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Yes could be quite common... I don't usually drive with windows down, and didn't know that my car produces this ticking noise until a friend of mine noticed it being outside when I drove off. So it took almost a year after purchasing the vehicle to discover this unpleasant "surprise".
Anyway this isn't normal situation and should be resolved. Planning to have wastegate calibration/measurements via ISTA+ later today, and (if needed) adjust the wastegate rod length. Some say it helps (especially at N20/N26 engines). Let's see what I'll get.
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