A9124622072901_1

Technical Service Bulletin
91 Wireless Apple CarPlay / wireless AndroidAuto connection drops out at specific locations
91 24 62 2072901/1 February 7, 2024.
Model(s)
Year
All Audi Vehicles 2021 – 2025
VIN Range
Vehicle-Specific Equipment
All
Wireless Audi Smartphone Interface (ASI)
Condition
Customer states:
• Wireless Apple CarPlay (wACP) / wireless AndroidAuto (wAA) drops the connection reproducibly at certain
specific locations.
• The wireless connection can be reestablished after leaving the area.
• When using the Audi Smartphone Interface (ASI) via the USB cable, the connection is stable.
Workshop findings:
• No Relevant DTCs are stored.
• The complaint can be reproduced at the location specified by the customer.
Technical Background
The vehicle communicates with the phone via a WiFi 5 GHz connection. Due to the way WiFi operates, bandwidth
needs to be shared between all WiFi networks that are transmitting in the same frequency spectrum. In certain
areas (mostly around densely populated areas), there may be so many WiFi networks using the same frequency
range that the data throughput is severely limited, leading to a loss of connection.
Production Solution
Not applicable.
Service
You can verify the customer complaint by downloading a WiFi network analyzer app and using this to determine
the available spectrum at the location of the customer complaint.
Page 1 of 3
© 2024 Audi of America, Inc.
Internal
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
Figure 1: WiFi spectrum
If you can see multiple WiFi networks around the same channel that the vehicle is using (see the example in
Figure 1), it is likely that the customer complaint is due to that external interference.
The signal strength is not relevant in this case. Only the amount of network traffic in the same
frequency range of the vehicle matters.
Please explain to the customer that this behavior is caused by external influence and is not a quality issue with
the vehicle.
Workaround
A wired USB connection can always be used for Apple CarPlay/AndroidAuto and will be stable, even in crowded
WiFi areas. To make sure a wired connection is used, disable WiFi on your phone or unpair the wireless ASI
connection before plugging the phone into the vehicle.
Page 2 of 3
© 2024 Audi of America, Inc.
Internal
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
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All part and service references provided in this TSB (2072901) are subject to change and/or removal. Always
check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the
Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
©2024 Audi of America, Inc. All rights reserved. The 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.
Page 3 of 3
© 2024 Audi of America, Inc.
Internal
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.