A872468204471710

Technical Service Bulletin
87 Faint noise heard in cabin from air conditioning circuit
87 24 68 2044717/10 March 8, 2024. Supersedes Technical Service Bulletin Group 87 number 19-93 dated July
12, 2019 for reasons listed below.
Model(s)
Year
VIN Range
Vehicle-Specific Equipment
S6, and S7
2014 – 2018
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
10
-
Revised Service (Elimination of flushing step)
Revised Warranty (Updated Labor Operations)
9
07/15/2019
Revised Warranty (Updated Labor Operation)
Revised Required Parts and Tools (Added Tools table)
8
04/09/2018
Revised Warranty (Added 2.0 TFSI Labor Operations)
Customer states:
• A faint, high-pitched “whine” or high frequency buzzing noise is heard in the cabin when the air conditioning is
set to “Low”, and the fan speed is no higher than 2. The audio system must be off and there should be no
other noises in the cabin, otherwise, the noise may not be heard.
Technical Background
This noise can be created due to an anomaly in the acoustic characteristic in the refrigerant circuit under these
specific settings (air conditioning set to “Low”, and fan speed no higher than 2). There is no technical fault with the
air conditioning system and no functional issue with the climate control system.
Production Solution
Not applicable. The refrigerant circuit architecture in the S6 and S7 models to which this bulletin applies is no
longer in production.
Service
© 2024 Audi of America, Inc.
Internal
Page 1 of 5
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
The noise symptom must be readily duplicated before any repair is performed. Ask the customer to
duplicate the noise symptom for the technician to ensure that the repair resolves the customer’s specific
concern.
If the noise cannot be duplicated, do not perform any repair to the vehicle. If the noise can be duplicated
consistently, proceed as follows:
1. Replace the low side refrigerant line that
connects the air conditioning compressor suction
port to the hybrid refrigerant line to the expansion
valve (Figure 1). Be certain to use new O-rings at
these and all refrigerant circuit joints that are
disconnected.
Figure 1. The low side line that needs to be
replaced.
© 2024 Audi of America, Inc.
Internal
Page 2 of 5
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
2. Install the balance weight (part number
4G0513621A) with 2 bolts (part number
N 10653601) to the line in the position shown in
the illustration (Figure 2).
Figure 2. Balance weight position on the low side
line.
3. No additional air conditioning components need to be replaced. Recheck the air conditioning system
under the same settings used to duplicate the noise symptom and confirm that the noise issue is
resolved.
Warranty
Claim Type:
• 110 Up to 48 Months/50,000 Miles.
• G10 for CPO Covered Vehicles – Verify Owner.
• If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Service Number:
8745
Damage Code:
0020
Labor Operations:
Compressor / evaporator line remove
and reinstall
8745 1921
See SRT with
associated
operations
Diagnostic Time:
GFF
No allowance
0 TU
Road test prior to the service
procedure
No allowance
0 TU
Road test after the service procedure
No allowance
0 TU
© 2024 Audi of America, Inc.
Internal
Page 3 of 5
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
Claim Comment:
As per TSB 2044717/10
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
4G0260707X
Air conditioner hose, low side (Compressor to
coaxial line)
01
Use appropriate part number for the hose
according to the VIN in ETKA
4G0513621A
01
Balance Weight
N 10653601
02
Bolt
Tool Number
© 2024 Audi of America, Inc.
Internal
Tool Description
Page 4 of 5
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
ROB134APF
Robinair A/C Service Unit
Additional Information
All parts and service references provided in this TSB (2044717) are subject to change and/or removal.
©2024 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.
© 2024 Audi of America, Inc.
Internal
Page 5 of 5
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.