The positive crankcase ventilation or “PCV” valve in a fifth generation (2010, 2011, 2012, 2013, 2014, 2015 & 2016) Toyota 4Runner SUV should be checked every year or so and replaced every few years. Take a look at my DIY instructions for the procedure (with the replacement part numbers) by clicking on the text link or thumbnail image below.
2010-2016 Toyota 4Runner PCV Valve Replacement Guide
