Having some stereo problems with the X5. It's got the base business CD player. The radio appears to work fine. It will let you change radio stations, put a cd in and eject it and everything like that but nothing plays through the speakers. They started crackling a little one day but then the next day they don't do anything except lightly pop. No real sound comes out or anything. I'm thinking it's the factory amp but not real sure. Any ideas on what it could be or if it is the amp where I could get a new one?

Thanks for the help guys.

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2003 BMW X5 3.0i