Afternoon everyone

Nearly got my 2011 C6 3.0 TDI Quattro up to my standard since purchase

All aux pulleys recently done inc aux belt / tensioner / crankshaft pulley + HPFP belt / tensioner ( all oem)

Noticed a grumble this morning coming from the blower motor. If you speed up the fan its obvious what is the cause.

Advise please on replacement or if this can be fixed.

I know the original is a Denso / Bosch unit.

Dont really want to replace with a cheap aftermarket as i believe its a false economy. Happy to fix if there is a known solution ??

Thank you