Yeah, I'm wondering what's up with Continental belts, they used to be a pretty good brand but has a few with short lifespans.

What brand are the pulleys/ tensioner?

Also, arent the main belt mechanical tensioners (AC still mechanical) superceded by the hydraulic tensioner? Whats the opinion on mechanical vs hydraulic?

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04 X5 3.0i auto
03 X5 4.6is