Serpentine belts are the lifelines of the engine. It drives all major components, runs the alternator, A/C, power steering, and water pump. If it breaks, it causes failure to all of the above and your car is completely disabled.
Serpentine Tensioner Replacements
A Serpentine Belt Tensioner is designed to hold a certain amount of predetermined tension on the serpentine belt . A failing or broken tensioner can cause the serpentine belt to slip, come off, or cause a loud screeching noise. It can also prematurely cause the serpentine belt to wear out.