Owning a 2018 BMW 3 Series is a joy, but even the most well-crafted machines need a little TLC now and then. One tiny component that can cause a surprising amount of frustration is your key fob battery. A dead battery means being locked out of your car, so staying ahead of the game is key (pun intended!). This guide will walk you through everything you need to know about your 2018 Bmw 3 Series Key Fob Battery, from recognizing the signs of a dying battery to replacing it yourself.
Signs Your Key Fob Battery Needs Replacing
Before you find yourself stranded, your BMW key fob will usually give you a few hints that its battery is nearing the end of its life. Keep an eye out for these telltale signs:
- Decreased Range: Are you noticing that you need to stand closer to your car for it to unlock? A fading battery means a weaker signal, so reduced range is often the first sign of trouble.
- Intermittent Functioning: Does your car sometimes unlock and sometimes not, even when you’re sure you pressed the button? Inconsistent performance is another common symptom of a low key fob battery.
- Warning Message on Dashboard: Your BMW is smart, and it’ll likely try to tell you when the key fob battery is low. Keep an eye out for a message on your dashboard that says something like “Key Fob Battery Low” or a similar alert.
What Battery Does a 2018 BMW 3 Series Key Fob Use?
Your 2018 BMW 3 Series key fob uses a CR2032 battery, a common type of lithium coin battery. You can find these batteries at most hardware stores, auto parts stores, and online retailers.
Replacing Your Key Fob Battery: A Step-by-Step Guide
Replacing your key fob battery is a quick and easy process that you can do yourself at home. Here’s a simple guide to follow:
- Locate the Battery Compartment: On the back of your key fob, you’ll find a small release button or slider. Press this button and gently separate the key fob’s two halves.
- Remove the Old Battery: Carefully remove the old CR2032 battery from its compartment. You can use a small flathead screwdriver or your fingernail to pry it out gently.
- Install the New Battery: Insert the new CR2032 battery into the compartment, making sure the positive (+) side is facing up.
- Reassemble the Key Fob: Align the two halves of the key fob and press them together until they snap back into place.
Testing Your New Key Fob Battery
Once you’ve replaced the battery, test all the key fob’s functions (lock, unlock, panic button) to ensure everything is working correctly.
Expert Tip from John Miller, Automotive Electrician: “When replacing your key fob battery, be sure to avoid touching the battery’s flat surfaces. This helps prevent transferring oils from your skin, which can reduce battery life.”
Key Fob Battery Life and Replacement Costs
A typical key fob battery lasts for about 3-4 years, but this can vary depending on usage and environmental factors. Replacement batteries are inexpensive, usually costing between $5-$10.
FAQ: Common Questions about 2018 BMW 3 Series Key Fob Batteries
Q: Can I drive my BMW with a low key fob battery?
A: Yes, you can still start and drive your BMW with a low key fob battery as long as the key is inside the vehicle. However, you may need to use the physical key blade to unlock the doors.
Q: Do I need to reprogram my key fob after replacing the battery?
A: No, in most cases, you won’t need to reprogram your key fob after a simple battery replacement.
Q: What if my key fob still doesn’t work after replacing the battery?
A: If you’re still experiencing issues, there could be a problem with the key fob itself, and it may need to be inspected by a qualified BMW technician.
Need More Help?
For any assistance with your car Key Fob or any car diagnostic needs, don’t hesitate to contact us!
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