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Service bulletin Circular 24EC

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10163506
Published by NHTSA2019-08-07
Manufacturer's numberCircular 24EC
Manufacturer's date2019-07-19
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Undisclosed Engine Control Module (ECM) Software 2015 S7, 2015-2016 S3 Sedan, 2016 A3 Sedan, A3 Cab, A6 Sedan, 2017 R8 Coupe, 2018 A5 Sportback, SQ5, R8 Spyder, A5 Coupe, A4 Sedan

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
AUDI A3 CABRIOLET2016
AUDI A4 ALLROAD2018
AUDI A62016
AUDI R8 SPYDER2017
AUDI S32015, 2016
AUDI S52018
AUDI S72015
AUDI SQ52018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20221332022-03-23. Engine
22V1780002022-03-23. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB_2081030_42026-10-05. Service bulletin. This bulletin provides information when there is an abnormal knocking noise from the engine compartment; V6 3.0L TFSI.
TSB_2081030_32026-09-04. Service bulletin. This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.
SM 35-20262026-09-04. Other. This special notice is to inform dealers to return the parts listed and only order the successor parts going forward.
TSB_2082323_12026-07-07. Service bulletin. This bulletin provides informaiton when the engine is not running smoothly, misfiring.
TSB_2074640_32026-07-07. Service bulletin. This bulletin provides information when there is increased oil consumption; >0.5ltr/1000 km.
TSB_2073867_32026-07-07. Service bulletin. This bulletin provides information when DTC U140A00 Terminal 30 is stored in the ECM.
TSB_2081030_22026-05-05. Service bulletin. This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.
TSB_2081030_12026-05-05. Service bulletin. This bulletin provides information when there is an abnormal engine knocking noise from the engine compartment; V6 3.0L TFSI.
TSB_2081342_12026-04-07. Service bulletin. This bulletin provides information when there is a Drive System Malfunction, DTCs related to Knock Sensor P0327, P0332, P0328, P0333 - V6 TFS.
TSB_2051095_102026-03-03. Service bulletin. This bulletin provides information on the use of the Audi frequencly analysis app, and where the application can be downloaded.