Mazda CX-30 2021–2023 — technical service bulletin
Bulletin 09-001-23a · NHTSA communication 10248394 · issued Dec 18, 2023
Technical service bulletin
communication type
Equipment
component
2021–2023
model years
15
vehicle entries
Official summary
Some vehicles may exhibit an â In Vehicle Network Malfunctionâ message appearing in the instrument cluster with DTC U3000:04-TCU (Telematics communication unit internal malfunction) stored after the connected service contract has been discontinued. This is caused by improper control software of the telematics communication unit (TCU). To eliminate this concern, the control software of the TCU has been modified
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.