Key:
After successfully reassembling the critical fob case, locate the slot where the mechanical key was initially removed. Gently slide the mechanical key back into the slot until it clicks into place securely. Ensuring the mechanical key is inserted correctly is vital for maintaining the complete functionality of your key fob. If the key does not fit or lock in place effortlessly, do not force it; instead, remove it and check the orientation before attempting to reinsert it again.
Step 9. Test the Key Fob:
Now that the key fob is fully reassembled with the new battery installed testing its functionality is essential to ensure everything works correctly. Stand near your Audi vehicle and press each button on the key fob, checking for appropriate responses such as unlocking and locking the doors, opening the trunk, or activating any other features specific to your key fob model. If the key fob does not function as expected, double-check the battery orientation, and the case is closed correctly. Sometimes, you might need to reprogram the key fob or consult your vehicle’s manual for troubleshooting steps. Proper testing will ensure your key fob is ready for regular use, providing convenience and peace of mind.
Step 10. Dispose of the Old Battery Properly:
Proper disposal of the old battery is an essential environmental responsibility. Used batteries contain materials that can harm the environment and should not be thrown away with regular household waste. Locate a local recycling center or a store that offers battery disposal services. Most electronics or hardware stores have designated bins for safe battery recycling. Disposing of the old battery correctly contributes to environmental conservation efforts and compliance with local regulations. This step completes the battery replacement process for your Audi key fob and ensures that you’ll perform the task with both efficiency and ecological mindfulness.

By following these steps, you can quickly and safely replace the battery in your Audi key fob.
5 Things You Should Avoid
- Using the Wrong Battery Type: Use the correct battery type for your Audi key fob, typically a CR2032 lithium coin battery. Using an incorrect battery might damage the fob or cause it to malfunction.
- Forcing the Key Fob Open: Be gentle while opening the key fob to avoid damaging its internal components. Most key fobs have a designated slot or notch that lets you pry it open without excessive force.
- Touching the Circuitry: Avoid touching the internal circuit board when replacing the battery. Oils and static electricity from your fingers can harm the circuits, leading to operational issues.
- Ignoring the Battery Orientation: When inserting the battery, consider its orientation carefully. Installing it the wrong way can prevent the key fob from working correctly.
- Forgetting to Test the Key Fob: Always test the critical fob after changing the battery to ensure it’s functioning correctly. If the fob doesn’t work as expected, double-check that the battery is installed correctly and that all components are intact.
By avoiding these common mistakes, you can ensure your Audi key fob remains in good working condition.
Conclusion
In conclusion, changing the battery in your Audi key fob is a straightforward process that, with proper care, can preserve the functionality of your vehicle’s remote system.
Ensure you use the correct CR2032 battery type and gently handle the key fob to prevent damage. By avoiding contact with the internal circuitry and paying attention to the battery orientation, you enhance the reliability of your key fob. Always test the fob after replacing the battery to confirm it’s working as it should.
Hopefully, the article on how to change the battery in audi key fob, along with these tips on what to avoid, has helped maintain your key fob’s performance. So, follow these simple steps and enjoy the seamless operation of your Audi key fob. Happy driving!