When to change your drive belt
“Drive belts are designed to last for between 50,000 miles and 100,000 miles”
Haynes recommends on most vehicles, that you look over the serpentine belt every time you change the oil. If the belt fails it typically isn't catastrophic, but your car will quickly overheat after a few miles without the water pump turning. You should plan on changing the belt every five years of 60,000 miles even if it looks okay. Replacements are inexpensive and they typically only require a few minutes to change.
Find info on checking the belt here - Checking the Drive Belt
All cars are slightly different, so if it is time to change your drive belt, use our before you begin checklist, and find your car for specific instructions.