# Service bulletin Circular 19P9

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10188611
- Published by NHTSA: 2021\-04\-06
- Manufacturer's number: Circular 19P9
- Manufacturer's date: 2021\-03\-02
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Due to a production irregularity, the cooling system in affected vehicles may have been filled with an antifreeze concentration for min. \-25 degrees Celsius instead of the required concentration for min. \-40 degrees Celsius.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188611-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10188611-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2019 to 2021 AUDI A6
- 2020 to 2021 AUDI A7
- AUDI AUDI
- 2020 to 2021 AUDI S6
- 2020 to 2021 AUDI S7

## Other bulletins for the same vehicles and component

- [TSB\_2083393\_1](/bulletins/11038129.md), 2026-10-05, Service bulletin: ENGINE. This bulletin provides information when the starter/generator drive belt is noisy or came off.
- [TSB\_2081030\_4](/bulletins/11038090.md), 2026-10-05, Service bulletin: ENGINE. This bulletin provides information when there is an abnormal knocking noise from the engine compartment; V6 3.0L TFSI.
- [TSB\_2081030\_3](/bulletins/11036938.md), 2026-09-04, Service bulletin: ENGINE. This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.
- [TSB\_2082323\_1](/bulletins/11034728.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides informaiton when the engine is not running smoothly, misfiring.
- [TSB\_2074640\_3](/bulletins/11034657.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides information when there is increased oil consumption; \>0.5ltr/1000 km.
- [TSB\_2073867\_3](/bulletins/11034656.md), 2026-07-07, Service bulletin: ENGINE. This bulletin provides information when DTC U140A00 Terminal 30 is stored in the ECM.
- [TSB\_2081030\_2](/bulletins/11032174.md), 2026-05-05, Service bulletin: ENGINE. This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.
- [TSB\_2081030\_1](/bulletins/11032173.md), 2026-05-05, Service bulletin: ENGINE. This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.
- [TSB\_2081342\_1](/bulletins/11031044.md), 2026-04-07, Service bulletin: ENGINE. This bulletin provides information when there is a Drive System Malfunction, DTCs related to Knock Sensor P0327, P0332, P0328, P0333 \- V6 TFS.
- [TSB\_2070915\_2](/bulletins/11031000.md), 2026-04-07, Service bulletin: ENGINE. This bulleitn provides informaiton when there is a loose engine oil filler cap; P006800, P227900, P050700 \- 2.0 ltr. TFSI.

JSON: [/v1/bulletins/10188611](/v1/bulletins/10188611)

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