After a few years of use, the battery inside the key fob remote control for the keyless entry system of a sixth generation (2017, 2018, 2019, 2020 and probably also the 2021 model year) Hyundai Elantra can become weak or stop working entirely. Check out my DIY tutorial for the procedure (with the compatible replacement part number) by clicking on the text link or thumbnail image below.
2017-2020 Hyundai Elantra Key Fob Battery Replacement Guide
