2015–2019 Hyundai Sonata Key Fob Battery Type and Replacement

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. Pick your year for the engines it offered, what changed that year, and the problems recorded against it.

What changed during the 2015–2019 Hyundai Sonata

• 2015Generation launch on the LF platform; Eco 1.6T added
• 2016Hybrid and Plug-in Hybrid trims join the lineup with the Nu 2.0L GDI hybrid powertrain
• 2018Mid-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)
• 2018–2019Mid-cycle facelift: new front/rear styling, revised interior with digital instrument cluster option, Eco 1.6T dropped from some markets late in the run
• 2019Final model year of the LF generation; facelifted trim lineup and styling carry over unchanged ahead of the all-new DN8 for 2020

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.