A dead key fob battery can leave you stranded, unable to unlock or start your BMW. Luckily, replacing the battery is a quick and easy process that most people can do themselves at home with just a few tools. This guide will walk you through the steps of how to change the battery in a BMW key fob, so you can get back on the road and on with your day.
What You’ll Need:
Before you begin, gather the following items:
- A new CR2032 battery (This is the most common type of battery used in BMW key fobs, but it’s always best to double-check your owner’s manual to confirm the correct battery type for your specific model).
- A small flat-head screwdriver or a plastic pry tool
- Your BMW key fob
Step-by-Step Guide to Changing Your BMW Key Fob Battery:
Step 1: Locate the Battery Compartment
Examine your BMW key fob and find the small release button or sliding tab. This is usually located on the back or side of the fob.
Step 2: Open the Key Fob
Press the release button or slide the tab while gently pulling apart the two halves of the key fob. You might need to use a bit of force, but be careful not to damage the fob.
Step 3: Remove the Old Battery
Inside the key fob, you’ll see the battery, usually held in place by a small clip or by friction. Carefully pry the old battery out using your fingernail, the flat-head screwdriver, or the plastic pry tool. Avoid using excessive force, as you could damage the battery contacts.
Step 4: Install the New Battery
Insert the new CR2032 battery into the compartment, making sure to match the positive (+) side of the battery with the positive (+) marking in the fob. Usually, the positive side of the battery faces up.
Step 5: Close the Key Fob
Align the two halves of the key fob and press them firmly together until you hear a click, indicating the fob is securely closed.
Step 6: Test the Key Fob
Try locking and unlocking your car doors and starting the engine to ensure the new battery is working correctly.
Troubleshooting:
If your key fob still isn’t working after replacing the battery, here are a few things to check:
- Battery Orientation: Ensure you’ve installed the new battery with the positive (+) side facing the correct direction.
- Battery Contacts: Inspect the battery contacts inside the key fob for any dirt or corrosion. If necessary, clean them gently with a cotton swab and rubbing alcohol.
- Key Fob Programming: In rare cases, you might need to reprogram your key fob after replacing the battery. Consult your owner’s manual or contact your BMW dealership for instructions on how to do this.
“Most of the time, replacing the battery is all it takes to fix a BMW key fob that’s stopped working. It’s a simple DIY task that can save you time and money,” says John Smith, a senior automotive electrician with over 15 years of experience. “However, if you’re unsure about any step of the process, it’s always best to err on the side of caution and consult a professional.”
Conclusion:
Changing the battery in your BMW key fob is a simple task that can be completed in a matter of minutes. By following the steps outlined in this guide, you can avoid the inconvenience of a dead key fob and keep your BMW running smoothly.
FAQs
Q: How often should I change the battery in my BMW key fob?
A: Generally, the battery in your BMW key fob should last between 3 to 5 years. However, several factors can affect battery life, such as frequency of use and extreme temperatures.
Q: Can I use any brand of CR2032 battery for my BMW key fob?
A: While any brand of CR2032 battery will technically work, it’s always recommended to use a reputable brand known for its quality and longevity. This will help ensure your key fob functions reliably.
Q: What do I do if my BMW key fob still doesn’t work after replacing the battery?
A: If replacing the battery doesn’t solve the problem, you might need to reprogram your key fob. You can consult your owner’s manual or contact your BMW dealership for guidance. In some cases, there could be a more serious issue with the key fob itself, requiring professional attention.