When do you change the timing belt on a 1998 Lexus ls400?

The timing belt on a 1998 Lexus LS400 should typically be replaced every 90,000 miles or every 6 years, whichever comes first. It’s essential to check the owner's manual for specific recommendations, as maintenance schedules can vary. Additionally, if you notice any signs of wear or damage, such as fraying or cracks, you should replace it sooner to prevent engine damage. Regular inspections can help ensure the timing belt is in good condition.