Audi A3 2017–2020 — technical service bulletin
Bulletin Circular 24GJ · NHTSA communication 10190289 · issued Apr 9, 2021
Technical service bulletin
communication type
Electrical System
component
2017–2020
model years
4
vehicle entries
Official summary
Audi is providing an Engine Control Module (ECM) software update to address elevated tailpipe emissions that were found during vehicle testing. This software will also improve drivability and provide other diagnostic improvements.
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.