How To Replace The Bmw 320I Key Fob Battery In 2023

BMW 3 series Key Fob Battery replacement DIY 320i YouTube
BMW 3 series Key Fob Battery replacement DIY 320i YouTube from


The BMW 320i key fob is an essential accessory that allows you to lock and unlock your car remotely. However, like any other electronic device, the key fob battery will eventually run out of power and require replacement. In this article, we will guide you through the process of replacing the key fob battery for your BMW 320i in the year 2023.

Step 1: Gather the Required Materials

Before you begin, make sure you have the necessary materials at hand. You will need a replacement battery for your BMW 320i key fob, which is usually a CR2032 lithium coin cell battery. You can easily find these batteries at your local electronics store or online.

Step 2: Open the Key Fob

To replace the battery, you first need to open the key fob. Locate the small indentation on the side of the key fob, and using a small flathead screwdriver or a coin, gently pry it open. Be careful not to apply too much force to avoid damaging the key fob.

Step 3: Remove the Old Battery

Once the key fob is open, you will see the old battery. Carefully remove it by gently pushing it out of the holder. Take note of the battery’s orientation, as you will need to insert the new battery in the same way.

Step 4: Insert the New Battery

Take the new CR2032 battery and align it in the same orientation as the old battery. Insert it into the battery holder, ensuring that it fits securely.

Step 5: Close the Key Fob

After inserting the new battery, carefully close the key fob by aligning the two halves and pressing them together until you hear a click. Make sure the key fob is securely closed to prevent any water or dust from entering.

Step 6: Test the Key Fob

Now that you have replaced the battery, it’s time to test the key fob. Stand close to your BMW 320i and press the lock or unlock button. If the car responds accordingly, congratulations, you have successfully replaced the key fob battery!

Tips for Maintaining your Key Fob Battery

1. Keep Spare Batteries

It’s a good idea to keep spare batteries for your BMW 320i key fob in case the battery dies unexpectedly. This way, you can quickly replace it and continue using your key fob without any interruptions.

2. Avoid Extreme Temperatures

Extreme temperatures can affect the performance and lifespan of the key fob battery. Avoid leaving your key fob in excessively hot or cold environments, as this can shorten its lifespan.

3. Check the Battery Regularly

Make it a habit to check the battery status of your key fob every few months. This will help you identify any potential issues before the battery completely dies.

4. Use Keyless Entry as an Alternative

If your key fob battery dies and you don’t have a replacement on hand, you can still access your BMW 320i using the keyless entry function. Refer to your car’s manual for instructions on how to activate this feature.


Replacing the key fob battery for your BMW 320i is a simple process that can be done in a few minutes. By following the steps outlined in this article, you can ensure that your key fob continues to function properly and provides you with convenient access to your car. Remember to maintain your key fob battery and keep spare batteries on hand to avoid any inconvenience in the future.