A461340 2028420-

Technical Service Bulletin
46 S4/S5 brake noise - Repair Authorization
46 13 40 2028420/3 June 10, 2013. Supersedes Technical Service Bulletin Group 46 number 13-36 dated April 9,
2013 for reasons listed below.
Model(s)
Year
VIN Range
S4
2013
All
S5
2013
All
S5 Cabriolet
2013
All
Vehicle-Specific Equipment
Produced after Sep 2, 2012
(CW36/2012)
Produced after Sep 2, 2012
(CW36/2012)
Produced after Sep 2, 2012
(CW36/2012)
Condition
REVISION HISTORY
Revision
Date
Purpose
3
-
Revised header data (Added VIN breaks)
Revised Service (changed email address)
2
4/9/2013
Revised header data (Changed applicable model year)
Revised Service (added steps)
1
1/18/2012
Initial publication
The customer may complain of hearing a high-pitched squeal or squeak from the brake system when brakes are
used with light to moderate effort.
 The concern may occur more frequently with colder weather.
 The vehicle production date is on or after Sep 3, 2012 (Calendar Week 36/2012).
Technical Background
Changes to certain brake components were implemented in S4, S5, and S5 Cabriolet models produced as of Sep
3, 2012. To closely monitor complaints of noise on these vehicles, we are asking that you contact the Audi
Technical Assistance Center (TAC) before replacing any parts on vehicles produced after this date. This will
assist us in diagnosing any potential issues with the condition noted above.
Page 1 of 2 plus attachment
© 2013 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
Production Solution
No changes to production have been made after Sep 3, 2012, as no issue has been identified.
Service
1. Verify the customer complaint matches the Condition described at the top of this TSB. Complaints not related
to the Condition described in this TSB do not require TAC authorization.
2. Verify the vehicle’s build date is on or after Sep 3, 2012. For vehicles built before this date, see TSB 2027636.
3. If the vehicle is within the New Vehicle Limited Warranty, complete the attached Brake Noise Questionnaire.
4. Obtain a sound recording of the brake noise (a cell phone recording is acceptable as long as the noise can be
clearly identified).
5. Email the questionnaire and sound recording to: [email protected]. A sound recording is necessary to help
determine the root cause of the noise and to help resolve the concern.
6. Contact a TAC consultant before proceeding with any repairs.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with
your Parts Department and service manuals for the latest information.
Page 2 of 2 plus attachment
© 2013 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.
Questionnaire - Brake Complaint: Acoustics, Noise
Vehicle Data:
Auburn Hills
Type:
Registration Date:
Dealer:
VIN:
Milage:
Name
Auburn Hills
Engine No.:
special equipment
(tow bar, Tuning etc)
Tel.-No.:
248 754
BA ID:
Rep-Date:
Test drive:
yes
done:
Type of noise (if possible):
Customer complaint confirmed:
when does the noise occur?
forward drive:
"Moo"-noise
yes
no
where does the noise occur?
reverse:
Motorway
grinding / scraping
Squeaking
creaking
Rattling
always
light braking
stop
often
hard braking
(e.g. traffic light)
rarely
without braking
Driving bends
very rarely
emergency braking
country / A-roads
Town
Notes
Where does the noise possibly come from?
exact location, if possible:
back
don`t know
Notes
front
Noise-Level:
Does the complaint occur after standing?
no
if yes, after what time of stand still?
was the handbrake, pedal
for parking brake activated?
hours
Is the noise still present after several brakings:
no
Residual thickness of the brake pads:
%
Notes
yes
yes
no
%
Notes
Residual thickness of the brake discs:
State of the brake discs:
scores outside
o.k..
rusty
scores inside
completely scored
Hotspots
Speed (range):
from / at
mph
to
mph
Outside Temperatures (range):
F°
from / at
F°
to
Weather:
wet
weather:
dry
Snow
Type / state of roads:
rough surface
Please create a noise file!
since when does the noise occur?
from the beginning
just recently
Conditions of use?
Taxi
Driving school
Rental car
Others:
Notes:
which measures / repairs have been carried out?
repeated repairs:
yes
no
Notes:
which
cobbles
since milage
Notes
smooth surface