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mike
mike 12/25/2012
2009 Mazda CX-9 Sport 6Cyl3.7L - Engine
Engine is making a high whiny noise
High pitch whine upon acceleration
1 Answer
  • Jimm
    Jimm 12/25/2012
    Several possibilities; faulty / worn drive belt tensioner, faulty / worn / slipping drive belt, faulty / worn alternator, water pump, power steering pump bearing. Open the hood and with the engine in Park or Neutral - listen for the source of the sound.
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