Technical Service Bulletin
91 MMI3G+ Audi connect only reaches 2G service - Telephone module replacement instructions for A6 &
A7
91 15 07 2039515/4 July 28, 2015. Supersedes Technical Service Bulletin Group 91 number 15-00 dated June 30,
2015 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A6, A7

2011 - 2013

All

Audi connect

Condition
REVISION HISTORY
Revision

Date

Purpose

4

-

Revised Condition (Updated affected areas)
Revised Warranty (Added labor time; added GFF time)

3
2

6/30/2015

Revised Condition (Updated affected areas)

5/15/2015

Revised Condition (Updated affected areas)
Revised Service (Completely revised “Software Updates” section)

The customer complains that the Audi connect online service in their 2012-2013 A6 or A7 vehicle only reaches 2G
service when in the following metropolitan areas:

State

Metropolitan Areas (including
surrounding areas)

State

Metropolitan Areas (including
surrounding areas)

Arizona

Nogales

Kentucky

Louisville

California

Los Angeles, Madera

Louisiana

Baton Rouge

Colorado

Pueblo

Missouri

St. Louis; Kansas City

Florida

Miami

Mississippi

Biloxi

Georgia

Columbus; Savannah; Griffin

New Mexico

Albuquerque

Idaho

Boise

Oklahoma

Oklahoma City

Illinois

Chicago

South Carolina

Charleston

Indiana

Indianapolis

Texas

Houston; El Paso; Laredo

Kansas

Kansas City

Virginia

Roanoke

© 2015 Audi of America, Inc.

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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
Tip: This bulletin applies only to model year 2012-2013 A6 and A7 vehicles. For other vehicles, see TSB
2039476.

Technical Background
Recently, T-Mobile (the service provider for Audi connect) has repurposed some of the GSM spectrum (3G on
2100Mhz band) to maximize 4G LTE coverage in certain metropolitan areas.
Devices that do not support 3G service on the 1900MHZ band (including MMI main units of model year 2012-2013
A6 and A7 vehicles) will only receive 2G service when the switch is completed.
The change currently only affects the markets listed above, but will affect other markets in coming years. This
bulletin will be updated to include these markets as changes occur.

Production Solution
A telephone module that supports 3G service on the 1900MHZ band was installed beginning with model year 2014
vehicles. No repairs are necessary for model year 2014 vehicles and later.

Service
The telephone module can be replaced with an upgraded module that supports the additional 3G GSM spectrum.
Tip: The upgraded telephone module will only allow 3G to be received again in markets where T-Mobile has
repurposed the GSM spectrum for 4G LTE. It will not allow Audi connect to receive 4G LTE, which is not possible
with the MMI3G+ hardware.

Before starting the repair:
• Review the Required Parts and Tools section of this bulletin.
• Obtain the telephone module retrofit kit listed in the Required Parts and Tools
section of this bulletin.
• Obtain the ZUG K0814 update on SD card listed in the Required Parts and
Tools section of this bulletin.
• Obtain the telephone driver script from ServiceNet
(ServiceNet>>AUDI>>Technician References>>Audi MMI Scripts). The file
name is MMI3GP_UMTS_Driver_Script.zip. Extract the three files to a
separate SD card. Ensure that all three files are extracted to the root location
on the SD card (do not store the files in a folder on the SD card and do not
copy the zip to the SD card; files must be extracted).
• Verify that the VAS6613 ESD work surface contains three grounding straps.
The repair cannot be completed without all three grounding straps, including
© 2015 Audi of America, Inc.

Figure 1. QR code for viewing
the video with a QR code
reader on phones and tablets.

Page 2 of 14

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
the ESD mat.

Alternatively, the video can be
• Watch the “91 MMI3G+ Telephone Module Replacement Instructions for A6 & accessed through computer
internet browsers at the link
A7” video at
provided in this bulletin.
https://audi-external.kzoplatform.com/swf/player/301 (Figure 1). (See TSB
2039206 for more information about viewing videos.)

Repair procedure:
Note:
This exchange of the telephone module should only be performed in a clean environment due to sensitive
electronics. The repair should not be performed in a workshop environment.
1. Remove the MMI main unit from the vehicle according to the instructions in the Elsa Repair Manual at:
Electrical System>>Communication>>91 Communication>>Infotainment System>>Information Electronics
Control Module 1 J794, Removing and Installing.
2. Prepare for the ESD work surface by cleaning the work area of all loose debris and then drying the area with a
towel. Doing so ensures that no debris will be rolled into the mat when it is rolled up after use, which could
cause long-term damage to the ESD work surface.
3. Place the ESD anti-static mat onto the surface. Ensure that all three grounding straps are securely strapped to
the ESD mat.
4. Ground the ESD mat by plugging the 110V
grounding strap into a wall socket or power strip
(Figure 2). If a power strip is used, it must be
plugged into a grounded wall outlet. (See attached
user instructions for VAS6613 titled “VAS6613 ESD
Workspace Guide.pdf”.)

Figure 2. VAS6613 ESD work surface grounding plug.

© 2015 Audi of America, Inc.

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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
5. Ground yourself by placing the elastic strap around
your wrist. Make sure it is securely touching your
skin. It cannot be loose-fitting or over your shirt cuff
(Figure 3).

Figure 3. VAS6613 ESD work surface grounding wrist
strap.
6. Ground the MMI main unit by placing an alligator clip
on the back, ensuring that it makes contact with the
metal housing of the main unit. The most secure
location is at the bottom of the metal bracket (Figure
4).
A foam block can be used as a spacer under the
main unit to keep the grounding strap connected
(Figure 5).

Figure 4. VAS6613 ESD work surface grounding device
clip.

© 2015 Audi of America, Inc.

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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 5. Foam block used as a spacer under the main
unit.

Warning:
Your wrist, the ESD mat, and the main unit must remain grounded during the entire process.

© 2015 Audi of America, Inc.

Page 5 of 14

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
7. Start by touching the screw driver to the ESD mat to
discharge any static that may be built up in the tool.
Next, remove the five screws that are holding the
MMI top cover in place. The two screws near the
faceplate (Figure 6, green arrows) are longer than
the others, have thread lock on them, and may
require extra effort to remove. Keep these screws
separated from the others at all times.

Figure 6. MMI main unit with screw locations for top
cover.
8. Break the white warranty seal on the back of the
main unit (Figure 7).

Figure 7. Break the white warranty seal.

© 2015 Audi of America, Inc.

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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
9. Using a flat head screw driver, your fingers or a
plastic wedge trim tool, remove the top cover by