19 Coolant level warning light on with coolant marks on the coolant pump - 4.0 TFSI
19 20 01 2048936/2 February 13, 2020. Supersedes Technical Service Bulletin Group 19 number 17-91 dated
September 20, 2017 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

S6, RS 6,
and S7

2013 - 2018

All

4.0 TFSI

RS 6+, RS
7+

2016 - 2018

All

4.0 TFSI

RS 7

2014 - 2018

All

4.0 TFSI

A8, S8

2013 - 2017

All

4.0 TFSI

S8+

2016 - 2017

All

4.0 TFSI

Condition
REVISION HISTORY
Revision

Date

Purpose

2

-

Revised title
Revised Warranty (Updated Labor Operations and removed test drive)

1

09/20/2017

Initial publication

Customer states:
 Coolant level warning light on.
 The vehicle loses or is leaking coolant.

Page 1 of 7
© 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.

Workshop findings:
There are coolant marks in the area of the
coolant pump housing (Figure 1, position
12), the coolant connector union (Figure
1, position 7) or the thermostat housing
(Figure 1, position 14). After cleaning the
coolant marks and performing another
leakage test there are fresh coolant
marks on the coolant pump drive (Figure
2 through Figure 6).

Figure 1. View position complete water pump assembly (rear view).

Figure 2. Coolant marks in the plug of the coolant pump housing.

Page 2 of 7
© 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.

Figure 3. Coolant marks on the flange of the coolant pump housing.

Figure 4. Coolant marks on the flange of the thermostat housing.

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© 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.

Figure 5. Coolant marks on coolant connector union.

Figure 6. Areas where coolant marks can be found.

Technical Background
The coolant pump housing is sealed off with a slip ring seal to the input shaft. To prevent the seal from drying up,
a minor coolant leak is necessary to lubricate the seal.
If coolant marks are detected in the area of the coolant pump housing during service and there is no customer
concern about coolant level/loss, a replacement of the coolant pump housing is not allowed.

Page 4 of 7
© 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.

Production Solution
Not applicable.

Service
1. Fully complete the attached worksheet and attach it to the repair order.
2. Remove the coolant marks and bleed the cooling system according to the repair manual. Then check the
cooling system for leaks according to the repair manual:
 If there is no new leak visible on the coolant pump, do not perform any further repairs.
3. If a new coolant leak is detected and can be assigned to a component, take a photo of the renewed leak and
attach it to the repair order.
4. If there is a coolant leak in the area of the coolant connector union a replacement of the O- ring only (Figure
1, position 8) is sufficient.
Note:
In the case of insufficiently documented repair orders, the warranty claim may be denied.

Warranty
Claim Type:

 110 up to 48 Months/50,000 Miles.
 G10 for CPO Covered Vehicles – Verify Owner.
 If the vehicle is outside any warranty, this Technical Service Bulletin is informational
only.

Service Number:

 1950 without any parts/replacement of the coolant pump
 1961 replace O-ring on coolant connector union

Damage Code:

0050

Labor Operations:

All models:
Remove + reinstall front dampening pan

1082 1900

See SRT

Clean coolant pump

1950 2999

10 TU

Cover (plenum) remove + reinstall

8522 1900

See SRT

Must only be used if O-ring is not replaced

Page 5 of 7
© 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.

Bleed cooling system, check for leaks

1938 0799

80 TU

1961 5599

160 TU

Remove + reinstall cooling fan housing

1920 19XX

See SRT

Replace O-ring on connector union

1961 5599

20 TU

GFF

No allowance

0 TU

Road test prior to service procedure

No allowance

0 TU

Road test after service procedure

No allowance

0 TU

A8 and S8:
Replace O-ring on connector union
S6, S7, and RS 7:

Diagnostic Time:

Claim Comment:

As per TSB #2048936/2

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
Tool Number

Tool Description

VAG1274/8

Adapter

VAG1274/10

Adapter

VAG1274B

Adapter

VAS 6096

Cooling system pressure tester

Additional Information
All parts and service references provided in this TSB (2048936) 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

Page 6 of 7
© 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.

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 7 of 7
© 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.