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Replacing the Key Fob Battery for the Toyota Sienta

Model: Toyota Sienta Npc80 - Years 2003-2015
Part: Key

In this guide, learn how to replace the battery in the key fob for the Toyota Sienta in simple steps. First, take the key fob and remove the physical key from inside it. Then, pry open the sides to separate the two halves of the fob, accessing the battery compartment as shown in the video. Now, replace the old battery with a new one of the correct type (in this case, a CR 2032 3V); insert it in the correct orientation and then reassemble the two halves of the fob, reinserting the key!

Updated on 22 June 2026 by ScegliAuto

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