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How to Replace the Key Battery of the BMW 3 Series E46

Model: BMW Serie 3 E46 - Years 1998-2006
Part: Key

If your BMW 3 Series E46 key suddenly stops working due to a dead battery, don't worry. In this quick guide, you will learn how to replace it safely and efficiently. First, locate the small cover on the back of the key and remove it. Next, unscrew the two screws with a Phillips screwdriver and take off the back cover. Finally, find the dead battery and replace it with a new, compatible one. Reattach the cover, and you're done.

Updated on 1 July 2026 by ScegliAuto

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