The iridium tipped OEM (original equipment manufacturer) spark plugs in a 1st generation (2015, 2016, 2017 and 2018) Jeep Renegade SUV with the Tigershark MultiAir II 2.4 liter inline four cylinder engine should last up to 100,000 miles, but they should be checked well before that mileage so that they don’t become stuck or “frozen” in the cylinder block. Check out my DIY directions for the procedure (with the compatible replacement part numbers) by clicking on the text link or the thumbnail image below.
Jeep Renegade 2.4L I4 Engine Spark Plugs Replacement Guide
