Technical Service Bulletin
19 loss of coolant from coolant pump - V6 TFSI
19 23 45 2070349/2 November 1, 2023. Supersedes Technical Service Bulletin Group 19 number 23-39 dated
May 17, 2023 for reasons listed below.
Model(s)

Year

S4, S5, S5
Cabriolet, S5
Sportback, and
SQ5

2018 – 2024

RS 5

2018 – 2019
2021 – 2024

A6, A7, A8, and
Q8

2019 – 2024

RS 5 Sportback

VIN Range

Vehicle-Specific Equipment

All

V6 Engine

2019
2021 – 2024

A6 allroad, S6,
A7, and Q7

2020 – 2024

SQ5 Sportback

2021 – 2024

Condition
REVISION HISTORY
Revision

Date

Purpose

2

-

Production Solution (Added countermeasure production dates)
Service (Updated instructions)
Warranty (Updated labor operations)

1

05/18/2023

Initial publication

Customer states:
• Coolant loss/leak.
• Coolant warning lamp.
Workshop findings:
The coolant pump is suspected to be the source of the leak.

Technical Background
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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
To avoid repeat repairs or incorrect repairs, make sure to locate the leak precisely. Ensure that the coolant level
has not dropped due to insufficient bleeding during production or due to a previous repair.
Note:
Traces of coolant (small quantity) on drip cup (refer to figure 1).
Due to lubrication/cooling of the seal, up to 3 ml may escape over the course of 100 hours of operation. This is
quite normal and does not constitute a reason for a complaint.

Figure 1: Traces of coolant on the drip cup.

Production Solution
Counter measure was implemented in production according to the following table:
Model

Production Date

SQ5

Mar 19, 2022

Q7/Q8

Nov 30, 2021

S6/ S7/A6/A7

Nov 30, 2021

© 2023 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
S4/S5/ RS5

Nov 19, 2021

A8

Nov 17, 2021

Service
Locate the leak precisely and then proceed as follows:
1) Clean and dry the leak and traces of coolant thoroughly.
2) Fill the cooling system to max.
3) Perform visual check; assess whether there may be a leak at idling speed and at higher engine speeds of up to
approx. 2500 rpm.
4) Check the cooling system for leaks according to the Workshop Manual.
5) Remove vacuum line from water pump and check for coolant leaks
6) Reassess the suspected leak:
→ No further coolant leak can be detected: continue to observe without replacing any parts.
→ Coolant leak can be detected again and vehicle production date is after solution implementation dates
mentioned in “Production Solution” section above, please contact TAC for additional information before
proceeding.
→ Coolant leak can be detected again and vehicle production date is before Production Solution implementation
dates mentioned in “Production Solution” section above, replace the component causing the leaks and any
components connected to the vacuum system that show signs coolant ingress.

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:

1950

Damage Code:

0050

Labor Operations:

Remove and install noise insulation.

1082 19XX

See SRT with
associated
operations

Check and top up coolant, clean, and
perform visual check.

1938 3599

30 TU

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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

Diagnostic Time:

Claim Comment:

Check cooling system for leaks

1901 0150

See SRT with
associated
operations

Remove and install coolant pump (Only if
Faulty)

1950 19XX

See SRT with
associated
operations

GFF

0150 0000

Time stated on the
diagnostic protocol
(Max 50 TU)

Road test prior to the service procedure

No allowance

0 TU

Road test after the service procedure

No allowance

0 TU

As per TSB 2070349/2

All warranty claims submitted for payment must be in accordance with the Audi Warranty policies and
Prodcedures Maual. Claims are subject to review or audit by Audi warranty.

Additional Information
All part and service references provided in this TSB (2070349) 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.
©2023 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.

© 2023 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.