SupraIV handsfree microphone failure

That sounds frustrating! Has the speech recognition also stopped working? Are you noticing any issues with ambient noise cancellation, or is the volume control for the microphone acting strangely? Have you checked the wireless connection to your phone to see if that is the source of the problem? Those infotainment systems can be so finicky.

Thanks! Yes, speech recognition is also non-functional. I haven't noticed any issues with ambient noise cancellation. Regarding the wireless connection, are there specific diagnostic steps you would recommend beyond basic re-pairing?

Okay, with speech recognition also down, and you've already tried re-pairing your phone, it does sound like the infotainment system itself might be the culprit. Given the error code stored, it's probably more than a simple setting. Unfortunately, troubleshooting those systems can be tricky without the right tools. It's likely a defective microphone or connection inside the unit itself. I would suggest a workshop.

I took it to a certified workshop based on your recommendation. The diagnosis confirmed a defective infotainment system, needing replacement. The repair cost was 815€.