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How to Replace the Key Fob Battery on a BMW 1 Series

Model: BMW Serie 1 MK 2, F20, F21 - Years 2011-2019
Part: Key

Replacing the key fob battery on a BMW 1 Series, as shown in this tutorial, is a very simple and inexpensive task. You will need only a replacement CR2450 3V battery. First, press the button on the back, then extract the emergency metal key and use it to lever open the indicated slot, thus opening the cover. At this point, remove the old battery, insert the replacement battery in the correct orientation, and reassemble everything by following the reverse procedure.

Updated on 17 June 2026 by ScegliAuto

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