If you’ve been having a hard time starting the engine in your 2012, 2013, 2014, 2015 or the revised 2016 VW Passat on a cold morning and the OEM 12 volt battery is a few years old, you probably need to replace it. Check out my DIY instructions for the procedure (with the OEM group size and compatible replacement part numbers) by clicking on the text link or thumbnail image below.