The iridium tipped OEM spark plugs in a tenth generation (2014, 2015, 2016, 2017 & 2018) GM Chevrolet Impala with the Ecotec LKW 2.5 liter DOHC inline four cylinder engine can last up to 100,000 miles but they should be checked before that time. Check out my DIY tutorial for the procedure (with the compatible replacement part numbers) by clicking on the text link or thumbnail image below.
2014-2018 Chevrolet Impala 2.5L Engine Spark Plugs Replacement Guide
