---
title: "Hyundai Sonata Key Fob Battery: CR2032"
description: "How the Hyundai Sonata key fob battery specification changed from 2011 to 2025, compared generation by generation. The Hyundai Sonata key fob takes a CR2032 coin cell. How to open the fob without breaking it, and which substitutions actually work."
url: "https://whichcarparts.com/cars/hyundai/sonata/key-fob-battery"
updated: "2026-08-21"
---

# Hyundai Sonata Key Fob Battery Type and Replacement

The specification is consistent across every generation we hold data for.

## Has the Hyundai Sonata key fob battery specification changed by year?

| Model years | Fob battery |
| --- | --- |
| [2020-2025](https://whichcarparts.com/cars/hyundai/sonata/2020-2025/key-fob-battery) | CR2032 |
| [2015-2019](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/key-fob-battery) | CR2032 |
| [2011-2014](https://whichcarparts.com/cars/hyundai/sonata/2011-2014/key-fob-battery) | CR2032 |

## Full specifications by generation

The key fob battery on a Hyundai Sonata is set by its generation, not its model year, so each generation has one page carrying the complete figures, part numbers and fitment notes for every year it covers.

- [2020-2025 Hyundai Sonata Key fob battery](https://whichcarparts.com/cars/hyundai/sonata/2020-2025/key-fob-battery)
- [2015-2019 Hyundai Sonata Key fob battery](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/key-fob-battery)
- [2011-2014 Hyundai Sonata Key fob battery](https://whichcarparts.com/cars/hyundai/sonata/2011-2014/key-fob-battery)

## Hyundai Sonata key fob battery: common questions

### What battery does the Hyundai Sonata key fob take?

A single CR2032 coin cell.

### Can you use a CR2032 instead of a CR2025 in a Hyundai Sonata 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 Hyundai Sonata 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

- [Wikipedia, Hyundai Smartstream engine family (G1.6T, G1.6T Hybrid, displacement/output data)](https://en.wikipedia.org/wiki/Hyundai_Smartstream_engine)
- [AMSoil lookup, 2022 Sonata 2.5L oil viscosity/capacity](https://www.amsoil.com/lookup/auto-and-light-truck/2022/hyundai/sonata/2-5l-4-cyl-engine-code-a-a/)
- [Costa Oils, 2023 Sonata 2.5L Turbo (N Line) oil guide](https://costaoils.com/2023-hyundai-sonata-2-5l-turbo-oil-change-guide-2/)
- [Hyundai Forums, N Line owner's manual 0W-30 vs. 0W-20 cap discussion](https://www.hyundai-forums.com/threads/0w-20-oil-only-one-listed.671641/)
- [Goodyear, 2024 Sonata factory tire fitments by trim](https://www.goodyear.com/en-us/vehicles/Hyundai/Sonata/2024)
- [Headquarter Hyundai, 2020 Sonata fuel tank capacity and EPA mpg](https://www.headquarterhyundai.com/research/2020-hyundai-sonata-mpg/)
- [US News, 2021 Sonata Limited 1.6T engine specs](https://cars.usnews.com/cars-trucks/hyundai/sonata/2021/specs/sonata-limited-1-6t-416162)
- [Go-Parts, 2021-2024 Hyundai/Kia 2.5L Smartstream (G4KN) oil dilution/piston-ring notes](https://www.go-parts.com/garage/engine-complete-assembly-kia-sorento-hyundai-santa-fe-hyundai-sonata-2021-2024)

## Find your exact Sonata

- [2025](https://whichcarparts.com/cars/hyundai/sonata/2025)
- [2024](https://whichcarparts.com/cars/hyundai/sonata/2024)
- [2023](https://whichcarparts.com/cars/hyundai/sonata/2023)
- [2022](https://whichcarparts.com/cars/hyundai/sonata/2022)
- [2021](https://whichcarparts.com/cars/hyundai/sonata/2021)
- [2020](https://whichcarparts.com/cars/hyundai/sonata/2020)
- [2019](https://whichcarparts.com/cars/hyundai/sonata/2019)
- [2018](https://whichcarparts.com/cars/hyundai/sonata/2018)
- [2017](https://whichcarparts.com/cars/hyundai/sonata/2017)
- [2016](https://whichcarparts.com/cars/hyundai/sonata/2016)
- [2015](https://whichcarparts.com/cars/hyundai/sonata/2015)
- [2014](https://whichcarparts.com/cars/hyundai/sonata/2014)
- [2013](https://whichcarparts.com/cars/hyundai/sonata/2013)
- [2012](https://whichcarparts.com/cars/hyundai/sonata/2012)
- [2011](https://whichcarparts.com/cars/hyundai/sonata/2011)

More Hyundai Sonata guides:

- [Oil & filter](https://whichcarparts.com/cars/hyundai/sonata/oil)
- [Battery](https://whichcarparts.com/cars/hyundai/sonata/battery)
- [Tires & wheels](https://whichcarparts.com/cars/hyundai/sonata/tires)
- [Wiper blades](https://whichcarparts.com/cars/hyundai/sonata/wipers)
- [Air & cabin filters](https://whichcarparts.com/cars/hyundai/sonata/filters)
- [Bulbs](https://whichcarparts.com/cars/hyundai/sonata/bulbs)
- [Brakes](https://whichcarparts.com/cars/hyundai/sonata/brakes)
- [Fluids](https://whichcarparts.com/cars/hyundai/sonata/fluids)
- [Service schedule](https://whichcarparts.com/cars/hyundai/sonata/service-schedule)
- [Problems & reliability](https://whichcarparts.com/cars/hyundai/sonata/common-problems)
- [Oil light reset](https://whichcarparts.com/cars/hyundai/sonata/oil-reset)
- [Specs](https://whichcarparts.com/cars/hyundai/sonata/specs)

Specifications vary with engine option, production date, and market.