The 4th bar goes away at 66.25%. 1st at 85%, 2nd at 78.75%, 3rd at 72.5%, 4th at 66.25%.For those who have lost their 4th bar on a 2016 and used leaf spy pro do remember what your SOH was when the last bar dropped? Currently at 66.9%, 73000 miles, and have until October 2025 for warranty replacement based on my in service date of October 2017.