5 Simple Steps to Change Key Fob Battery

• Identify the correct battery type for your key fob
• Open the key fob casing carefully
• Remove the old battery
• Insert the new battery with the correct polarity
• Reassemble the key fob and test it

What You’ll Need to Change Key Fob Battery

Before you start, gather the necessary items to ensure a smooth process. These include:

• A new battery for the key fob (make sure you know the correct type).
• A small flathead screwdriver or coin (to open the key fob casing).
• Tweezers (optional, but helpful for handling the battery).
• A soft cloth or towel (to protect the key fob from scratches).

Steps to Change Key Fob Battery

Step 1: Identify the Correct Battery for Your Key Fob

The first step to changing the battery in your key fob is to determine the correct battery type. You can usually find this information by looking at the old battery. If it’s worn out, you can also check the owner’s manual for your key fob or search online for the exact battery model your key fob uses. Common battery types include CR2025, CR2032, and CR1632.

It’s essential to use the right size and type of battery because an incorrect one may not work or could damage the key fob.

Step 2: Open the Key Fob Casing

Once you’ve identified the correct battery, it’s time to open your key fob. This can be a bit tricky, especially if your fob doesn’t have a clear opening mechanism.

Here’s how to open your key fob:

1. Look for the seam: Most key fobs have a seam where the two halves are joined together. Use a small flathead screwdriver or a coin to gently pry the fob apart at this seam. Be careful not to use excessive force, as this can damage the plastic casing.
2. Separate the halves: Slowly and carefully separate the two halves of the key fob. Keep the parts close together so you don’t lose any small components.
3. Take note of the components: Inside, you’ll find the battery and possibly a small circuit board. Note how everything is arranged so you can put it back correctly after replacing the battery.

Step 3: Remove the Old Battery

Once you’ve opened the key fob, you’ll see the old battery inside. Use your fingers or a pair of tweezers to carefully remove the old battery from its compartment.

Be sure to note the orientation of the battery before removing it. Many key fobs have a specific side of the battery that needs to be facing up, which is important when installing the new one.

Step 4: Insert the New Battery

Now that the old battery is removed, it’s time to insert the new one. Here’s how to do it:

1. Check the polarity: Ensure that the positive side (+) of the new battery is facing up, or facing the same direction as the old battery.
2. Place the battery carefully: Gently place the new battery into the compartment, making sure it sits securely in place. You may need to use tweezers to handle it, especially if the battery is small.
3. Don’t force it: If the battery doesn’t fit, double-check the type and orientation. Forcing it could damage the key fob.

Step 5: Reassemble the Key Fob and Test It

With the new battery in place, it’s time to reassemble your key fob. Align the two halves of the casing and gently snap them back together. Make sure the fob is completely closed, with no gaps.

Once the key fob is reassembled, test it to ensure that it’s working. Press the buttons to check if the fob is locking and unlocking the doors or performing other functions. If the fob doesn’t work right away, try pressing the buttons several times, or check that the battery is correctly installed.

If your key fob has a remote start or other advanced functions, verify that all features are working.

Troubleshooting Tips

If your key fob still isn’t working after you’ve changed the battery, try these tips:

1. Double-check the battery orientation: Make sure the battery is inserted with the correct side facing up.
2. Ensure the battery is fresh: Even new batteries can sometimes be faulty. Try a different battery if needed.
3. Check for dirt or corrosion: Inspect the battery compartment for any dirt or corrosion that might be preventing a proper connection. You can clean the compartment with a soft cloth if necessary.

Conclusion

Changing the battery in a key fob is a simple and cost-effective task that can save you both time and money. By following the steps outlined in this guide, you can quickly replace the old battery and get your key fob working again in no time. It’s a great DIY project that ensures your key fob remains reliable for all your car’s security functions.

So next time your key fob starts acting up, don’t rush to the dealership. Save money and enjoy the satisfaction of fixing it yourself!