Mazda CX-30 2019–2021 — technical service bulletin
Bulletin SA-044-21 · NHTSA communication 10199722 · issued Jul 13, 2021
Technical service bulletin
communication type
Service Brakes, Hydraulic
component
2019–2021
model years
5
vehicle entries
Official summary
When switching to the maintenance mode, U3000:53 and the related DTCs are stored, but the DTCs will not be cleared automatically after finishing the maintenance mode. It is necessary to clear the DTCs completely after performing the brake system maintenance mode. DTC codes: U3000:53, C0021:52, U0415:68
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.