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Serpentine belt noise. on 2008 Volkswagen Jetta

Took my car in for a fuel line recall & noise problem around the serpentine belt area. Dealer did a sound diagnostic test & said that the tensioner pulley located underneath alternantor was going bad and that both idler pulleys and another tensioner pulley where also going bad. Had both upper & lower idler pulleys replaced & tensioner pulleys replaced by a VW Dealer. Still getting that whizzzing noise somewhere near the AC or Alternator. Any suggestions of what might be causing the noise? Please help.

Asked by for the 2008 Volkswagen Jetta
I would take it back to the dealer and make them explain/warranty why there diagnosis didn't fix in the first place. After all they replaced everything but the kitchen sink.
1 more answer
The work would have had nothing to do with the recall. The 20I4 campaign is to remove a tab from the washer res. that has the potential to rub the plastic fuel line. Have them check the pulley on the alternator or the a/c compressor clutch.