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How to Replace the Key Battery in an Audi A4

Model: Audi A4 B9 - Years 2014-2024
Part: Key

Start by pressing and holding the button located on the back of the key fob for your Audi A4 to extract the physical key. Once you have removed the physical key, use a flathead screwdriver to pry off the back cover of the key fob. This will give you access to the dead battery inside. Proceed to remove the battery from the key fob, and the disassembly will be complete. To install the new battery and reassemble the key for your Audi A4, follow this procedure in reverse, and the replacement will be finished.

Updated on 29 April 2026 by ScegliAuto

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