2017 Volvo XC90 manufacturing defect where panoramic sunroof drainage network fails under normal rain, pooling water directly in the floorboard channels over safety module networks and wire harnesses.Water infiltration caused a catastrophic short-circuit of the floorboard-mounted amplifier while driving. This forced the audio system to emit an un-modulated, maximum-volume electronic blast through the cabin, causing severe driver distraction and documented temporary acute acoustic trauma/ear injuries to myself and my young child.Progressive electronic oxidation from ongoing water intrusion has since caused systemic failures of critical safety electronics. This includes spontaneous, unprompted activations of the automated emergency SOS calling network and dangerous operational delays in the backup camera engaging.Dealership service personnel inspected the vehicle and explicitly warned that the water-logged electrical networks are heavily compromised and at imminent risk of a complete blackout while in motion, posing a severe threat of sudden loss of power steering, braking, and propulsion on the highway. Rain is currently actively dripping from the interior ceiling onto passenger cabin components. This platform-wide engineering flaw creates an active fire, electrical, and crash hazard.