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How to Replace the Key Battery of the Audi A3?

Model: Audi A3 MK 2, 8P - Years 2003-2013
Part: Key

In the attached video, you can see how to open the remote control of the Audi A3 and change the flat battery. This is a very simple and quick operation. You will need a flathead screwdriver and, of course, a replacement battery, model CR2032, 3V. To open the remote, start by extracting the key by pressing the small button. There is a slot on the metal ring; insert the screwdriver into it and lever to unclip the rear cover. Once loosened, fully open it with your hands, and you will have the battery ready to be replaced, ensuring the correct polarity.

Updated on 29 April 2026 by ScegliAuto

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by ScegliAuto

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