I have one on my 606.910 too, I took it to an oldschool alternator/starter shop and asked to install the "new fangled" pulleys - he pulled out one from his shelf - it was for a SAAB/VW/??? something else too and charged me USD 85/- for the ordeal including installing it.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)