After a few years of daily use, the battery inside the advanced (A.K.A. “smart” or “intelligent”) key fob remote control for the keyless entry and push button start systems in a third generation (2014, 2015, 2016, 2016 & 2018) Mazda Mazda6 sedan can become weak or stop working entirely. Take a look at my DIY instructions for changing the key fob battery (including the compatible replacement part number) by clicking on the text link or thumbnail image below.
2014-2018 Mazda Mazda6 Key Fob Battery Replacement Guide
