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Replace the Key Fob Battery of an Audi A3

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

Replace the key fob battery of your Audi A3 by following simple steps. Take your key fob and press the metal key release button. Once the metal key is out, use a screwdriver to pry between the two covers of the key (in the space where the metal key fits). Pry until the cover opens, then, remove the worn battery with a small screwdriver, take a new one of the same size and voltage. Refit the cover on your key fob by pressing on the key case until you hear it click into place. Check the proper functioning of the key fob by pressing the buttons.

Updated on 27 February 2026 by ScegliAuto

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