A4020002048266_7

40 Rumbling/creaking noises from front of vehicle while driving - A6, A7, and A8
40 20 00 2048266/7 February 6, 2020. Supersedes Technical Service Bulletin Group 40 number 18-90 dated
December 13, 2018 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
A6, A7, and
A8
2015 - 2018
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
7
-
Revised header (Updated models)
Revised Technical Background (Updated information)
Revised Service (Updated information)
Revised Warranty (Updated information)
Revised Required Parts and Tools (Added table)
6
12/13/2018
Revised Production Solution (Updated dates)
5
10/04/2018
Revised Warranty (Updated Service Number and Labor Operations)
Customer states:
 They can hear rumbling, squeaking, creaking or similar noises from the front of the vehicle while driving on
uneven roads. The noises can possibly be heard and felt in the footwell or behind the dash panel.
Workshop findings:
 The noises can be reproduced.
Page 1 of 4
© 2020 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 Background
The noises can be generated on the lower left guide in
the area of the hydro-bush. (Figure 1 – Position 7 and
8)
Figure 1. Lower left guide.
Parts such as the coupling rod (Figure 2 – Position 30)
are usually replaced by mistake, presenting no
problems.
The noises from the guide link can be transmitted into
the vehicle interior by the connection of the sub frame
on the body and are noticeable in the foot well.
Figure 2. Coupling rod.
Production Solution
Not applicable.
Page 2 of 4
© 2020 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
Replace the hydro-bush on the guide link in pairs. (Figure 1 – Position 8) according to the instructions in Elsa at
Repair Manual, Chassis >> Suspension, Wheels, Steering >> 40 Front Axle >> Lower Control Arm and Ball Joint
>> Guide link bonded rubber bushing, Removing and Installing.
If repeat repairs are necessary and the hydro-bush has already been replaced (pressed out/in), the complete
guide link has to be replaced (Figure 1 – Position 7) according to the instructions in Elsa at Repair Manual,
Chassis>>Suspension, Wheels, Steering>>40 Front Axle>>Lower Control Arm and Ball Joint>>Guide Link,
Removing and Installing.
Tip:
 Please precisely locate the source of the noise with acoustic testers.
 Check the repair history for repeated repairs.
Warranty
Claim Type:
 110 up to 48 Months/50,000 Miles.
 G10 for CPO Covered Vehicles – Verify Owner.
 If vehicle is outside any warranty, this Technical Service Bulletin is informational
only.
Service Number:
4012
Damage Code:
0020
Labor Operations:
1 Wheel remove + reinstall
4405 1900
See SRT
2 Wheels remove + reinstall
4405 2000
See SRT
1 Lower guide link remove + reinstall
4016 1950
See SRT
2 Lower guide links remove + reinstall
4016 2050
See SRT
Replace guide link mounting
4012 5550
See SRT
Replace 2 guide link mounting
4012 5650
See SRT
GFF
No allowance
0 TU
Road test prior to service procedure
0121 0002
10 TU
Road test after service procedure
0121 0004
10 TU
Diagnostic Time:
Page 3 of 4
© 2020 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.
Claim Comment:
As per TSB #2048266/7
All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.
Required Parts and Tools
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part Number
Part Description
Quantity
See ETKA
Hydro-Bush
02
See ETKA
Guide Link (only if Hydro-Bush has been replaced previously)
01 or 02
See ETKA
Fasteners, Bolts, Nuts, and Screws as needed per the Repair Manual
See ETKA/ELSA
Additional Information
All parts and service references provided in this TSB (2048266) 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.
©2020 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 4 of 4
© 2020 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.