The iridium tipped OEM spark plugs in a second generation (2013, 2014, 2015, 2016 & maybe also the 2017) Ford Fusion sedan with the EcoBoost 2.0 liter inline four cylinder turbo engine should last up to 100,000 miles but they should be checked well before that mileage. Take a look at my DIY instructions for the procedure (including the replacement part numbers) by clicking on the text link or thumbnail image below.
2013-2016 Ford Fusion Engine Spark Plugs Replacement Guide
