Question about 2006 Toyota Prius

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Smart key remote is slow acting and will not allow starting up the vehicle. Can the battery in the Smart key be replaced; and how? Does it have to be re-programmed?

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Hello. Great question.

Yes, the battery can be the culprit, and it is easily changed.

Remove the metal key from the side of the smart key, and then split the casing of the smart key, via the slot. There is a small circular battery that you can remove and replace. Use the exact same battery.

No Re-programming is necessary. The smart key frequency is coded to the car. Changing the battery does not change the frequency.

Thanks for such a good question.

Posted on Dec 31, 2009

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Posted on Jan 02, 2017

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Principles of Operation
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