How much is a serpentine belt for a 2000 Ford Taurus?
The average cost for a Ford Taurus serpentine belt replacement is between $94 and $106. Labor costs are estimated between $46 and $58 while parts are priced at $47. via
How do you change a belt on a 2000 Ford Taurus? (video)
What makes a serpentine belt keep coming off?
The serpentine belt need constant tension on the belt to keep it from coming off. If the belt alignment is not aligned then the belt may come off. The tensioner may be out of alignment and not putting enough tension on the belt. Have a mechanic check the tensioner and replace it if needed. via