I had mine replaced at 56000 miles. I live up north so with the cold weather and summer time. The heat and cold will cause the rubber to expand and over time cause it to crack. It wasn’t to expensive to have them replace it. It cost me like $165 to have the dealership replace it. You can probably get the belt for like $25-30 on amazon & might take 1 to 1.5 hrs to replace it.