Worried something is wrong with your Mazda Engine? Here is the nominal operating sounds from cold and warm startup explained. Applicable to Skyactiv-G (gasoline non-turbo) produced from 2013 - 2021. Car models that might have Skyactiv-G is Mazda 3, Mazda 6, Mazda CX-9, Mazda CX-5, Mazda MX-5 as well as Mazda CX30 Timestamp 0:00 Intro 0:17 Cold Startup and idling 1:35 Explanation of sounds 2:50 Warm Startup and idling