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Service bulletin A191789 2046712-

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 id10127818
Published by NHTSA2018-02-05
Manufacturer's numberA191789 2046712-
Manufacturer's date2017-07-14
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

This informational bulletin contains guidelines for figuring out why coolant marks are present around the coolant expansion tank cap.

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, Cooling system

Vehicles listed
AUDI A32012, 2013
AUDI A32014
AUDI A32020
AUDI A3 CABRIOLET2015 to 2019
AUDI A3 ETRON2012 to 2015
AUDI A3 SPORTBACK E-TRON2016 to 2017
AUDI A42020
AUDI A4 ALLROAD2013, 2014, 2015, 2016, 2017, 2018, 2019
AUDI A4 AVANT2012
AUDI A52012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
AUDI A5 CABRIOLET2012 to 2018
AUDI A62012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
AUDI A72012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
AUDI A82012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
AUDI ALL2016
AUDI ALLROAD2012 to 2019
AUDI AUDI2012
AUDI B82012 to 2013
AUDI C62012 to 2013
AUDI C72012 to 2013
AUDI D32012 to 2013
AUDI D42012 to 2013
AUDI Q32012 to 2014
AUDI Q32015, 2016, 2017, 2018, 2019, 2020
AUDI Q52012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
AUDI Q5 HYBRID2013 to 2017
AUDI Q72012, 2013, 2014, 2015
AUDI Q72016
AUDI Q72017, 2018, 2019, 2020
AUDI R82013
AUDI R82016
AUDI R82019
AUDI R8 GT SPYDER2012
AUDI R8 SPYDER2014 to 2015
AUDI R8 SPYDER2017 to 2018
AUDI R8 SPYDER2020
AUDI RS 32017, 2018
AUDI RS 52013, 2014, 2015
AUDI RS 52016
AUDI RS 52018
AUDI RS 5 CABRIOLET2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
AUDI RS 72014, 2015, 2016, 2017, 2018
AUDI RS42018
AUDI RS52012
AUDI RS52013, 2014, 2015
AUDI RS52016 to 2017
AUDI RS5 CABRIOLET2016 to 2017
AUDI RS62012 to 2017
AUDI RS72013
AUDI RS72019
AUDI S32015, 2016, 2017, 2018
AUDI S42012, 2013, 2014, 2015, 2016
AUDI S42017
AUDI S42018, 2019
AUDI S52012, 2013, 2014, 2015, 2016, 2017, 2018
AUDI S5 CABRIOLET2012 to 2017
AUDI S62012
AUDI S62013, 2014, 2015, 2016, 2017, 2018
AUDI S72012
AUDI S72013, 2014, 2015, 2016, 2017, 2018
AUDI S82012
AUDI S82013, 2014, 2015, 2016, 2017, 2018
AUDI S8 PLUS2016 to 2018
AUDI SQ52012 to 2013
AUDI SQ52014, 2015, 2016, 2017, 2018
AUDI TT2020
AUDI TT ROADSTER2012 to 2019
AUDI TTS2012, 2013, 2014, 2015, 2016, 2017, 2018

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

Recalls for the same vehicles and component
18V2290002018-04-11. ENGINE AND ENGINE COOLING:COOLING SYSTEM
17V0020002017-01-03. ENGINE AND ENGINE COOLING:COOLING SYSTEM

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
A9724072073305_12024-04-04. Service bulletin. This bulletins provides information when the radiator fans, alarm, or wipers are not working; DTC P048000, _048100, U063200, U063300, U10F300, U10A400, P10EF00.
A2024672073032_12024-04-04. Service bulletin. This bulletin provides information for when the MIL is on, DTC P148D00 and P044200; leak diagnostic pump.
A1924522065040_42024-03-06. Service bulletin. This bulletin provides information when the coolant warning light is on or when the coolant pump is replaced due to a coolant leak.
AVIN4PIN202402142024-03-06. Service bulletin. Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Front window inoperative Air suspension warning - DTC P089200 Charge handle doesn’t release Vehicle will not charge Temp sensor DTC P218500 Corrosion on wheelhouse cover plate
19i9UPDATE2024-02-26. Service bulletin. Coolant Expansion Tank (NVLW)
19i5UPDATE2024-02-26. Service bulletin. Coolant Pump and Power Steering Pump (NVLW)
19123320306232024-02-20. Service bulletin. Coolant temperature sporadically too high, C7 V6
DC_Closure 19N82024-02-06. Service bulletin. SERV_ACT - After-Run Coolant Pump - Closure Notice
Update19i52024-01-22. Service bulletin. Coolant Pump and Power Steering Pump
AVIN4PIN202312012024-01-04. Service bulletin. Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Fuel pressure low. DTC P008700 Front window inoperative Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge noise from belt tensioner damper Wheel speed sensor DTC C101AF1;C101BF1;C101CF1;C101DF1