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How to Replace the Key Battery of a BMW X3?

Model: BMW X3 MK 2, F25 - Years: 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
Part: Key

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Video tutorial

To replace the key battery of a BMW X3, start by locating the release button on the side of the key. Press this button to extract the emergency mechanical key. Once extracted, look for a small slot or opening in the key shell. Use a small flathead screwdriver or a similar tool to gently pry and open the key shell.

Once opened, locate the battery, usually a button cell, and carefully remove it. Note the orientation of the battery to ensure you insert the new battery correctly. Insert the new battery in the same orientation as the previous one, making sure it is seated properly.

Carefully close the key shell, pressing until you hear a click that confirms it is closed correctly. Finally, reinsert the mechanical key into its housing.

Check that the key works properly by testing it on the vehicle.


Updated on 2 October 2026 by ScegliAuto


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Watch the video!


by ScegliAuto

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