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

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

This video shows the procedure for replacing the key battery on a Mazda CX-3. First, remove the emergency key. Then, using a flat-head screwdriver, pry open the two tabs. Insert the screwdriver along the edges of the key and twist to lift the edges. At this point, remove the back cover, then use your fingers to take out the battery cover and remove the battery. Now insert the new battery and close the key by pressing it together. The battery for this key is a CR2025.

Updated on 10 August 2026 by ScegliAuto

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