If you’ve been having a hard time starting the engine in your fifth generation (2013, 2014, 2015 and possibly also the 2016) Nissan Altima sedan and the OEM 12 volt car battery in the engine bay is a few years old, you probably need to replace it. To view my DIY instructions for the procedure (including the compatible battery “Group Size” and some replacement part numbers) click on the text link or thumbnail picture below. (The steps should be the same for both the QR25DE 2.5L I4 and the VQ35DE 3.5L V6 motors.)
2013-2015 Nissan Altima 12V Car Battery Replacement Guide
