Audi A5 2009–2013 — technical service bulletin
Bulletin A01166920330018 · NHTSA communication 10091808 · issued Jul 27, 2016
Technical service bulletin
communication type
Engine
component
2009–2013
model years
17
vehicle entries
Official summary
This tehcnial service bulletin provides cleaning instructions for carbon accumulation in the secondary air ports in the cylinder head.
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.