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The 2014 Mazda3 key fob uses a CR2025 battery, which can be bought from online stores or auto parts shops. When the battery begins to run out, you may need to bring the fob closer to the car for it to unlock the doors. To change the battery, you will require a new CR2025 battery and a small flat head screwdriver. Start by separating the metal key part from the remote, then carefully pry apart the two halves, beginning at the key slot. Once the fob is in two pieces, remove the inner battery cover, replace the old battery with a new one, and put everything back together by following the steps in reverse.
Can you replace the 2025 battery with a 2032 battery?
The CR2025 is the type of battery needed for a 2014 Mazda 3 key fob, and you can expect to pay around $10 for each one.