43 Warning message in the cluster "Air suspension fault", DTC C11AFF0 is stored in the suspension
module
43 21 55 2063660/2 September 7, 2021. Supersedes Technical Service Bulletin Group 43 number 21-49 dated
June 14, 2021 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A6, A7

2019

000001 - 015385

Adaptive suspension

Condition
REVISION HISTORY
Revision

Date

Purpose

2

-

Revised Warranty (Removed test drives)
Revised Required Parts and Tools (Updated Tool)

1

06/14/2021

Initial publication

Customer states:
 The message “Air suspension: system fault” is shown in the instrument cluster.
Workshop findings:
The following DTC is sporadically logged in the suspension control module, J775 (address word 0074):
 DTC C11AFF0 (Level control pressure reservoir leak detected).

Technical Background
Incorrect air hose length around rear left wheel housing.

Production Solution
Improved air hose length around rear left wheel housing implemented into production.

Service
Before performing the repairs, follow the instructions below to verify the condition:

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© 2021 Audi of America, Inc.
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.

1.

Check whether there are irregularities in
the marked area of the rear left wheel
housing liner (Figure 1).

Figure 1. Area of possible irregularities.
2.

If there are irregularities in the marked area, follow steps 1 to 6 to correct the issue.

3.

If there are NO irregularities in the marked area, perform diagnosis with GFF and tool VAS 751 001 to
locate possible leaks/issues.

Repair:

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© 2021 Audi of America, Inc.
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.

1.

Check purple and yellow air hoses for
damage (proceed with the repair, use
only the repair kit set as described in
ETKA) (Figure 2).

Figure 2. Area to be reworked.
2.

Unclip both air hoses (Figure 2).

3.

Loosen both cable ties (Figure 2).

4.

Pull both air hoses down toward the accumulator and clip them in. Secure the hoses with a cable tie above
the clip (the distance between the vehicle body and air hoses should be less than 35 mm) (Figure 3).

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© 2021 Audi of America, Inc.
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.

Figure 3. Close-up area: location where the distance between the vehicle body and air hoses should be
less than 35 mm.
5.

Secure the air hoses again at the intended locations with cable ties.

6.

Replace the damaged wheel housing liner according to ETKA.

Warranty
Claim Type:

 110 up to 48 Months/50,000 Miles.
 G10 for CPO Covered Vehicles – Verify Owner.
 If the vehicle is outside any warranty, this Technical Service Bulletin is informational
only.

Service Number:

4382

Damage Code:

0050

Page 4 of 6
© 2021 Audi of America, Inc.
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.

Labor Operations:

Diagnostic Time:

Claim Comment:

Remove and install 1 wheel

4405 1900

See SRT with
associated
operations

Check air hose for damage

4385 0199

10 TU

Remove and install wheel housing liner

6676 1900

See SRT with
associated
operations

Repair Air Hose

4385 4199

30 TU

GFF

0150 0000

Time stated on
the diagnostic
protocol (Max 50
TU)

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

No allowance

0 TU

As per TSB #2063660/2

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.

Required Parts and Tools
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part Number

Part Description

Quantity

See ETKA

Fasteners, Bolts, Nuts, and Screws as needed per the
Repair Manual

See ETKA/ELSA

See ETKA

Wheel housing liner

01

See ETKA

Repair Kit for air channel

01

Tool Number

Tool Description

VAS751001

Air Suspension Leak Tester

Page 5 of 6
© 2021 Audi of America, Inc.
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.

Additional Information
All parts and service references provided in this TSB (2063660) are subject to change and/or removal.
©2021 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 6 of 6
© 2021 Audi of America, Inc.
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.