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How to Replace the Key Fob Battery on an Audi A4

Model: Audi A4 B6 - Years: 2000, 2001, 2002, 2003, 2004
Part: Key

See other generations:
Video tutorial

How do you replace the battery in the key fob for an Audi A4? Let's see how to do it in this detailed video. Take your key fob and use a screwdriver to pry between the key cover and the plastic cap on top. Pry until the cap separates from the cover.

Remove the worn-out battery with a screwdriver and replace it with a new one of the same size and voltage. Reattach the cap to the key fob cover until you hear it click into place.

Check that the key fob works correctly by testing the door lock and unlock buttons.


Updated on 27 February 2026 by ScegliAuto


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