A4023672047920_7

Technical Service Bulletin
40 Noises from the front end and dash panel, noise is heard when the vehicle is moving
40 23 67 2047920/7 August 8, 2023. Supersedes Technical Service Bulletin Group 40 number 22-45 dated July
13, 2022, for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
All Audi Vehicles 2020 – 2025
Condition
REVISION HISTORY
Revision
Date
Purpose
7
-
Revised header (Added model years)
Revised Warranty (Updated Labor Operations)
6
07/13/2022
Revised header (Added model years and models)
5
07/13/2020
Revised Warranty (Added Labor Operations)
Customer states:
• There is a buzzing, booming, humming, whistling, or a similar noise from the front end.
• The noises can possibly be heard from the steering area or behind the dash panel.
• The noises may also suspected to be tire rolling noises.
Workshop findings:
• The noises can be reproduced in a test drive.
Technical Background
Mechanical damage on the wheel bearing of the front axle.
Production Solution
Not applicable.
Service
The noises from the wheel bearing can be transmitted via the steering into the vehicle interior.
Because of the close proximity, it can be difficult to distinguish them from rolling noises.
© 2023 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
Therefore, with such noises, check whether the wheel bearings of the front axle may be the source and replace
the affected component. The following steps are helpful:
1. Does the frequency issue rise as the speed increases or does the sound get higher?
2. Does the noise get louder when steering?
3. Is the noise still present when slowing down?
4. Is the noise amplified on the steering wheel/airbag well?
5. Can the vibrations be felt on the unpressed coil spring when the wheel is turning?
6. When swapping around the wheel bearings, does the noise move with a particular bearing?
Tip: Please precisely locate the source of the noise with acoustic testers. It is possible that a noise
perceived on the left side of vehicle is caused by the right wheel bearing. The front wheel bearings should not be
replaced in pairs.
If the cause of the noise cannot be traced to a wheel bearing, continue the analysis on other components.
Warranty
Claim Type:
• 110 up to 48 Months/50,000 Miles.
• G10 for CPO Covered Vehicles – Verify Owner.
• If vehicle is outside any warranty, this Technical Service Bulletin is
informational only.
Service Number:
4057
Damage Code:
0020
Labor Operation:
Replace wheel
bearing
4057 5550
See SRT with
associated operations
Diagnostic Time:
GFF
No allowance
0 TU
Road test prior to
service procedure
0121 0002
10 TU
Road test after service 0121 0004
procedure
10 TU
Claim Comment:
As per TSB 2047920/7
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
© 2023 Audi of America, Inc.
Page 2 of 3
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
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part Number
Part Description
Quantity
See ETKA
Wheel bearings
1
See ETKA
Fasteners, Bolts, Nuts, and Screws as needed per the
Repair Manual
See ETKA/ELSA
Additional Information
All parts and service references provided in this TSB (2047920) are subject to change and/or removal.
©2023 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.
© 2023 Audi of America, Inc.
Page 3 of 3
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.