Audi A3 Cabriolet 2017–2018 — technical service bulletin
Bulletin A911932 2053533- · NHTSA communication 10157247 · issued Feb 1, 2019
Technical service bulletin
communication type
Electrical System
component
2017–2018
model years
4
vehicle entries
Official summary
This bulletin contains a software update for when the subwoofer adjustment setting is missing in the MMI, vehicles have Bang & Olufsen.
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.