[DrFerry]

Originally Posted by sxychubles

Here is the noise.

https://youtube.com/shorts/ZAhHy3I2EuQ?feature=share

Your S65 engine noise (if any) in the link above is much more subdued IMO than the one posted above by TechE I would go so far as to say yours is just normal S65 whirring noise with a hint of tensioner pulley(s) whine. Not a big deal IMO. People do change the belt tensioner pulleys when they become a little noisy but others put up with it until it becomes much louder than yours. Example below..
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