A4522262067132_1

Technical Service Bulletin
46 Corrosion on friction surface of steel brake disc - All models
45 22 26 2067132/1 May 23, 2022.
Model(s)
All Audi
vehicles
Year
VIN Range
Vehicle-Specific Equipment
2006 - 2023
May Merge
May Merge
Condition
Customer states:
• Rust layer on the brake disc.
AND/OR
• Noises and/or vibrations when braking.
Workshop findings:
•
Workshop can confirm the complaint.
Technical Background
• Corrosion on the friction surface can occur due to the effects of moisture and road salt, if the vehicle is
stationary for long periods or if the brakes are only used lightly on short journeys (insufficient brake
cleaning).(Figure 1 and 2).
• Also consider the following remarks:
• Brake discs are exposed to environmental influences such as water, salt, snow, and dirt.
• The brake disc material, flake graphite cast iron, is not resistant to corrosion.
• It is not possible to apply an anti-corrosion coating to the friction surfaces.
• The brake discs must be maintained according to the Owner’s Manual (remove corrosion regularly, do
not overuse by intensive braking).
© 2021 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
Figure 1: Example of excessively rusted disc brakes. Figure 2: Example of rusted disc brake surface.
Production Solution
Not applicable.
Service
• Perform an extensive test drive with several brake operations.
• With careful consideration of the traffic situation, perform 2-3 ABS stops from speeds above 50mph. In
between each stop, allow the brake components to cool by driving the vehicle for more than one minute at
speeds greater than 50mph. Do not perform ABS stops if brand new pads and/or discs are installed.
• Check that the pads make contact with the disc correctly so that they are cleaning the entire surface of
the brake disc.
• Replace brake disc and pads if the condition is not eliminated.
Warranty
This TSB is informational only and not applicable to any Audi Warranty.
© 2021 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
Additional Information
All parts and service references provided in this TSB (2067132) 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.
©2022 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.
© 2021 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.