How to Replace the Battery in a BMW 5 Series Key Fob (2007-2010)

Introduction

Replacing the battery in your BMW 5 Series key fob is a straightforward process. This guide will walk you through the steps needed to ensure your key fob is functioning properly again. Whether you own a 520i, 523i, 525i, or any other model from 2007 to 2010, this tutorial is for you.

Identifying Your Key Fob

First, it’s important to identify which type of key fob you have. BMW used two different types of key fobs for the 2007-2010 5 Series models:

• Comfort Access
• Non-Comfort Access

The Comfort Access key fob has a distinctive square outline on the back, making it easy to distinguish from the Non-Comfort Access version.

Removing the Valet Key

To begin, press the button on your key fob to remove the valet key. This will give you access to the battery compartment. The valet key is a small, metal key that can be used to unlock your car manually.

Accessing the Battery Compartment

Once the valet key is removed, you’ll notice a small hole in the middle of the back of the key fob. This hole is the entry point to access the battery compartment. Use a small flat-head screwdriver or even a pair of nail clippers to gently pry into this gap. Be careful not to apply too much force to avoid damaging the key fob.

Removing the Old Battery

After prying open the back of the key fob, you’ll see the battery compartment. The battery used in these key fobs is a CR2032 coin battery. Carefully remove the old battery by popping it out of its holder. Make sure to note the orientation of the battery, as the new one will need to be inserted in the same way.

Installing the New Battery

Take your new CR2032 battery and ensure the positive side (the side with the text) is facing you. Insert the battery into the holder, making sure it is securely in place. The battery should fit snugly and not move around.

Reassembling the Key Fob

Once the new battery is in place, you can reassemble the key fob. Align the back cover with the key fob and press it back into place until it snaps securely. Finally, reinsert the valet key into its slot.

Testing the Key Fob

With the new battery installed, test your key fob to ensure it is working correctly. Try locking and unlocking your car, and ensure all buttons are responsive. If everything is functioning as expected, you’ve successfully replaced the battery in your BMW 5 Series key fob.

Where to Buy Replacement Batteries

You can purchase CR2032 batteries from various retailers. For convenience, you can buy them on Amazon. Make sure to buy from a reputable seller to ensure you are getting a quality battery.

Additional Resources

If you need further assistance, you can refer to the full guide available at Fob Battery. This website provides comprehensive information on key fob battery replacements for various BMW models.

FAQ

What type of battery does my BMW 5 Series key fob use?

Your BMW 5 Series key fob uses a CR2032 coin battery.

How do I know if my key fob battery needs replacing?

If your key fob is not responding or has a weak signal, it’s likely time to replace the battery.

Can I use any CR2032 battery for my key fob?

Yes, any CR2032 battery will work.

What should I do if my key fob still doesn’t work after replacing the battery?

If your key fob is still not working, there may be an issue with the key fob itself. In this case, consult your local BMW dealership for further assistance.

Is it safe to replace the key fob battery myself?

Yes, replacing the key fob battery is a simple and safe process that you can do at home.

Where can I find a video tutorial for this process?

You can watch a detailed video tutorial on replacing the battery for the Non-Comfort Access key fob here.

What models does this guide apply to?

This guide applies to the following BMW 5 Series models from 2007 to 2010:

• 520i
• 523i
• 525i
• 528i
• 530i
• 535i
• 540i
• 545i
• 550i
• M5
• 520d
• 525d
• 530d
• 535d