Audi A4 2010–2013 — technical service bulletin
Bulletin 97133620343221 · NHTSA communication 10226465 · issued Jun 10, 2013
Technical service bulletin
communication type
Electrical System
component
2010–2013
model years
8
vehicle entries
Official summary
Alarm horn does not work or turns on without cause
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.