If you’re experiencing issues with your BMW 3 Series key fob, like decreased range or unresponsive buttons, it’s highly likely that the battery is running low and needs replacing. Don’t worry, it’s a simple process you can easily handle at home with just a few common household tools. This guide will walk you through the steps of replacing the battery in your BMW key fob for various model years of the 3 Series.
Identifying Your BMW 3 Series Key Fob Type
Before we dive into the battery replacement process, it’s essential to identify which type of key fob your BMW 3 Series uses, as different models and years might have slight variations. Here’s a quick breakdown:
- Diamond Key: The most common type, featuring a rectangular shape with three buttons on the side.
- Comfort Access Key: A sleeker design with chrome accents, often found on newer models.
Once you’ve identified your key fob type, you can gather the necessary tools and proceed to the battery replacement steps specific to your model.
What You’ll Need
- Replacement Battery: The exact battery type varies depending on your key fob model. You can usually find this information in your BMW owner’s manual. Common types include CR2032 or CR2450.
- Small Flathead Screwdriver: Used to pry open the key fob casing.
- Soft Cloth: To protect your key fob from scratches during the process.
Step-by-Step Guide for Replacing Your BMW Key Fob Battery
Here’s a general guide to replacing the battery in your BMW 3 Series key fob. Please note that slight variations might exist depending on the specific model year. Refer to your owner’s manual for model-specific instructions.
Step 1: Locate the small release button on the back of your key fob. It’s usually located near the key ring.
Step 2: Gently press the release button and simultaneously slide out the metal key from the fob.
Step 3: Use the flathead screwdriver to carefully pry open the key fob casing. Start at the seam where the metal key was inserted.
Step 4: Once the casing is slightly open, you can use your fingers or the screwdriver to gently separate the two halves of the fob.
Step 5: Inside, you’ll find the battery. Carefully remove it, noting the orientation for the new battery.
Step 6: Insert the new battery, ensuring it’s positioned correctly with the positive (+) side facing up.
Step 7: Align the two halves of the key fob casing and press them together firmly until you hear a click, indicating they’re securely closed.
Step 8: Reinsert the metal key into the fob.
Step 9: Test all the buttons on your key fob to ensure the new battery is working correctly.
Troubleshooting Tips
If you’re still experiencing issues with your BMW key fob after replacing the battery, here are a few troubleshooting tips:
- Check Battery Orientation: Ensure the new battery is inserted correctly with the positive (+) and negative (-) terminals aligned properly.
- Clean the Battery Contacts: Over time, the battery contacts inside the key fob can accumulate dirt or corrosion. Use a cotton swab and a bit of rubbing alcohol to clean the contacts gently.
- Reprogramming: In some cases, you might need to reprogram your key fob to your BMW after a battery replacement. Refer to your owner’s manual for instructions on how to do this.
Common Questions About BMW Key Fob Batteries
Q: How long does a BMW key fob battery last?
A: The lifespan of a BMW key fob battery can vary depending on usage and other factors, but they generally last between 3 to 5 years.
Q: Can I drive my BMW with a low key fob battery?
A: Yes, you can usually start your BMW with a low key fob battery by holding it close to the steering column or using the hidden key blade to unlock the car manually. However, some features might not function correctly.
Q: Where can I buy a replacement battery for my BMW key fob?
A: You can find replacement batteries at most auto parts stores, electronics stores, and online retailers. Make sure to purchase the correct battery type specified in your owner’s manual.
Q: Can I replace the battery myself, or should I go to a dealership?
A: Replacing the battery in a BMW key fob is a relatively straightforward process that most people can do themselves. However, if you’re uncomfortable with the process, you can always take it to a dealership or an authorized service center.
Q: What happens if my BMW key fob stops working entirely?
A: If your BMW key fob is entirely unresponsive, even after replacing the battery, there might be a more significant issue with the fob itself. You’ll need to contact a BMW dealership or an authorized service center for further diagnosis and repair.
Need More Help?
If you have a different model BMW, such as the 2012 3 Series, you can find information on the 2012 BMW 3 Series key fob battery on our website. For information on replacing the battery in your 2012 key fob, check out our guide on 2012 BMW key fob battery change.
We also have helpful resources for other BMW models, like the X3. If you’re experiencing problems with your 2011 X3 key fob, you can find troubleshooting tips in our article on the 2011 BMW X3 key fob not working.
For those looking for a replacement key fob, we have guides available for different models, including the 2016 BMW 328i key fob replacement.
And for information on the battery for the 2017 5 Series key fob, you can visit our page on the 2017 BMW 5 series key fob battery.
Keep Your BMW Running Smoothly
A well-maintained Key Fob is essential for the seamless operation of your BMW. By following the steps outlined in this guide, you can replace the battery in your BMW 3 Series Key Fob and keep your car running smoothly for years to come. If you ever encounter any issues or have questions, don’t hesitate to reach out to us. Our team of experts is always here to help.
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