Audi A6 2012–2015 — technical service bulletin
Bulletin A871781 2044717- · NHTSA communication 10127944 · issued Aug 16, 2017
Technical service bulletin
communication type
Engine
component
2012–2015
model years
8
vehicle entries
Official summary
This bulletin provides instructions on correcting a high-pitched buzzing noise in the cabin when the fan speed is no higher than 2.
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.