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Service bulletin A171789 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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10133360
Published by NHTSA2018-04-16
Manufacturer's numberA171789 2040644
Manufacturer's date2017-11-21
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE

NHTSA's summary

This bulletin provides repair instructions on diagnosing and replacing a leak in the crankcase breather module.

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, Exhaust and emissions, Exhaust manifold, pipes and muffler

Vehicles listed
AUDI A62013, 2014, 2015, 2016
AUDI A72013, 2014, 2015, 2016
AUDI A82013, 2014, 2015, 2016

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

Other bulletins for the same vehicles and component
A011862 2050329_2018-05-21. Service bulletin. This bulletin contains repair instructions for when the MIL is on and there are one of several DTCs stored in the ECM.
A011747 20484112018-04-16. Service bulletin. This bulletin contains repair instructions for when a 4.0 liter engine has a MIL on, the engine may be limited to 4,000rpm, and there are DTCs about the intake manifold flap adjustment.
A261629 2045720-2018-02-05. Service bulletin. This bulletin provides information regarding the replacement of the front muffler if vibrations are noticed in the seat or center arm rest.
A241653204400312017-03-03. Service bulletin. THIS TECHNICAL SERVICE BULLETIN EXPLAINS HOW TO DIAGNOSE AND REPAIR ISSUES WITH THE INTAKE MANIFOLD FLAP VALVE N316.
A241654204400322017-02-23. Service bulletin. THIS TECHNICAL SERVICE BULLETIN EXPLAINS HOW TO DIAGNOSE AND REPAIR ISSUES WITH THE INTAKE MANIFOLD FLAP VALVE N316.
TSB-01-13-162013-12-02. Service bulletin. AUDI: DUE TO DEFECTIVE VACUUM ACTUATORS, SOME VEHICLES EXPERIENCE HIGH RPMS WITH A POWER REDUCTION, INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED (BANK 1 AND BANK 2) POWER AND VACUUM ACTUATOR NEEDS TO BE UPDATED. MODEL 2013 A6, A7, S4, S5 (CAB), Q7, Q5. *PE