As Larry said, the belt will last a long time, despite its cosmetic appearance.

But your belt-driven components on your car will eventually need replacement.

When that happens, belt removal is necessitated, so that's a good time to go ahead and replace it.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car