carfobbattery

Hyundai Elantra N key fob battery

1 of the 2 model years listed for the Hyundai Elantra N 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.

  1. 2022Smart key

    CR2032

    FCC ID NYOMBEC5FOB2004

    Two sites agree: uhs-hardware.com and bestkeysupply.com (checked Nov 2, 2026)

    Find CR2032 on Amazon
  2. 2023Smart key

    Not confirmed yet

Changing the battery

Smart key (push-button start)

  1. Find the small release on the edge or back of the fob and hold it while you pull out the metal emergency key.
  2. 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.
  3. 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.
  4. Reassemble, refit the emergency key, and check that the car sees the fob when you press start.

Hyundai smart keys usually have a button that releases the mechanical key; a flat tool in the gap then opens the case.

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.

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.

Other Hyundai models