Mazda MAZDA3 2019–2023 — technical service bulletin
Bulletin 09-021-23 · NHTSA communication 10237203 · issued May 9, 2023
Technical service bulletin
communication type
Visibility
component
2019–2023
model years
5
vehicle entries
Official summary
Some vehicles may experience a gap between the glass and the rear door glass run-channel due to run-channel deformation. This causes poor appearance and wind noise when driving at high speed. This concern is due to the incorrect shape of the glass run-channel.
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.