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turbo hesitation

  1. 9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    Hi everyone. I have an '06 9-3 Aero. Over the past few months i realized a slight hesitation when trying to pass on the freeway(may be directly at the orange/red line when the turbo is kicking in?) Would anyone have ideas thoughts as what may be causing? The car has 53k miles. I admit to...