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How to Replace the Key Fob Battery for an Audi A3

Model: Audi A3 - Years: 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Key

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Video tutorial

To replace the battery in the key fob for the Audi A3, start by locating the lever or button to extract the mechanical emergency key. Remove the key, then on the back of the fob, find the small cover or lever to open the casing. Use a small flat screwdriver or a coin in the indicated slot to gently separate the two halves of the fob without damaging it. Inside, you will find the button cell battery (usually type CR2032). Remove the old battery and insert the new one, ensuring the correct polarity.

Close the casing by pressing the two halves together until they click, reinsert the mechanical key, and check that all buttons on the fob work correctly.


Posted on 31 October 2026 by ScegliAuto


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