Is your car key fob starting to feel a little unresponsive? Are you pressing the unlock button multiple times before your car finally acknowledges your command? It might be a sign that your key fob battery is dying and needs replacing.
Like any battery, Key Fob Batteries wear out over time. While you could take your key fob to a dealership or auto repair shop and pay for a professional battery replacement, you can easily tackle this task yourself. Replacing your key fob battery is a straightforward DIY project that can save you time and money.
With just a few common household tools and a fresh, inexpensive battery, you can breathe new life into your car key remote. Let’s dive into how you can replace your key fob battery and get your remote working like new again.
Opening a key fob with a watch knife to access the battery compartment for replacement.
Tools You’ll Need for a Key Fob Battery Change
Before you begin, gather these simple tools to make the key fob battery replacement process smooth:
- Thin Blade or Pry Tool: A watch knife, small flathead screwdriver, or even a guitar pick can work to gently pry open the key fob case.
- Replacement Battery: Most key fobs use a CR2032 coin cell battery, widely available in stores and online. However, it’s crucial to check your key fob for the exact battery type.
- Precision Screwdriver (Possibly): Some key fobs use tiny screws to secure the case. A precision screwdriver set with sizes between 1.4mm and 2.4mm might be necessary.
- Tweezers (Optional but Helpful): Tweezers can assist in removing and inserting the small battery, especially in tight spaces.
- Smartphone Camera: Your phone’s camera is invaluable for taking pictures as you disassemble the fob, ensuring you remember how everything fits back together.
Step-by-Step Guide to Replacing Your Key Fob Battery
Follow these easy steps to replace your car key fob battery:
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Open the Key Fob Case: Carefully inspect your key fob case. Some have a small notch or seam to help you start prying it open. Use your thin blade or pry tool to gently wedge into this opening. Work your tool around the perimeter of the case, gently applying pressure to pop open the fasteners. Avoid forcing it open from just one point, as this could damage the case.
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Identify the Battery Type: Once the case is open, take a close look at the battery. Note the battery type indicated on it. Common types include CR2032, CR1632, CR2025, or CR1620. Make sure you purchase the correct replacement battery type.
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Take a Photo (Highly Recommended): Before removing the old battery, take a picture of the key fob’s internal components, especially the battery orientation (+ and – sides). This photo will be a helpful reference when you reassemble the fob.
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Remove the Old Battery: Gently remove the old battery. Some fobs have small clips or holders. Use tweezers or your fingertip to carefully lift the battery out. Take note of how the battery is positioned (positive side up or down).
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Insert the New Battery: Install the new battery in the same orientation as the old one. Ensure it’s securely placed in the battery compartment.
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Close the Key Fob Case: Carefully snap the key fob case back together. Ensure all fasteners are securely closed and the case is properly aligned.
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Test Your Key Fob: Test your key fob to ensure it’s working correctly. Try locking and unlocking your car, and starting the ignition if your fob has that function.
Store manager demonstrating the key fob battery replacement process.
Knowing Your Key Fob Battery Type
Before you even open your key fob, you might be able to determine the battery type it needs.
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Check the Key Fob Case: Some key fobs have embossed letters or numbers on the back or inside the key sleeve indicating the battery type. Look for markings like CR2032, CR1632, etc.
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Consult Your Owner’s Manual: Your car’s owner’s manual may contain information about the key fob battery type.
If you can’t find the battery type externally, you will need to open the key fob to check the battery directly before purchasing a replacement. While CR2032 is a common key fob battery, variations exist depending on your car’s year, make, and model. For example, some Honda models might use a CR1250 battery, and certain Ford Mustang fobs require two batteries.
Important Tips and Precautions
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Gentle is Key: When prying open the key fob case, be gentle and patient. Avoid excessive force, which could damage the case or internal components.
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Don’t Disturb Internal Wiring: Be careful not to touch or disrupt any wiring or circuit boards inside the key fob. Focus solely on the battery replacement.
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Static Electricity: While not always necessary, grounding yourself to discharge static electricity before handling the circuit board can be a good precaution, especially in dry environments.
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If in Doubt, Seek Professional Help: If you’re uncomfortable with DIY electronics or encounter difficulties, don’t hesitate to visit a professional at a dealership, auto repair shop, or battery center for assistance.
Get Back to Reliable Remote Access
Replacing your key fob battery is a simple and satisfying DIY task. By following these steps, you can restore the convenience of your remote car access and avoid unnecessary dealership costs. Keep your key fob working reliably and enjoy the ease of remote locking, unlocking, and vehicle control.
