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  1. AC very loud noise from engine bay

    A5 & S5 Topics
    Hi Guys, new to this forum. I've had my A5 for nearly a year now and I'm very sure it never used to be this loud outside of the car when my AC is on. I noticed recently that when I have my windows down, if the ac is on I can hear a loud humming noise from the engine bay (no matter how high the...
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