---
title: "2015-2019 Hyundai Sonata Key Fob Battery: CR2032"
description: "The 2015-2019 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/2015-2019/key-fob-battery"
updated: "2026-08-21"
---

# 2015-2019 Hyundai Sonata Key Fob Battery Type and Replacement

The 2015-2019 Hyundai Sonata key fob takes a CR2032 coin cell. How to open the fob without breaking it, and which substitutions actually work.

**Quick answer**: The 2015-2019 Hyundai Sonata key fob takes a CR2032 coin-cell battery, available at any pharmacy, hardware store, or online for a few dollars.

## Replacing the 2015-2019 Hyundai Sonata 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 Sonata model years does this cover?

These key fob battery specifications apply to every Hyundai Sonata built from 2015 through 2019, the LF (7th generation), mid-size sedan. Nothing in this specification changes between those model years.

- [2015 Sonata](https://whichcarparts.com/cars/hyundai/sonata/2015)
- [2016 Sonata](https://whichcarparts.com/cars/hyundai/sonata/2016)
- [2017 Sonata](https://whichcarparts.com/cars/hyundai/sonata/2017)
- [2018 Sonata](https://whichcarparts.com/cars/hyundai/sonata/2018)
- [2019 Sonata](https://whichcarparts.com/cars/hyundai/sonata/2019)

## What changed during the 2015-2019 Hyundai Sonata

| Years | What changed |
| --- | --- |
| 2015 | Generation launch on the LF platform; Eco 1.6T added |
| 2016 | Hybrid and Plug-in Hybrid trims join the lineup with the Nu 2.0L GDI hybrid powertrain |
| 2018 | Mid-cycle facelift arrives; a new mid-range SEL trim is added with Blue Link telematics, SiriusXM, HD Radio, and a power driver's seat standard (base SE and Eco lose those items as standard equipment) |
| 2018-2019 | Mid-cycle facelift: new front/rear styling, revised interior with digital instrument cluster option, Eco 1.6T dropped from some markets late in the run |
| 2019 | Final model year of the LF generation; facelifted trim lineup and styling carry over unchanged ahead of the all-new DN8 for 2020 |

## 2015-2019 Hyundai Sonata key fob battery: common questions

### What battery does the 2015-2019 Hyundai Sonata key fob take?

A single CR2032 coin cell.

### Can you use a CR2032 instead of a CR2025 in a 2015-2019 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 2015-2019 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 Sonata, seventh generation (LF) production/model-year details](https://en.wikipedia.org/wiki/Hyundai_Sonata)
- [Checkered Flag Hyundai, Sonata oil type/capacity by model year](https://www.checkeredflaghyundaiworld.com/blog/hyundai-sonata-oil-type/)
- [Lionheart Tires, Hyundai Sonata factory tire sizes by generation](https://lionharttires.com/hyundai-sonata-tires/)
- [YouTube, LF Sonata cabin air filter part number (97133-C...)](https://www.youtube.com/shorts/Cpzsf9WLPbI)
- [Filterbuy, Sonata cabin air filter location and hybrid part number](https://filterbuy.com/air-filters/cabin/by-vehicle/hyundai/sonata/)
- [NHTSA, Hyundai consent order, Nov. 2020 (Theta II engine warranty extension)](https://www.nhtsa.gov/document/hyundaiconsentorder11272020)

## Other Hyundai Sonata generations

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

Or [compare all generations](https://whichcarparts.com/cars/hyundai/sonata/key-fob-battery).

## More for the 2015-2019 Hyundai Sonata

- [Oil & filter](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/oil)
- [Battery](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/battery)
- [Tires & wheels](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/tires)
- [Wiper blades](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/wipers)
- [Air & cabin filters](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/filters)
- [Bulbs](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/bulbs)
- [Brakes](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/brakes)
- [Fluids](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/fluids)
- [Service schedule](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/service-schedule)
- [Problems & reliability](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/common-problems)
- [Oil light reset](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/oil-reset)
- [Specs](https://whichcarparts.com/cars/hyundai/sonata/2015-2019/specs)

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