Kia Cadenza key fob battery
5 of the 7 model years listed for the Kia Cadenza have a proven battery. The most common answer is CR2032. Rows below run oldest to newest; a year can appear twice when the car came with more than one kind of key.
- 2014Smart key
CR2032
FCC ID SY5KHFNA04Two sites agree: uhs-hardware.com and energizer.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2015-2016Unknown
Not confirmed yet
- 2017Smart key
CR2032
FCC ID TQ8-FOB-4F10Two sites agree: uhs-hardware.com and energizer.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2018Smart key
CR2032
Owner's manual: manua.ls (checked Nov 1, 2026)
Manual text: “Replace the battery with a new battery (CR2032).”
Find CR2032 on Amazon - 2019Smart key
CR2032
FCC ID TQ8-FOB-4F10Two sites agree: uhs-hardware.com and energizer.com (checked Nov 2, 2026)
Find CR2032 on Amazon - 2020Smart key
CR2032
FCC ID TQ8-FOB-4F34Two sites agree: uhs-hardware.com and energizer.com (checked Nov 2, 2026)
Find CR2032 on Amazon
Changing the battery
Smart key (push-button start)
- Most push-button fobs hide a metal backup key. Press or slide its catch and draw the key out first.
- Look inside the empty key slot for a notch. Put the tip of the metal key or a small flat screwdriver wrapped in tape there and twist gently until the shell splits.
- Note which side of the old coin cell faces up (usually the side with the writing), lift it out with a plastic tool, and press the new one in the same way.
- Reassemble, refit the emergency key, and check that the car sees the fob when you press start.
Kia smart keys usually free the mechanical key with a button, and the case opens at the gap it leaves.
A CR2032 is 20 mm across and 3.2 mm thick. CR2032, CR2025 and CR2016 share the same width but not the same thickness, so a swap between them can leave a loose contact or a case that will not close.
If a child might have swallowed a coin cell, treat it as an emergency and get to a hospital right away.