A4623522054385_3
Service Bulletin Details
Public Details for: A4623522054385_3
This bulletin provides information for when the brakes creak at an almost standstill.
- 2025 - 2024 - 2023 - 2022 - 2021 - 2020 - 2019 - 2018 - 2017 - 2016 - 2015 -
Models from 2025
Models from 2024
Models from 2023
Models from 2022
Models from 2021
Models from 2020
Models from 2019
Models from 2018
Models from 2017
Models from 2016
Models from 2015
Technical Service Bulletin 46 Brakes creak at an almost standstill 46 23 52 2054385/3 September 18, 2023. Supersedes Technical Service Bulletin Group 46 number 21-25 dated February 25, 2021, for reasons listed below. Model(s) Year VIN Range Vehicle-Specific Equipment All Not Applicable All Audi Vehicles 2015 – 2025 Condition REVISION HISTORY Revision Date Purpose 3 - Revised header (Added model years) 2 02/25/2021 Revised header (Added model years) 1 03/21/2019 Initial publication Customer states: • Creaking noises when braking at almost standstill (crawling when pulling away or briefly before standstill). • Please review the audio/video example: https://audiexternal.kzoplatform.com:443/#/player/medium/1 376799528052593748?autoplay=on&embed=tru e (Figure 1). Figure 1. QR Code for supporting video. Technical Background © 2023 Audi of America, Inc. Page 1 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 Brakes creak through the stick-slip effect: • The stick-slip effect describes an undesired, jerky, and pulsating slip (transition from static to dynamic friction) of two objects moving against each other. • The stick-slip effect occurs if the static friction is clearly bigger than the dynamic friction. Example: when driving very slowly and slightly operating the brakes. • This effect occurs particularly often when lightly braking on vehicles with automatic gearbox at almost standstill. • The resulting vibrations are transmitted as vibrations via the suspension to the body where they are converted to sound waves, such as creaking noises. Note: The stick-slip effect is more noticeable in vehicles with high-performance brakes, for example: SQ5, S4, S5, S6, S7, or the e-tron, but it can be present in all vehicles. Figure 2 graphically shows the stick-slip effect. Figure 2. The stick-slip effect. Production Solution Not applicable. Service © 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 Note: The information below is a simplified explanation for Customers: This creaking noise is a physical phenomenon (stick-slip effect), which in various intensity can also be reproduced on other vehicles (normal condition) and does not reduce the braking performance. Warranty This TSB is informational only and not applicable to any Audi Warranty. Additional Information All parts and service references provided in this TSB (2054385) are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair. ©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.