Audi A4 2009–2013 — technical service bulletin
Bulletin A011886 2035454- · NHTSA communication 10149109 · issued Sep 11, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2013
model years
20
vehicle entries
Official summary
This technical service bulletin contains instructions for pressure washing ports to resolve an "AIR system -- action required" message.
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.