Audi A3 2010–2013 — technical service bulletin
Bulletin 23W1 - Circular · NHTSA communication 10127921 · issued Aug 11, 2017
Technical service bulletin
communication type
Equipment
component
2010–2013
model years
3
vehicle entries
Official summary
Inlet Air Box Housing Snow Flap Replacement & Oxygen Sensor Inspection/Replacement - The snow flap in the inlet air box housing may remain partially to fully open. Should this occur, excess warm air could enter the air intake through the snow flap inlet. The oxygen sensor will be checked during this service and, if measured degradation tolerances are met, the sensor will be replaced.
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.