Audi S4 2010 — technical service bulletin
Bulletin 39131320352491 · NHTSA communication 10226539 · issued Sep 23, 2013
Technical service bulletin
communication type
Power Train
component
2010
model years
3
vehicle entries
Official summary
Sports differential fails basic setting after differential or sensor replacement
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.