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Replacing the Key Fob Battery for BMW 3 Series E90

Model: BMW Serie 3 E91, E90, E92 - Years 2005-2013
Part: Key

In today's guide, you will learn how to disassemble and replace the battery in the key fob of a BMW 3 Series E90. First, take your key fob and extract the key from it: insert it into the designated slot and use a sharp object to pry open the two halves of the key fob. At this point, access the battery, where you can remove the circuit board to reach the battery; use a sharp object to pry it out and replace it with a new one (usually a 2025 or 2032). Then, reassemble everything!

Updated on 8 April 2026 by ScegliAuto

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by ScegliAuto

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