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Replacing the Key Battery on a BMW 3 Series

Model: BMW Serie 3 F31, F30 - Years: 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Part: Key

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Video tutorial

Replacing the key battery on a BMW 3 Series. Let's see how to do the replacement.

Take your remote and slide the button to release the metal key. Once extracted, use the same key (screwdriver) to pry open the key cover. Pry until the two pieces separate from the cover; extract the battery with a screwdriver, and replace it with a new one (same size and voltage).

Reassemble the plastic over the key remote cover until you hear the locking click. Insert the metal key back into the remote.

Check the remote's proper functioning.


Updated on 13 March 2026 by ScegliAuto


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The toll tag holder is usually attached to the car windscreen to ensure that the toll tag functions immediately when passing through barriers. However, if you decide to remove the holder, you should follow this procedure: - Insert the toll tag into the holder; - Pull the holder inwards to detach it from the windscreen; you can use a glass scraper or a stiff plastic card to assist you; After removing the holder, it is essential to remove the adhesive from the windscreen. To remove the adhesive, we recommend using a solvent-based spray that will remove the glue without clouding the area.

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by ScegliAuto

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