Audi A4 2011–2014 — technical service bulletin
Bulletin 143220350734 · NHTSA communication 10216683 · issued Mar 24, 2014
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2014
model years
18
vehicle entries
Official summary
The NVLD pressure switch may erroneously detect a very small leak.
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.