A461774 2047919-

46 Rattling noises at 25 mph after pulling away
46 17 74 2047919/2 July 20, 2017. Supersedes Technical Service Bulletin Group 46 number 17-73 dated June
29, 2017 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
Q5
2018
All
Not Applicable
A4, A4
allroad, S4,
A5, A5
Cabriolet,
A5
Sportback,
S5, and Q7
2017 - 2018
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
2
-
Revised header data (Added model years)
1
06/29/2017
Initial publication
After pulling away, a slight rattling or clicking noise maybe heard from the front of the vehicle at about 25 mph. It
might be felt also slightly through the accelerator and brake pedal.
Technical Background
The ABS/ESP system performs a short self-check during which all valves of the hydraulic unit are operated at the
same time and the return pump runs briefly. This functionality ensures the pre-load of the ABS pump and the
readiness of the Pre-Sense System if required.
The self-check is necessary for a correct operation of the ABS/ESP system. The resulting noises are unavoidable.
Individually the volume of this self-check can be perceived differently. This depends on various factors such as
the general noise level in the vehicle, driving conditions, and etc.
Therefore, the volume of this self-check may be perceived differently from vehicle to vehicle.
Production Solution
Not applicable.
Page 1 of 2
© 2017 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.
Service
No repairs are necessary. The replacement of the ABS/ESP does not improve the situation and is not permitted.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
Additional Information
All parts and service references provided in this TSB (2047919) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.
©2017 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.
Page 2 of 2
© 2017 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.