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How to Replace the Key Battery on the Mazda CX-3

Model: Mazda Cx 3 MK 1 - Years 2015-2023
Part: Key

Replacing the battery in your Mazda CX-3 key is very simple, and with this mini guide, you will complete the entire operation in just a few seconds. First, locate and press the small button on the back of the cover to remove the emergency key. Then, fully open the key (you can use a flat screwdriver to assist) and proceed to remove the old battery. Once done, insert the new battery (model CR2025) and correctly reassemble the cover. Finally, test the operation of your key.

Updated on 18 July 2026 by ScegliAuto

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