Experiencing a finicky key fob for your 2015 BMW 535i? Before you schedule a service appointment, a dead battery in your key fob might be the culprit. Luckily, replacing it is a simple DIY task you can tackle in minutes. This guide walks you through each step, ensuring you’re back to enjoying seamless entry and ignition in no time.
Is it Really the Battery?
Let’s first confirm if the battery is the issue. Look out for these common signs:
- Decreased Key Fob Range: Finding yourself standing closer to your car than usual to lock or unlock it? This is a telltale sign of a weakening battery.
- Intermittent Key Fob Function: Does your car sometimes respond to your key fob and sometimes not, even when you’re within range? This inconsistency often points to a dying battery.
- Warning Messages on Your Dashboard: Your BMW may display warnings like “Key Fob Battery Low” to alert you about the issue.
What You’ll Need
Replacing your key fob battery requires just a couple of things:
- A New Battery: The 2015 BMW 535i key fob uses a CR2032 battery. These are easily found at most supermarkets, drugstores, and online retailers.
- A Small Flat-Head Screwdriver: This will help you open the key fob casing.
Replacing the Battery: Step-by-Step
Ready to replace your battery? Here’s how:
- Locate the Release Button: On the back of your key fob, find the small, round release button.
- Release the Key Blade: Press the release button and gently pull out the metal key blade from the fob.
- Open the Key Fob Casing: Insert the flat-head screwdriver into the slot exposed after removing the key blade. Gently pry open the casing – you should hear a slight click.
- Remove the Old Battery: Carefully lift out the old CR2032 battery. Note its position for placing the new one correctly.
- Insert the New Battery: Place the new battery into the compartment, ensuring the positive (+) side faces up – just like the old battery.
- Close the Casing: Align the two halves of the key fob casing and press them together until you hear a click, indicating it’s securely closed.
- Reinsert the Key Blade: Slide the metal key blade back into its slot until it locks in place.
Testing Your New Battery
Once the key fob is reassembled, test it by trying to lock and unlock your car. If everything works as expected, you’ve successfully replaced your battery!
Still Having Problems?
If your key fob still isn’t working correctly after replacing the battery, there might be another issue. In this case, it’s best to consult with a qualified BMW technician for diagnosis and repair.
“Remember,” says Mike Alvarez, Senior BMW Technician at Bavarian Autohaus, “while key fob battery replacement is a straightforward process, it’s important to handle the fob with care. Avoid using excessive force when opening the casing to prevent any damage.”
Frequently Asked Questions
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How long does a BMW key fob battery last? Typically, a BMW key fob battery can last anywhere from 3 to 5 years, depending on usage.
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Can I drive my BMW with a low key fob battery? Yes, you can still start your BMW with a low key fob battery. Most BMW models have a backup system that allows you to start the engine by holding the fob near the steering column.
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Can I replace the key fob battery myself, or do I need to go to a dealership? Replacing the Key Fob battery is a simple task you can easily do yourself.
Need More Help?
We’re here to assist you! Contact our team of automotive experts via WhatsApp at +1(641)206-8880 or email us at [email protected]. We’re available 24/7 to answer your questions and provide expert advice.
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