Technical Service Bulletin
19 loss of coolant from coolant pump - V6 TFSI
19 24 65 2070349/4 August 30, 2024. Supersedes Technical Service Bulletin Group 19 number 23-46 dated
December 12, 2023 for reasons listed below.
Model(s)

Year

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

2018 – 2024

A6, A7, A8, and
Q8

2019 – 2024

A6 allroad, S6,
S7, and Q7

2020 – 2024

A8 e quattro

2020 - 2021

RS 5, RS 5
Sportback, and
SQ5 Sportback

2021 – 2024

VIN Range

Vehicle-Specific Equipment

All

Not Applicable

Condition
REVISION HISTORY
Revision Date

Purpose

4

Revised Service (updated instructions)

-

Revised Technical Background (Added figure 2)
3

12/12/2023 Revised Service (updated instructions)

2

11/01/2023 Revised Production Solution (Added countermeasure production dates)
Revised Service (Updated instructions)
Revised Warranty (Updated labor operations)

Customer states:
•

Coolant loss/leak.

•

Coolant warning lamp.

•

Engine warning lamp on.

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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
Workshop findings:
The coolant pump is found to be the source of the leak.

In individual cases, the event memory entry “P0299: Turbo/Super Charger Underboost” is logged.
This is caused by secondary damage due to the N649 switch valve being contaminated with coolant
from the leaking coolant pump.

Technical Background 1
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:
1) 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.
2) Dried deposits on vacuum connection are not a clear indication of a leak (see Figure 2).

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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

Figure 1: Traces of coolant on the drip cup.

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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

Figure 2: Dried deposits on vacuum connection.

Production Solution
Not applicable.

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.

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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
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. Reassess the suspected leak:
→ No further coolant leak can be detected: continue to observe without replacing any parts.
→ Coolant leak can be detected again, replace the component(s) causing the leaks and document leaks
with photos/video. If the coolant pump is found to be leaking, also photograph the production date
(refer to image 3 for an example).

Figure 3: Example of coolant pump production date.

Warranty
Claim Type:

•

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

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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
Check and top up coolant, clean, and

1938 3599

30 TU

1901 0150

See SRT with

perform visual check.
Check cooling system for leaks

associated
operations
Remove and install coolant pump (Only if 1950 19XX

See SRT with

Faulty)

associated
operations

GFF

0150 0060

Labor according to
the diagnostic log

Charge battery

2706 8950

See SRT with
associated
operations

Claim Comment:

As per TSB 2070349/4

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.

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.
©2024 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.

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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.