Is your car key fob starting to feel a little… unresponsive? Do you have to press the buttons multiple times to lock or unlock your doors? It might be time for a car key fob battery change. Like any battery, the one in your key fob wears out over time. Before you rush to a dealership or repair shop, you should know that you can easily change the battery in your car key fob yourself. This simple DIY task can save you time and money.
Changing your car key fob battery is a straightforward process, much easier than replacing your car battery. With just a few common household tools and the right replacement battery, you can breathe new life into your key fob in minutes. Let’s dive into how you can change your car key fob battery and get your remote working like new again.
Tools You’ll Need to Change Your Key Fob Battery
To successfully change the battery in your car key fob, gather these simple tools before you begin:
- Small Flathead Screwdriver or Watch Knife: This will help you gently pry open the key fob casing. A watch knife or a very thin blade is ideal to avoid damaging the plastic.
- Replacement Battery: The most common type is a CR2032 coin cell battery, but it’s crucial to check your key fob for the exact type needed. We’ll discuss how to find this out shortly.
- Precision Screwdriver Set (1.4mm – 2.4mm): Some key fobs use small screws to secure the casing, so a precision screwdriver set will be necessary.
- Tweezers (Optional): Tweezers can be helpful for removing and inserting the small battery, especially in tight spaces.
- Your Smartphone Camera: This is an important tool for taking pictures as you disassemble the fob, ensuring you can put it back together correctly.
Step-by-Step Guide to Change Your Car Key Fob Battery
Follow these steps to easily replace your car key fob battery:
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Prepare Your Workspace and Tools: Find a clean, well-lit area to work. Gather all your tools and the replacement battery. Having everything ready before you start will make the process smoother.
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Open the Key Fob Casing: Carefully inspect your key fob for any screws. If you see screws, use the appropriate precision screwdriver to remove them and set them aside in a safe place. If there are no screws, look for a small notch or seam on the key fob casing. This is where you’ll use your flathead screwdriver or watch knife. Gently wedge the tool into the notch and twist or pry to start opening the case. Work your way around the seam, gently prying until the case separates. Avoid forcing it open at just one point, as this could damage the casing.
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Identify the Battery Type: Once the case is open, carefully look at the battery compartment. Often, the battery type is printed directly on the old battery itself. Common types include CR2032, CR2025, CR1632, and CR1620. Make a note of the battery type. If you can’t see it on the battery, check inside the key fob casing for any markings or refer to your car’s owner’s manual.
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Remove the Old Battery: Depending on the design of your key fob, the battery might be held in place by small clips or pressure. Use your fingers or tweezers to gently remove the old battery. Pay attention to the orientation of the battery – note which side is facing up (positive side). Sometimes there’s a “+” symbol indicating the positive side.
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Insert the New Battery: Take your new battery and install it in the same orientation as the old one. Make sure the positive (+) side is facing the correct direction, matching how the old battery was placed. Press the battery firmly into place until it’s securely seated in the compartment.
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Close the Key Fob Casing: Carefully align the two halves of the key fob casing and snap them back together. If you removed screws, replace them and tighten them gently. Ensure the case is fully closed and there are no gaps.
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Test Your Key Fob: Press the buttons on your key fob to test if it’s working. Try locking and unlocking your car doors, and if your car has a panic button, test that as well. If everything works, congratulations, you’ve successfully changed your car key fob battery!
Helpful Tips for a Smooth Key Fob Battery Change
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Check Your Key Fob First for Battery Size: Before you even open your key fob, check the back or inside the key sleeve for any embossed letters or numbers. Sometimes, the battery type is indicated directly on the fob itself. This can save you a trip back to the store if you buy the wrong battery.
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Take Pictures as You Disassemble: Car key fobs can have intricate internal components. Before you remove the old battery, take a picture with your smartphone. This photo will be a valuable reference when you’re putting everything back together, especially for noting the battery orientation and the placement of any small parts.
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Handle the Internal Components with Care: Once you have the key fob open, be careful not to disturb any of the internal wiring or the circuit board. Focus solely on removing and replacing the battery. Avoid touching any other components unless necessary. The circuit board is what keeps your key fob programmed to your car, so you don’t want to accidentally damage it.
Changing your car key fob battery is a simple and rewarding task that any car owner can accomplish. By following these steps and taking your time, you can avoid unnecessary dealership visits and keep your key fob working perfectly. Remember to always double-check the battery type and handle the delicate components inside your key fob with care.
