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Audi A5 Coupe 2008 3.0TDI Manual Quattro
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Heya folks so i had this unexpected failure with my serpentine belt will attach pictures, wanna know what do you think why this happened. Full set with waterpump plastic wheels ,belt + termostat and tensioner was done at 233k kilometres now at 255 and this happened see pics. That one plastic wheelie is melted below. Before this i did swirl delete mechanically and mapped too, anything i could mess up?
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Audi A5 f5 3.0 TDI Quattro S line S tronic Virtual Cockpit Driving assist pack
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Perhaps checking the bearings of the components the serpentine belt is running through. As a failing bearing will be more resistant and resulting additional load to your belt hence the freying/snapping.

~Alex
 
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