You replaced timing belt in Lexus es 300 with 124000 miles when is the next replacement interval?

According to the manufacturer's recommendations, the timing belt on a Lexus ES 300 should be replaced every 60,000 miles or 5 years, whichever comes first. Since you replaced the timing belt at 124,000 miles, the next replacement interval would be at 184,000 miles or 15 years from the date of replacement, whichever comes first.