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How to Replace the Battery in the Mazda CX-3 Remote

Model: Mazda Cx 3 MK 1 - Years: 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
Part: Key

Video tutorial

This guide shows how to replace the battery of the car's electronic key. The first step is to remove the emergency key from the remote and, using a flathead screwdriver, pry at the side edge to open the device. Remove the plastic cover on the battery and replace it with a new one (model CR2025). Reassemble this last piece, ensuring to reattach the seal in contact with the battery and reattach the remote cover.

At this point, the operation is complete. The tool needed for this operation is a flathead screwdriver.

If this tool is not available, the remote can also be opened using the emergency key (leaving it in its housing and turning it).


Updated on 5 May 2026 by ScegliAuto


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by ScegliAuto

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