How to Replace the Battery in Mazda Key FOB
How to Replace the Battery in Mazda Key FOB
Posted on March 8, 2025
So, your Mazda key fob isn’t working like it used to? Maybe it’s not unlocking the doors, or you have to press the button multiple times. That’s usually a sign that the battery is running low. No worries, though—it’s an easy fix! Let’s walk you through how to replace the battery in your Mazda key fob step by step.
Things You Need First
Before we get started, you’ll need a small flathead screwdriver, a new CR2025 battery (most Mazda key fobs use this, but check your manual to be sure), and something soft like a cloth or tape to protect the fob from scratches. Once you have everything ready, you’re good to go!
Step 1: Opening the Key Fob
Look for the small notch on the side of your key fob. That’s the spot where you’ll insert your screwdriver. To avoid scratching the plastic, wrap the tip of the screwdriver with a soft cloth or tape. Gently twist, and the two halves of the fob will pop apart. It doesn’t take much force, so go easy on it.
Step 2: Taking Out the Old Battery
Inside, you’ll see a small round battery. Pay close attention to how it’s positioned—whether the positive side is facing up or down. Using the tip of your screwdriver, carefully lift the battery out. Be gentle, as you don’t want to damage anything inside.
Step 3: Putting in the New Battery
Now, grab your new CR2025 battery and place it exactly the way the old one was. Usually, the positive side faces up, but it’s always best to double-check. Make sure it’s sitting snugly in place so it doesn’t move around.
Step 4: Snapping Everything Back Together
Once the new battery is in, align the two halves of the key fob and press them back together until you hear a satisfying click. If it’s not closing properly, check to see if the battery is fully seated inside. A quick double-check can save you some hassle later.
Step 5: Time to Test It
Now for the moment of truth—try pressing the buttons on your key fob. If the lights flash or your car responds, you’ve done it right! If it’s still not working, open it back up and ensure the battery is properly placed. Sometimes, even a tiny misalignment can cause issues
Get It Fixed at Whitby Mazda!
If your key fob still isn’t working after replacing the battery, there could be another issue, like a faulty fob or a programming problem. That’s where we come in. As the trusted Mazda dealership in Whitby, ON, we’re here to help. Just stop by Whitby Mazda, and our expert team will check it out for you. We’ll have you back on the road in no time.
Visit or contact us today, and we’ll take care of it for you!