Quote:
Originally Posted by Zheez
Tensioner would usually be making some kind of noise if it needed changing, a squeal or some other kind of noise. If you can't hear any strange noises from the belt area at the front of the engine you're probably fine.
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Tensioner can also show excessive "jiggle"/wobble before making noise as a sign it should be replaced. Mine wasnt making any noise and BMW still replaced it under warranty when i told them it looked like it was moving more than it should be just at idle.