Technical Service Bulletin
48 Noises from the engine compartment are heard inside the vehicle (via the intermediate steering shaft)
48 23 50 2063528/4 June 29, 2023. Supersedes Technical Service Bulletin Group 48 number 22-28 dated April
28, 2022, for reasons listed below.
Model(s)

Year

A4 allroad, A4,
and Q7

2017 – 2024

VIN Range

Vehicle-Specific Equipment

All

Not Applicable

S4, A5, A5
Cabriolet, A5
Sportback, S5, 2018 – 2024
S5 Cabriolet, and
S5 Sportback
2018 – 2019

RS 5

2021 – 2024

Q8

2019 – 2024

RS 5 Sportback
SQ7, SQ8, and
RS Q8

2019
2021 – 2024
2020 - 2024

Condition
REVISION HISTORY
Revision

Date

Purpose

4

-

Revised header (Added Model Year)
Revised Warranty (Informational only TSB)

3

04/28/2022

Revised header (Added Model Year)

2

11/06/2021

Revised Warranty (Updated Labor Operation)

Customer states:
• Noises can be heard from the engine compartment/front end when accelerating between 1500 and 2300 rpm.
The noises are described as combustion noises, or as clattering or ticking from the injectors.

Technical Background
Page 1 of 2
© 2023 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.

Technical Service Bulletin
The cause of the noise is not necessarily related to engine components.

Production Solution
Not Applicable

Service
There are multiple causes of noise being transmitted from the engine compartment to the interior of the vehicle.
A possible cause of noise being transmitted from the engine compartment is insufficient noise insulation at the
opening for the intermediate steering shaft in the bulkhead.
Therefore, check whether the sealing boot is seated correctly on
the intermediate steering shaft and on the bulkhead without any
visible gaps (Figure 1).

Figure 1. Poor sealing on the intermediate
shaft.
The noise may also be influenced by the height adjustment of the steering wheel.

Warranty
This TSB is informational only and not covered by any Audi warranty.

Additional Information
All parts and service references provided in this TSB (2063528) 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.

Page 2 of 2
© 2023 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.