99% certain to be the alternator pulley and as per other advice on here, you need to change it urgently or other damage will follow & that could be expensive engine damage.
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V70 D5 eu4 manual M66 2006 > XC90 brake conversion, stage 2 VDASH remap.
BMW R1200GS
BMW R1100GS
(GS Addict)
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