I have a 2004 525i and the speakers started hissing, popping almost like there a short or loose connection. I can smack on the dash and console and the I drive screen will completely shut off. Anyone have any ideas?
Stop smacking the car!!! That never FIXED anything! diagnose it! turn balance and fader controls in an effort to find faulty speaker! remove speaker! test it on the bench with a known good source! then either buy a junkyard replacement or hi to Bavarian Auto Sound and buy a new set...good luck!
In my case, the hissing sound from my speakers was the head unit itself. I didn't have navigation, so it was easy to change. The physical aspect of changing it is not hard with Nav, but I think you'll have to recode a new unit.
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