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How to Replace the Key Battery of an Audi A3

Model: Audi A3 MK 3, 8V - Years 2012-2019
Part: Key

Does the display on your Audi indicate that you need to change the key battery? Watch this video for a detailed guide. Take your remote control and press the metal key release button. Once the metal key is open, use a screwdriver to pry between the key case and the plastic cover. Pry until the cover opens. Remove the worn battery and replace it with a new one of the same type. Refit the cover on your remote control by pressing on the key case until you hear it click into place. Check that it functions correctly.

Updated on 25 February 2026 by ScegliAuto

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