Audi A6 2013–2017 — technical service bulletin
Bulletin 147920333793 · NHTSA communication 10216616 · issued May 29, 2021
Technical service bulletin
communication type
Electrical System
component
2013–2017
model years
14
vehicle entries
Official summary
An oil filter that is too short is installed. The oil filter must be 155 (+/-1) mm long. If the oil filter is too short, the drain flap in the oil filter housing will not be completely closed and oil pressure will be reduced.
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.