94 Headlight moisture accumulation
94 17 86 2030960/2 February 14, 2017. Supersedes Technical Service Bulletin Group 94 number 12-89 dated
September 25, 2012 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A8

2011 - 2012

All

Not Applicable

A8

2013

000001 – 008813

Not Applicable

Condition
REVISION HISTORY
Revision

Date

Purpose

2

-

Revised Warranty (Corrected TU and updated Labor Operations)

1

09/25/2012

Initial publication

Customer states:
 Condensation is visible on the inside of the headlight lens.
 The condensation disappears only after extended drives (greater than 10 minutes).

Technical Background
Humid air settles on the inside of the glass, causing moisture to appear on the inside of the headlight
lens. Because of the headlight circulation system, outside air is allowed to flow through the headlight. The open,
water-protected ventilation system (needed for pressure compensation) creates different “climate zones” inside
the headlight, where the lens are either warmed up by the light or cooled down by passing air.
When high air humidity and temperature differences exist between the inside of the headlights and the outside,
condensation can form on the inside of the lens, especially in cold and wet weather. The moisture in the
headlamps can be compared with condensation on the windshield, which is cleared by the "defroster vent". This
moisture buildup can happen for example: after a car wash, after steam cleaning of the engine or the front end, or
after overnight temperature changes.
This condition is more easily visible with headlights made from clear glass. The moisture is an optical condition
which DOES NOT affect the headlamp function (light performance) and does not lead to corrosion nor does it
lead to damage of the internal headlamp parts.

Page 1 of 8
© 2017 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.

Production Solution
Optimized headlight ventilation hose and adapter.

Service
For an effective repair it is necessary to distinguish between the following two scenarios:
1. Condensation, for example, during in the rain or
through a car wash. Also, described as
“steaming up” or “fogging”.

Figure 1. Example of a headlight with
condensation inside the lens.
2. Water leaking into the headlight assembly.

Figure 2. Example of a headlight with a leaking
condition.

Page 2 of 8
© 2017 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.

For headlights with condensation, prior to VIN CN008281:
1. Remove and dry out the headlight(s) with compressed air (less than 30 PSI).
2. Replace the ventilation hose (Figure 3,
1) and adapter (Figure 3, 3) on both
sides and attach it to the mounting
(Figure 3, 2). Use the part numbers
indicated in the Parts table below.

Figure 3. Illustration of the ventilation components.

Page 3 of 8
© 2017 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.

3. It is not necessary to use the membrane
from the original adapter.
Note:
Use caution when reinstalling the
headlight to assure the adapter is
properly seated.

Figure 4. Membrane from original adapter.

For headlights with condensation, after VIN CN008281:
1. Remove and dry out the headlight(s) with compressed air (less than 30 PSI).

Page 4 of 8
© 2017 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.

2. Replace the ventilation hose (Figure
5, 1) on both sides and attach it to the
mounting (Figure 5, 2). Use the part
numbers indicated in the Parts table
below.
Note:
Use caution when reinstalling the
headlight to assure the adapter is
properly seated.

Figure 5. Illustration of the ventilation components.

For headlights with a leaking condition, prior to VIN CN008281:
When replacing the headlight, follow the headlight condensation repair instructions above using a new ventilation
hose (Figure 3, 1) and adapter (Figure 3, 3) according to the Parts table below. Route the new ventilation hose
behind the bumper carrier.
For headlights with a leaking condition, after VIN CN008281:
When replacing the headlight, follow the headlight condensation repair instructions above using a new ventilation
hose (Figure 3, 1) on both sides according to the Parts table below. Route the new ventilation hoses behind the
bumper carrier.

Page 5 of 8
© 2017 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.

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:

9415

Damage Code:

0050

Labor Operations:

Headlight modification, Xenon, or LED:
Repair headlight,
one side

9415 4199

50 TU

9415 4299

70 TU

-ORRepair headlight,
both sides

Headlight replacement, Xenon:
1 Headlight
assembly remove
+ reinstall

9415 1900

30 TU

2 Headlight
assembly adjust

9415 1600

20 TU

1 Headlight
assembly replace

9415 5550

20 TU

2 Headlight
assembly remove
+ reinstall

9415 2000

40 TU

2 Headlight
assembly adjust

9415 1600

20 TU

-OR-

Page 6 of 8
© 2017 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.

2 Headlight
assembly replace

9415 5650

30 TU

Headlight replacement, LED
1 Headlight
assembly remove
+ reinstall

9415 1900

30 TU

2 Headlight
assembly adjust

9415 1600

20 TU

1 Headlight
assembly replace

9415 5551

70 TU

2 Headlight
assembly remove
+ reinstall

9415 2000

40 TU

2 Headlight
assembly adjust

9415 1600

20 TU

2 Headlight
assembly replace

9415 5651

130 TU

GFF – Checking
and clearing fault
codes included in
existing labor
operations

0150 0000

Time stated on diagnostic protocol (Max 70
TU)

Road test prior to
service procedure

No allowance

0 TU

Road test after
service procedure

No allowance

0 TU

-OR-

Diagnostic Time:

Technical diagnosis at dealer’s discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:

As per TSB #2030960/2

Page 7 of 8
© 2017 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.

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
Part Number

Part Description

Quantity

4H0941717B

Ventilation hose, left side

1

4H0941718B

Ventilation hose, right side

1

4H0941109A

Hose adapter, left side

1

4H0941110A

Hose adapter, right side

1

Additional Information
The following Technical Service Bulletin(s) will be necessary to complete this procedure:
 TSB 2012749, 94 Exterior lights, moisture accumulation.
All parts and service references provided in this TSB (2030960) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.
©2017 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 8 of 8
© 2017 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.