Mazda CX-30 2019–2023 — technical service bulletin
Bulletin 04-006-22 · NHTSA communication 10228661 · issued Dec 22, 2022
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2019–2023
model years
11
vehicle entries
Official summary
Some customers may complain about hearing a grinding noise and/or vibration occur when applying the brake. This is due to rust on the rear brake disc plate.
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.