Audi Q8 Bluetooth Phone System Dead, Mic Malfunction

Had a very similar issue with my 2021 Audi Q7. As someone with some experience working on cars, I initially tried the basic system resets but quickly realized this was beyond DIY territory. The audio system completely failed to respond to voice recognition commands, and the microphone repair turned out to be more complex than expected. The workshop diagnosed a failed control module in the infotainment system that was causing the volume control and communication features to malfunction. The ambient noise sensors were also affected, which explained why the hands-free calling stopped working altogether. The fix required replacing the main communications module and recoding the entire system. Total cost was 815 Euro including parts and labor. To better assist with your Q8, could you provide: Complete error code from system memory, Whether basic functions like radio still work, If the issue started after a software update, Whether USB connections are still functioning This information would help determine if your issue matches what I experienced with my Q7. The symptoms sound very similar, but these newer systems can have different underlying causes.

Last service was at 71179 KM. Thanks for sharing your repair experience. The error code showing in my system is U015300. The basic audio input functions like radio and media streaming still work perfectly fine. Sound quality for music playback is normal. After checking, I noticed this started right after the automatic system update last week. All USB ports are functioning correctly and can charge devices, but the system doesnt recognize any connected phones via cable either. Looking at what you described, this does sound very similar to your situation, especially with the Bluetooth issue and microphone problems. Will get it checked at the workshop, but wanted to confirm if they also had to recode your system after the module replacement?

Thanks for providing those details. Yes, your situation matches my Q7 case almost exactly, especially the timing with the system update and the specific Bluetooth issue pattern. The wireless connection problems and voice recognition failure in my case definitely required full system recoding after the module replacement. The workshop explained this was essential because the new module needed to be properly integrated with all other vehicle systems. Your error code U015300 is actually the same one my system showed, which typically indicates a communication fault between the audio system and the vehicle network. The fact that your USB ports work but cant establish data connection further supports this being a module issue rather than a simple microphone repair problem. The post-repair recoding took about an hour and included: Full system integration, Bluetooth stack reset, Audio system calibration, Voice recognition system setup One key point: make sure the workshop checks if the control module firmware is compatible with your current system version. In my case, they had to roll back a recent update to ensure stability. The total repair time was about 4 hours, and my Q7 has worked flawlessly since then with all communication features restored.

Based on this conversation, the voice recognition and Bluetooth issues you shared sound like a match to my situation. Thanks for confirming the recoding details. The error code U015300 showing up in both cases definitely points to the same communications module problem. Will schedule the workshop appointment and make sure they check the firmware compatibility you mentioned. Good point about the system rollback, will bring that up with them since my issues started right after that update. The audio system still working for basic functions while having dead volume control and microphone issues matches exactly what happened to yours. Just hoping the repair costs stay around the 815 Euro mark you mentioned. At least knowing the full diagnosis and repair process in advance helps set proper expectations for the workshop visit. Will report back once its fixed in case anyone else runs into similar problems with their Q8 voice recognition system. The communication module route seems like the right path forward rather than just focusing on the microphone repair aspect. Really helpful to know about the 4-hour repair timeline too for planning purposes.