If you’ve been having difficulty starting the FB25 2.5L four cylinder Boxer engine in your sixth generation (2015, 2016, 2017 and 2018) Subaru Outback on a cold morning and the OEM 12 volt car battery is a few years old, you probably need to replace it. Check out my DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.