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How to replace the key battery of the 2005 Toyota Prius

Model: Toyota Prius MK 1 - Years 2004-2009
Part: Key

In this new guide dedicated to your first-generation Toyota Prius (2005), you will discover how to replace the small button battery inside the key. First, fully remove the physical emergency key, then use a cross-head screwdriver to unscrew the battery holder screws. Next, remove the old battery and proceed with the actual replacement. Finally, reassemble everything correctly and test the key's functionality. If it still does not work after changing the battery, the issue may lie with the electronic component.

Updated on 18 July 2026 by ScegliAuto

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