Serpentine belt, tensioner: problems, signs of wear, when to replace, noises

What are the signs of a bad serpentine belt? What happens if a serpentine belt breaks? What are the common problems that can cause a serpentine belt to squeal, come off or shred? When should the belt be replaced?

Knowing in depth the serpentine belt tensioner - I. Dolz

Seek the squeak and reveal the squeal

Serpentine belt, tensioner: problems, signs of wear, when to replace, noises

Serpentine Belt - When To Change?, Page 2

Tell-tale Signs That Your Engine Is Due for Serpentine Belt Maintenance

When to Replace a Serpentine Belt

EnginePower: How To Change Out A Serpentine Belt And Idle Pulley

How to Tell when an Idler or Tensioner Pulley Needs to be Replaced