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  1. Buzzing Sound from Rear Speakers Subwoofer

    E39 M5 and E52 Z8 Discussion
    Hello M5Board members, When I insert the key into the ignition, there is a loud buzzing sound emitted from the rear speakers even with the radio off. With the radio on, the buzzing is still there but not as loud. Does anyone know what this is? Is it a cut wire? A faulty DSP amp? I do not know...
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