After a few years of daily use, the battery inside the key fob remote control for the keyless entry system of a NMS (new midsize sedan) 2012, 2013, 2014, 2015 and the revised 2016 model year VW Passat can become weak or stop working. Take a look at my DIY instructions for the procedure (with the compatible replacement part number) by clicking on the text link or thumbnail image below.
VW Passat Key Fob Battery Replacement Guide
