Audi A6 2009–2012 — technical service bulletin
Bulletin A171555 2030197- · NHTSA communication 10120686 · issued Feb 9, 2015
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2012
model years
20
vehicle entries
Official summary
Supersedes Technical Service Bulletin Group 17 number 13-46 dated November 7, 2013. Customer complains of excessive oil consumption. Production solution is Crankcase pressure reduction starting with model year 2013.
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.