Fix Your E65 Fob Fast: BMW 7 Series Battery Guide (2001-2008)

Introduction

Maintaining the functionality of your BMW 7 Series key fob is essential. A non-responsive key fob can be frustrating, especially in urgent situations. In this guide, I’ll walk you through the steps to replace the battery in your BMW 7 Series key fob for models 2001 to 2008. This includes models such as 730i, 735i, 740i, 745i, 750i, 760i, Alpina B7, 730d, 740d, and 745d.

Identifying Your Key Fob

Before diving into the battery replacement process, it’s crucial to identify which type of key fob you have. The BMW 7 Series from 2001 to 2008 features two types of key fobs:

• Comfort Access Key Fob
• Non-Comfort Access Key Fob

In this guide, I’ll focus on the Comfort Access Key Fob, which is relatively simple to replace.

Tools and Materials Needed

To replace the battery in your key fob, you’ll need the following:

• CR2032 Coin Battery
• Flathead Screwdriver

Step-by-Step Battery Replacement

Step 1: Remove the Internal Key

First, locate the internal key within your key fob. This is usually a small metal key that can be pulled out from the fob. Simply slide the release mechanism and pull the key out.

Step 2: Access the Battery Compartment

After removing the internal key, you’ll see a small opening at the back of the key fob. This is where you’ll use your flathead screwdriver to gently pry open the battery compartment. Be careful not to use excessive force to avoid damaging the fob.

Step 3: Remove the Old Battery

Once the compartment is open, you’ll see the old CR2032 battery. Carefully pop it out, making sure to note the orientation of the battery. The lettering on the battery should be facing up.

Step 4: Insert the New Battery

Take your new CR2032 coin battery and insert it into the compartment, ensuring the lettering is facing up. This ensures proper connectivity and functionality.

Step 5: Reassemble the Key Fob

After inserting the new battery, snap the battery compartment cover back into place. Then, reinsert the internal key into the key fob. Your key fob should now be fully functional.

Non-Comfort Access Key Fob

If you have a Non-Comfort Access Key Fob, the process is slightly different. This type of key fob uses a rechargeable battery that requires soldering for replacement. If you’re not comfortable with soldering, it’s advisable to seek professional help for this type of key fob.

Why Choose the CR2032 Coin Battery?

The CR2032 coin battery is a popular choice for many key fobs and small electronic devices. It’s known for its reliability and long-lasting power. Here are some reasons why the CR2032 is ideal for your BMW 7 Series key fob:

• Long-lasting power
• Reliable performance
• Easy to find

Common Issues and Troubleshooting

Even after replacing the battery, you might encounter some issues with your key fob. Here are some common problems and their solutions:

Unresponsive Key Fob

If your key fob is still unresponsive after replacing the battery, try the following:

• Check battery orientation
• Ensure battery contacts are clean
• Reprogram the key fob

Intermittent Functionality

If your key fob works intermittently, consider these steps:

• Check for loose connections
• Ensure battery is fully seated
• Replace battery again

Preventive Maintenance

To extend the life of your key fob and avoid frequent battery replacements, consider these preventive measures:

• Avoid exposing key fob to extreme temperatures
• Keep key fob dry
• Store key fob in a safe place

Conclusion

Replacing the battery in your BMW 7 Series key fob is a straightforward process that can save you time and frustration. By following the steps outlined in this guide, you can ensure your key fob remains functional and reliable. Remember to use a high-quality CR2032 coin battery for the best performance.

FAQ

What type of battery does the BMW 7 Series key fob use?

The BMW 7 Series key fob uses a CR2032 coin battery.

Can I replace the battery myself?

Yes, you can easily replace the battery yourself with a flathead screwdriver and a new CR2032 battery.

What should I do if my key fob is still not working after replacing the battery?

Check the battery orientation, ensure the contacts are clean, and consider reprogramming the key fob.

How often should I replace the key fob battery?

It’s recommended to replace the battery every 1-2 years, depending on usage.

What if I have a Non-Comfort Access Key Fob?

A Non-Comfort Access Key Fob requires soldering for battery replacement. Consider seeking professional help for this type.

Is it safe to use generic batteries?

It’s best to use high-quality, branded batteries to ensure reliable performance and longevity.

Can I use a different type of coin battery?

No, it’s important to use the specified CR2032 coin battery for proper functionality.

How do I know if my key fob battery is low?

Signs of a low battery include reduced range and intermittent functionality.

Will replacing the battery void my warranty?

No, replacing the battery will not void your warranty.

Where can I buy a CR2032 battery?

You can purchase a CR2032 battery from various online retailers, such as Amazon, or local electronic stores.