A571281 2020472-

Technical Service Bulletin
57 Door handle touch sensor (Advanced Key) will not unlock vehicle
57 12 81 2020472/5 December 19, 2012. Supersedes Technical Service Bulletin Group 57 number 10-38 dated
December 1, 2010 for reasons listed below.
Model(s)
Year
VIN Range
A4
2009
All
A5 / S5
2008 - 2009
All
Vehicle-Specific Equipment
Advanced Key
Condition
REVISION HISTORY
Revision
Date
Purpose
5
-
Revised Service (Part information), Required Parts and Tools (added
parts table)
4
12/1/2010
Revised Service (Part information)
3
6/3/2010
Revised header data (Controlling TSB display in ElsaWeb)
2
2/8/2010
Revised Service (Illustrations added for clarity)
1
4/21/2009
Original publication
The following conditions may be present:
 One or more door handle touch sensors cannot be used to unlock the vehicle doors.
 Through diagnosis it has been determined that a door handle touch sensor must be replaced.
Otherwise, the vehicle locks function normally, such as when using the remote key or the interior lock switch.
Technical Background
It is possible incompatible door handle touch sensors are installed. This could be due to either the door handle
touch sensors or the Central Comfort System control unit J393 (address word 46) having been replaced
previously.
Page 1 of 3
© 2012 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
Not applicable.
Service
Remove the touch sensor from the door handle to
read the part number (Figure 1).
Figure 1. Door handle touch sensor part number.
Tip: If it becomes necessary to contact the Audi
Technical Assistance Center, the hardware version
information (Figure 2) of the touch sensor may be
requested by the consultant.
Figure 2. Door handle touch sensor version sticker.
Only door handle touch sensors with specific part number index are compatible depending on the Central
Comfort System module installed in the vehicle, as listed in the table below.
Part compatibility matrix:
Page 2 of 3
© 2012 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
Installed Central Comfort System Control Unit
Required Door Handle Touch Sensor Part
Part Number
Number
8K0 907 064X
Original part: 8K0 927 753 or 8K0 927 753C
Service part: 4G8 927 753A
8K0 907 064XX
Original part: 8K0 927 753A or 8K0 927 753B
Service part: 4G8 927 753
Tip: These part number index requirements are not specified in the ETKA parts catalog; however, always
refer to ETKA for the latest part numbers.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Required Parts and Tools
Part Number
Part Description
Quantity
4G8927753A
Door Handle Touch Sensor
As required
4G8927753
Door Handle Touch Sensor
As required
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 3 of 3
© 2012 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.