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How to Open the Mazda Key Fob & Replace a Dead Battery

If your key fob dies while you’re out and about in Manhattan or Bronx, it can definitely leave you feeling a bit stuck. While you can always use your physical key to get in and get going on the streets of White Plains, you’ll have to learn how to open a Mazda key fob in order to change your battery!

Before learning how to change a battery in a Mazda key fob, though, you’ll need to have the following items on hand:

  1. A replacement battery on hand (CR2025 battery)
  2. Your Mazda key fob
  3. A small flat head screwdriver with the head wrapped in tape to prevent scratches

Opening Your Mazda Key Fob

Whether you drive a Mazda6 or Mazda CX-5, know that the process of opening your key fob is essentially identical across the Mazda model lineup. Here’s how to open the Mazda key fob:

  1. Press the auxiliary key button on the back of your key fob in order to remove the metal auxiliary key
  2. With the metal key gone, you’ll notice a slot on either side of the key fob case.
  3. Use the tape-wrapped flathead screwdriver to pry open the case, first on one side, and then on the other. Work gently.
  4. This should remove the case. Place the latter in an easily-visible spot where you won’t lose track of it.

Replacing Your Mazda Key Battery

Now that you know how to open a Mazda key fob, it’s time to replace the battery. Follow these steps to change a battery in your Mazda key fob:

  1. Remove the battery cap, and set it next to your key fob case.
  2. Your Mazda key fob battery should be fully exposed. Remove it, being careful not to damage the small rubber ring that it sits upon.
  3. If you scratched or damaged the rubber ring, it’s important to replace this component before moving on.
  4. With the ring in place, take your new replacement battery and set it in its place in the key fob. The positive (+) side should be up, facing you.
  5. Return the battery cover to its proper place, and then reattach both sides of the key fob case. Press until you hear them click into place.
Woman looking off to left while entering Mazda CX-9 passenger side door

Get Mazda Key Fob Assistance from Mazda of New Rochelle

Of course, if you’re not comfortable performing this task, the service team at Mazda of New Rochelle would be more than happy to help you. Schedule service, or give us a call at (914) 826-8100 to plan a visit. Also, be sure to take a look at our available Mazda service coupons to see how you can save on your next repair. Our team can even provide you with directions to New Rochelle when you’re ready to visit.

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