Technical Service Bulletin
19 Coolant leak at connection of water pump and hose leading to the heater core
19 13 46 2033491/5 November 7, 2013. Supersedes Technical Service Bulletin Group 19 number 13-44 dated
July 18, 2013 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A4, A5, A5 cab,
Q5, A6

2009-2013

All

2.0 TFSI

Condition
REVISION HISTORY
Revision

Date

Purpose

5

-

Revised Required Parts and Tools (Updated part)

4

08/19/2013

Revised Condition (Corrected Revision History table)

3

07/11/2013

Revised Required Parts and Tools (Union seals added)

2

06/17/2013

Revised Service (Part number for seal ring updated)
Revised Required Parts and Tools (Part number for seal ring updated)

1

04/15/2013

Initial publication

Customer may report coolant leaking from the engine area.

Technical Background
The leak can be traced to the connection of the water pump
and the hose leading to the heater core (Figure 1). The seal
ring is not the cause of the leak.

Figure 1. Connection of water pump and hose
leading to heater core
© 2013 Audi of America, Inc.

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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
1. Visually inspect the area of the suspected coolant leak.
2. Classify suspected coolant leak as Category 1, Category 2, or Category 3, according to the Categorization of
Leaks table included in the Audi Warranty Policies and Procedures Manual (see below).

Categorization of leaks

Reimbursement of leaks

The component (in this case, coolant hose) and the immediately
adjacent component it is mounted to (in this case, the water
pump) …

With customer
concern

Without customer
concern

Category 1

… may be wet with fluid residue, however, there is Cleaning
no droplet formation and no other components
are affected.

No reimbursement

Category 2

… is wet with fluid residue, and there is droplet
formation or slight seepage, however, those
droplets are not dropping off.

Cleaning

No reimbursement

Category 3

… is wet with fluid residue, there is droplet
formation, and those droplets are dropping off.

Replacement of leaking part

If the leak falls into Category 1 or Category 2, proceed as instructed by the table. If the leak falls into Category
3, proceed to step 3.
3. After confirming that the leak is a category 3 leak, take a photograph of the leak (use leak talcum spray if
necessary) and attach a printout of the photograph to your warranty paperwork.
4. Replace the water pump (06H121026CF), seal ring (WHT006407), and the hose to the heater core
(06H121065D).
Note:
Replacing only the seal ring may not prevent the leak from reoccurring.

© 2013 Audi of America, Inc.

Page 2 of 4

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
Warranty
Claim Type:

Use applicable claim type. If vehicle is outside any warranty, this Technical Service Bulletin
is informational only.

Service Number:

1962

Damage Code:

0050

Labor Operations: Coolant pump remove+reinstall

Diagnostic Time:

1950 1913

290 TU

Coolant hose remove+reinstall

1962 1950

10 TU

GFF

No allowance

0 TU

Road test prior to service procedure

No allowance

0 TU

Road test after service procedure

0121 0004

10 TU

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 #2033491/5

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

06H121026CF Water pump with cooling thermostat

1

06H121065D

Water tube

1

WHT001163B

Bolt for water pump sprocket

1

N 90686902

Spring clip

1

WHT002001

Round seal

2

WHT006407

Seal ring

1

Please verify the correct parts needed with your parts department.

© 2013 Audi of America, Inc.

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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
Additional Information
The following repair procedures will be necessary to complete this procedure:
• Repair Manual>>Engine>>Engine Mechanical>>19 Cooling System>>Removal and Installation>>Coolant
Pump
• Repair Manual>>Engine>>Engine Mechanical>>19 Cooling System>>Removal and Installation>>Small
Coolant Pipe
All parts and service references provided in this TSB (2033491) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.

© 2013 Audi of America, Inc.

Page 4 of 4

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.