After a few years of daily use, the coin cell battery inside the key fob remote control of a 12th generation (2019 hatchback, 2020, 2021 & 2022 sedan) Toyota Corolla can become weak or stop working entirely. Check out the DIY instructions for changing the battery (with the part number) by clicking on the text link or thumbnail image below.
2020 Toyota Corolla Key Fob Battery Replacement Guide
