Mazda CX-30 2019–2023 — technical service bulletin
Bulletin SA-038-24 · NHTSA communication 11003361 · issued Jun 14, 2024
Technical service bulletin
communication type
Electrical System
component
2019–2023
model years
17
vehicle entries
Official summary
Some customers may experience the master warning light and/or the "In-Vehicle Network Malfunction" warning message in the instrument cluster on with DTC B119F:01 (TCU - Tel antenna No. 1 malfunction) stored.
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.