# Service bulletin A171566 2040644\-

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: 10130222
- Published by NHTSA: 2018\-03\-13
- Manufacturer's number: A171566 2040644\-
- Manufacturer's date: 2015\-10\-14
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Supersedes Technical Service Bulletin Group 17 number 15\-64 dated June 3, 2015. A metallic whistling or grinding sound is heard from the engine compartment when the vehicle is at idle speed. The sound usually only occurs when the engine is warm. The MIL is sporadically on. DTCs are stored in the ECM. A leak in the crankcase breather module \(pressure regulating valve\) can cause this condition.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10130222-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10130222-0001.pdf)

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

## Components

Engine

## Vehicles listed

- 2013 to 2016 AUDI A8
- 2014 to 2016 AUDI RS 7
- 2013 AUDI RS7
- 2013 to 2016 AUDI S6
- 2013 to 2016 AUDI S7
- 2013 to 2016 AUDI S8

## Recalls for the same vehicles and component

- [2022133](/recalls/tc/2022133.md), 2022-03-23: Engine
- [22V178000](/recalls/nhtsa/22V178000.md), 2022-03-23: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER
- [16V619000](/recalls/nhtsa/16V619000.md), 2016-08-24: ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [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\_2051095\_10](/bulletins/11029368.md), 2026-03-03, Service bulletin: ENGINE. This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.
- [TSB\_2021205\_10](/bulletins/11029367.md), 2026-03-03, Service bulletin: ENGINE. This bulletin provides information on VIN Plates, Safety Certification labels, and the ordering procedures.
- [TSB\_2060750\_5](/bulletins/11028398.md), 2026-02-06, Service bulletin: ENGINE. This bulletin provides information regarding UV leak additive for finding oil leaks.
- [TSB\_2074640\_2](/bulletins/11027356.md), 2026-01-07, Service bulletin: ENGINE. This bulletin provides information when there is increased oil consumption; \>0.5ltr/1000 km.
- [TSB\_2080166\_1](/bulletins/11026291.md), 2025-12-05, Service bulletin: ENGINE. This bulleti provides information when the fuel pressure is outside of tolerance, MIL is on, DTC P310B00.
- [TSB\_2075530\_2](/bulletins/11016532.md), 2025-04-04, Service bulletin: ENGINE. This bulletin provides informatin when the engine does not run smoothly at idling speeds.
- [A0124482014753\_13](/bulletins/11012476.md), 2025-01-07, Service bulletin: ENGINE. This bulletin provides information when the MIL is on; DTCs for misfire, air/fuel ratio imbalance, or lean fuel system stored in the ECM P030000.
- [A1524532075530\_1](/bulletins/11009928.md), 2024-11-06, Service bulletin: ENGINE. This bulletin provides informatin when the engine does not run smoothly at idling speeds.

JSON: [/v1/bulletins/10130222](/v1/bulletins/10130222)

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