The OEM iridium tipped spark plugs in a 9th generation 2016, 2017, 2018, 2019, 2020, 2021, 2022 and 2023 GM Chevrolet Malibu with the Ecotec LFV turbocharged 1.5L I4 engine should be changed every 60,000 miles. To view the DIY tutorial for the procedure (with the compatible replacement part numbers), click on the text link or thumbnail image below.