If you’d like to check or change the spark plugs in the Duratec 35 3.5 liter V6 engine of your 1st generation (2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 and 2019) Ford Flex SUV, take a look at my DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2009-2019 Ford Flex 3.5L V6 Engine Spark Plugs Replacement Guide
