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How to Replace the Key Battery in the Audi A3

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

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Video tutorial

To replace the battery inside the key of your new Audi A3 mk4 (year 2020-2023), you only need a few simple steps. First, remove the physical emergency key located at the top of the cover and then use it to detach the rear cover.

Once done, locate the old, exhausted battery and remove it as well. Finally, insert the new compatible replacement battery and reattach the rear cover of the key.


Updated on 29 August 2026 by ScegliAuto


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Where are the fuses located on the Renault Laguna?

On the Renault Laguna, the fuses are located inside the fuse boxes installed in the vehicle: in this car model, you will find two boxes for containing the fuses. The first is in the fuse box on the left side of the dashboard, accessible by opening the driver's door: here you will find the fuses for the windscreen wipers, fog lights, horn, etc. The second box is located on the right side of the engine compartment: here you will find the fuses for the dipped headlights, radiator fan, alternator, etc.

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by ScegliAuto

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