Audi TT Bluetooth Dead: Microphone Issues Revealed

Having dealt with a very similar issue on my 2014 Audi TTS, I have some experience with these infotainment problems. The voice recognition and Bluetooth connectivity completely failed in my case as well. After basic troubleshooting like resetting the MMI system and clearing Bluetooth pairings did not help, I took it to a workshop. They diagnosed a defective control module in the infotainment unit that was causing the audio input and volume control issues. The entire unit needed replacement since individual components could not be repaired. The total repair cost was 815 Euro, which included: New MMI control module, Programming and coding, System testing Before you proceed with repairs, could you share: Have you tried resetting the MMI system? Does the volume control work normally for radio and media? Are there any other error messages besides the Bluetooth issue? Which MMI version is installed in your TT? This information would help determine if you are facing the same underlying problem. While the symptoms match my experience, earlier or later production models might have different hardware configurations that could affect the repair approach. The sound quality issues are typically a reliable indicator of hardware failure rather than just a software glitch, especially when multiple phones show the same behavior.

I had my last service at 50000 KM and can verify the ambient noise during calls has become much worse since then. My microphone repair is scheduled for next week, as the speech recognition system completely fails to pick up voice commands now. The wireless connection drops constantly even after multiple resets. The error code shows up consistently when trying to use any audio input functions. I did attempt the MMI reset and cleared all paired devices as suggested, but no improvement. The system definitely needs proper diagnosis since basic troubleshooting has not resolved the connectivity problems. Thanks for explaining the repair costs, though concerning, it helps set realistic expectations about the potential expense involved.

The control module diagnosis from my previous TTS repair matches what you are describing. Poor voice recognition and dropped wireless connections point to failing audio input hardware, similar to what I experienced. Those symptoms, ambient noise issues and complete speech recognition failure, are classic signs of a degrading microphone unit. After 50000 KM, this is a fairly common wear point for the audio system components. In my case, clearing error codes and resetting connections provided only temporary fixes before the voice recognition problems returned. The workshop confirmed the microphone repair required accessing components behind the headliner. The audio input section of the control module had failed permanently. The final repair cost was actually higher than initially quoted since they found additional wiring damage affecting the voice recognition circuit. If your system shows the same error codes, be prepared that the fix might involve more than just the microphone unit. Some points to discuss with your workshop: Have them check the wiring harness condition, Request testing of the complete audio input chain, Verify if the latest software update is installed This should ensure they address all potential issues affecting the speech recognition system during the scheduled repair.

Thank you for sharing your repair costs. After hearing about the similar experiences, I am more confident the workshop will be able to properly diagnose my audio system issues next week. The speech recognition system in my TT has clearly deteriorated beyond what basic troubleshooting can fix. The wireless connection drops and poor sound quality during calls persist regardless of which phone is paired. Since the audio input problems emerged gradually after the 50000 KM service mark, component wear does seem to be the likely culprit. I will make sure to ask the workshop about checking both the wiring harness and complete audio input path as suggested. While the potential repair costs are higher than expected, restoring proper Bluetooth functionality and voice controls is worth the investment rather than continuing with an unreliable system. I appreciate the detailed technical feedback and repair insights shared here. This helped set realistic expectations about the scope of work likely needed to resolve these connectivity issues.