Audi A6 2008–2011 — technical service bulletin
Bulletin Circular - Emiss · NHTSA communication 10133276 · issued Dec 29, 2017
Technical service bulletin
communication type
Engine and Engine Cooling
component
2008–2011
model years
8
vehicle entries
Official summary
Over time and mileage and under certain conditions, the factory-installed catalysts may not perform as required by Federal regulations. If the effectiveness of a catalyst is reduced, this may result in an increase in tailpipe emissions and the vehicle could fail to pass an emissions inspection.
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.