Vehicle battery guide

2021 Hyundai Elantra: Key Fob Battery Replacement

The 2021 Hyundai Elantra key fob remote requires a CR2032 battery. Replacing it is a straightforward DIY task that can typically be completed in a few minutes, usually without affecting your existing remote programming.

This guide applies to the following models:

2021 Hyundai Elantra
1.6L 4 cyl SIDI 1.6L 4 cyl SIDI / Regular / Front-Wheel Drive / Automatic (AM-S7)
1.6L 4 cyl SIDI 1.6L 4 cyl SIDI / Regular / Front-Wheel Drive / Manual 6-spd
2L 4 cyl 2L 4 cyl / Regular / Front-Wheel Drive / Automatic (AV-S1)
2L 4 cyl Stop-Start 2L 4 cyl Stop-Start / Regular / Front-Wheel Drive / Automatic (AV-S1)
1.6L 4 cyl SIDI; Hybrid Hybrid / 1.6L 4 cyl SIDI; Hybrid / Regular / Front-Wheel Drive / Automatic (AM-S6)
1.6L 4 cyl SIDI; Hybrid Hybrid Blue / 1.6L 4 cyl SIDI; Hybrid / Regular / Front-Wheel Drive / Automatic (AM-S6)