After a couple of years of daily use, the battery inside the smart or “intelligent” key fob remote control for the keyless entry system and push button start system in an updated 2013, 2014, 2015, 2016, 2017, 2018 and 2019 Ford Flex wagon 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.
2013-2019 Ford Flex Smart Key Fob Battery Replacement Guide
