Technical Service Bulletin
91 Bluetooth call quality (A5 Cabriolet, TT Roadster)
91 14 32 2036795/1 April 8, 2014.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

TT Roadster

2013

005437 - 999999

Bluetooth®

TT Roadster

2014 - 2015

All

Bluetooth®

A5 Cabriolet

2013

005352 - 999999

Bluetooth®

A5 Cabriolet

2014 - 2015

All

Bluetooth®

Condition
Customer complains that during Bluetooth calls, the person at the other end has trouble hearing the speaker in the
vehicle.

Technical Background
Ambient noise affects the quality of Bluetooth calls.

Production Solution
Not applicable.

Service
1. Confirm with the customer that the issue is noticed when all of the windows and the convertible top are closed.
• If the issue is only noticed when the windows and/or convertible top are open, it is likely due to wind/road
noise, and proceeding with this bulletin is not necessary. Advise the customer to close the windows and/or
convertible top when making Bluetooth calls to improve call quality.
• If the issue is noticed when all of the windows and the convertible top are closed, proceed to step 2.
2. With all windows and the convertible top closed, climate control off, and the vehicle stationary, pair a known
good Bluetooth phone to the vehicle. Use it to call a landline.
• If the call quality sounds fine to the person on the landline, then there is no issue with the microphone.
Proceed to step 3.
• If the call quality does not sound fine to the person on the landline, perform diagnosis of the system outside
of this TSB.

© 2014 Audi of America, Inc.

Page 1 of 2

All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of
Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior
expressed written permission of the publisher.

Technical Service Bulletin
3. Talk to the customer to determine what driving conditions cause the issue to occur. Re-create the conditions
and place a test call to a landline. If the customer complaint can be verified, attempt to isolate the cause of the
interference, then address it. Pay special attention to the following:
• Excessive road noise caused by uneven tire wear or road surfaces.
• Excessive wind noise from exterior accessories or vehicle damage.
• Excessive wind noise from air entering the cabin (through seals, door adjustment, top adjustment, etc.).
• Noise from above the interior lamp assembly. Lower the lamp assembly and listen for noises that can be
amplified in the area behind the microphone. Check for loose components and ensure that the microphones
are securely fastened.
• Excessive noise from loose components, such as the door seal, headliner, lamp assembly, etc.
4. If the complaint could not be verified in step 3, the issue may be with the customer’s phone. Troubleshoot the
customer’s phone by trying the following:
• Delete all Bluetooth profiles from the customer’s phone and from the vehicle.
• Perform a power cycle on the customer’s phone and perform a three-finger reset on the vehicle radio.
• Re-pair the phone to the system.
If the issue is still present, advise the customer to contact the cellular provider for hardware diagnostics.

Warranty
This TSB is informational only and not applicable to any Audi warranty.

Additional Information
All parts and service references provided in this TSB (2036795) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.

© 2014 Audi of America, Inc.

Page 2 of 2

All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of
Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval
system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior
expressed written permission of the publisher.