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How to Replace the Remote Battery in the Audi A3?

Model: Audi A3 MK 4, 8Y - Years: 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Key

Video tutorial

As shown in this tutorial, replacing the remote battery in the Audi A3 is an extremely simple and quick task. You will need a replacement CR2032 battery and, if necessary, a small flat-head screwdriver.

First, extract the emergency metal key by pressing the designated button, then unlock the rear cover by prying with the screwdriver in the indicated slot. Once done, you can remove the old battery, position the replacement ensuring the correct orientation, and reassemble everything.


Updated on 29 June 2026 by ScegliAuto


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