Mazda CX-30 2021–2024 — technical service bulletin
Bulletin SA-027-23c · NHTSA communication 10246210 · issued Nov 14, 2023
Technical service bulletin
communication type
Unknown OR Other
component
2021–2024
model years
19
vehicle entries
Official summary
In-Vehicle Network Malfunction error message and Master Warning light ON with DTC U3000:04 (Telematics communication unit internal malfunction) stored.
Vehicles covered
- 2021 Mazda CX-30
- 2022 Mazda CX-30
- 2023 Mazda CX-30
- 2024 Mazda CX-30
- 2021 Mazda CX-5
- 2022 Mazda CX-5
- 2023 Mazda CX-5
- 2024 Mazda CX-5
- 2023 Mazda CX-50
- 2024 Mazda CX-50
- 2021 Mazda CX-9
- 2022 Mazda CX-9
- 2023 Mazda CX-9
- 2021 Mazda MAZDA3
- 2022 Mazda MAZDA3
- 2023 Mazda MAZDA3
- 2024 Mazda MAZDA3
- 2022 Mazda MX-30
- 2023 Mazda MX-30
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.