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How to Replace the Key Battery of a Hyundai Sonata

Model: Hyundai Sonata LF - Years 2015-2019
Part: Key

If the smart key for your Hyundai Sonata has suddenly stopped working, it is very likely that the battery inside is completely flat and needs replacing. Below, you will discover how to perform this operation quickly and safely. First, press the metal button located at the top of the cover to release the physical emergency key. Next, remove the rear cover using your hands and proceed to replace the old button battery with a new one (model ECR 2032).

Updated on 29 June 2026 by ScegliAuto

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