how often to change serpentine belt?
<answer> Approximately 4 years or 40,000 miles. <context> How often does the serpentine belt need to be replaced? Even though automotive manufacturers do not provide any mileage intervals for serpentine belt replacement, they should be changed periodically as part of an overall preventative maintenance plan. Many experts suggest replacement every four or five years or 45,000 to 50,000 miles.