Question about 2011 Hyundai Sonata SE 2.0T

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Does smart key need to be re-programmed after battery replacement?

Nothing - still did not work after new battery used spare smart key - not sure if it needed a battery at all

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Https://www.youtube.com/watch?v=_reliF9rQUU
HOPE THIS HELPS
IF NOT I CAN HELP YOU MORE

Posted on Nov 19, 2014

Testimonial: "Had the battery replaced at auto parts store - still didn't work - that's why I wondered if it had to be reprogrammed"

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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.

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Thanks for such a good question.

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