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1.9TDI PD Actuator Noise

Discussion in 'General Technical / How To' started by A3Andy, Oct 28, 2009.

  1. A3Andy

    A3Andy Member

    Aug 12, 2007
    Likes Received:
    I've just sold my A3 to my brother, but it's got a quirky noise that I want to make sure is not a major fault.

    When you let off the accelerator when there's peak boost there is a high pitched 'coooo' noise, as well as the high pressure air release noise. It sounds ridiculous but the car has always done it. Audi actually put a new turbo on recently, stating it was noisy, but it's still doing the same thing. Is this normal for the 1.9 engine?

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