Also, what extended warranty do you have? If it's a BMW extended warranty, depending on the level of coverage, I doubt it is covered since it's part of an audio system and not pertinent to the mechanical functioning of the car.
'06 BMW E46 ///
: '08 BMW E60 DINAN ///
M5, Interlagos Blue, SMG
DINAN Stage 2 Suspension, Exhaust, Stage III Software, Front strut braces,
Intakes, 13% Underdrive pulley, 3.91 Differential, RPI Scoops.