Audi A6 2014–2016 — technical service bulletin
Bulletin Circular-Emissio · NHTSA communication 10133327 · issued Feb 8, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2014–2016
model years
12
vehicle entries
Official summary
3.0 TDI vehicles were equipped with undisclosed Auxiliary Emission Control Devices which are not permitted by emissions regulations. Revised legal approved copy.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.