How to open a 2011 Mazda 3 key fob

I need to get inside the key fob for my 2011 Mazda 3 so that I can change the batter. But there doesn’t seem to be any way to open it. Does that fob even open?

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Answer provided by
Patrick Price
Answered on Jun 30, 2022
Yes! The fob does open, but there’s a bit of a trick to getting it open. It can be a bit tricky, but we’ll get you inside your fob in no time! Here’s what you’ll need to do to open a 2011 Mazda 3 key fob.
  • Change the key to the “out” position so that it’s pointing directly up and out of the fob.
  • Using a very small screwdriver or the end of a coat hanger, insert the end of the screwdriver into the opening on the back of the fob—the same opening that the key folds in and out from.
  • You should see/feel a little latch just below the key. Press that tab up and toward the key.
  • The piece of the fob that holds the key should pop loose when you hit the tab correctly.
  • Using your flathead screwdriver again, pry the two remaining halves of the fob apart. With the third piece already removed, the remaining haves should come away easily.
  • The battery should be clearly visible once the fob is out. Remove the old battery and replace it with a new one.
And you’re all set!
Now that you’re finished replacing the battery in your 2011 Mazda’s key fob, you might want to take a few minutes out of your day and go over your car insurance situation.
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And that’s it—you’ve successfully opened your Ford Fusion’s key fob! You should now be able to access its battery without any more trouble.

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