ArnoldF1scher

Problems with sat nav and sound system in the BMW 3 Series 2001: Possible antenna faults and workshop solutions

Hello community, I have a problem with my BMW 3 Series, built in 2001, diesel. Recently, both the navigation system and the sound system have been acting up. I suspect that it could be the aerial. Has anyone ever had a similar problem and could tell me how it was fixed in the workshop? What experiences have you had? Thanks in advance for your tips and advice!

(Translated from German)

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@Milan78 wrote on
Hi, Since a few weeks ago I have been experiencing problems with my mid tone speakers, both doors as well as top front one. Suddenly they are not working anymore! At the rear everything is working fine. Carly scan shoe me this error message: B7F805 - This fault code is entered when an open circuit in the DAB L Band aerial line is detected. This check is carried out when the headunit is started and after certain diagnosis requests. Please help 🙂

This error code indicates an open circuit in the DAB L Band aerial line. This could be the reason why your mid-tone speakers are not working. The first thing you should do is check the wiring and connections to these speakers. If you can't find any visible issues, it might be a good idea to have a professional mechanic inspect the system. They can use specialized tools to test the circuit and find the exact location of the open circuit. Please keep us updated on your progress.

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