After a few years of daily use, the coin cell inside the “smart” or “intelligent” key fob remote control for a 2nd generation 2016, 2017, 2018, 2019, 2020 and 2021 Mazda CX-9 can become weak or stop working entirely. Check out the DIY tutorial for the procedure (with the compatible replacement part number) by clicking on the text link or thumbnail image below.
2016-2021 Mazda CX-9 Key Fob Battery Replacement Guide
