Kia EV6 key fob battery
2 of the 5 model years listed for the Kia EV6 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.
- 2022-2023Unknown
Not confirmed yet
- 2024Smart key
CR2032
Owner's manual: ownersmanual.kia.com (checked Nov 1, 2026)
Manual text: “Replace the battery with a new battery (CR2032).”
Find CR2032 on Amazon - 2025Smart key
CR2450
FCC ID TQ8-FOB-4F81M44; TQ8-FOB-4FA1U44Two sites agree: bestkeysupply.com and transponderisland.com (checked Nov 1, 2026)
Find CR2450 on Amazon - 2026Smart key
Not confirmed yet
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.
- The gap left by the metal key usually has a pry point. A slow twist with a thin flat tool (tape on the tip saves the plastic) opens the two halves.
- Before you take the old cell out, look at its face. Put the new cell in with the same side showing, and avoid touching both faces at once.
- Snap the halves back together, slide the metal key home, and press each button, then try the start button from the driver's seat.
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.
A CR2450 is 24.5 mm across and 5.0 mm thick, much fatter than a CR2032. A thinner cell will rattle and lose contact, so buy the exact size.
Keep spare coin cells away from small children. A swallowed coin cell can burn the throat within hours; if it happens, go to an emergency room at once.