2021–2025 CN7 (7th generation)
2021–2025 Hyundai Elantra Key Fob Battery Type and Replacement
The 2021–2025 Hyundai Elantra key fob takes a CR2032 coin cell. How to open the fob without breaking it, and which substitutions actually work.
Last verified
Quick answer
The 2021–2025 Hyundai Elantra key fob takes a CR2032 coin-cell battery, available at any pharmacy, hardware store, or online for a few dollars.
Replacing the 2021–2025 Hyundai Elantra key fob battery
- Pry the fob open gently at the seam with a small flathead screwdriver or a coin, working around the edge. Many fobs have a hidden release slot near the key ring or emergency-key blade.
- Note the battery orientation (usually positive side up) before removing the old cell.
- Avoid touching the new battery's faces with bare fingers; skin oils can shorten its life.
- If the fob doesn't work after replacement, check that the battery is seated fully and the contacts weren't bent. Most vehicles do not need re-pairing after a battery change.
Which Hyundai Elantra model years does this cover?
These key fob battery specifications apply to every Hyundai Elantra built from 2021 through 2025 — the CN7 (7th generation), compact sedan. Nothing in this specification changes between those model years. Pick your year for the engines it offered, what changed that year, and the problems recorded against it.
What changed during the 2021–2025 Hyundai Elantra
- 2021CN7 generation launch; 2.0L MPI, Hybrid, and 1.6T N Line all available at launch
- 2022Elantra N added (2.0L turbo, 276 hp); manual or 8-speed wet DCT
- 2023–2024Facelift with revised front fascia and updated infotainment; N gets minor suspension/software tweaks
- 2025Carryover year; Elantra Hybrid continues into the following model year per Hyundai's 2026 lineup
2021–2025 Hyundai Elantra key fob battery: common questions
What battery does the 2021–2025 Hyundai Elantra key fob take?
- A single CR2032 coin cell.
Can you use a CR2032 instead of a CR2025 in a 2021–2025 Hyundai Elantra key fob?
- This fob takes a CR2032, so start there. The two cells share a 20 mm diameter but differ in thickness, and the thicker one does not always seat in a housing built for the thinner.
How do you open a 2021–2025 Hyundai Elantra key fob?
- Slide out the mechanical emergency key first, which usually releases a catch, then part the halves with a plastic pry tool or a coin wrapped in tape. A screwdriver will mark the case and can crack the seam.
Sources
- Ontario Hyundai, Elantra oil type & capacity by model year (2021–2026 engines)
- AMSOIL lookup, 2022 Elantra 2.0L Smartstream MPI oil spec/capacity
- AMSOIL lookup, 2022 Elantra 1.6L Hybrid oil spec/capacity
- AMSOIL lookup, 2022 Elantra N 2.0L Turbo oil spec/capacity
- OilShop.ca, 2025 Elantra N oil type, capacity, filter
- Konig Wheels fit check, Elantra N factory wheel/tire fitment (245/35R19, 5x114.3)
- Michelin USA, Elantra N tire sizes and pressures
- Paragon/EBay, Elantra N 360mm front brake rotor OE diameter
- NHTSA recall 22V-123/22V-218/22V-354, seat belt pretensioner explosion risk
- NHTSA recall 24V-879, rearview camera failure
- NHTSA recall 24V-308, EGR valve electrical short
- fueleconomy.gov, 2022 Elantra EPA ratings (all trims incl. Hybrid, N)
- Edmunds, 2022 Elantra Hybrid specs (curb weight, fuel tank, mpg)
- Cabin air filter 97133-L1000 fitment (2021–2022 Elantra)