Mazda CX-30 2019–2020 — technical service bulletin
Bulletin 01-001-25 · NHTSA communication 11014789 · issued Feb 7, 2025
Technical service bulletin
communication type
Engine
component
2019–2020
model years
3
vehicle entries
Official summary
Some customers may complain about a very low frequency noise and/or vibration felt at the steering wheel, the floor and/or the seats when driving at 1500-1650 rpm in any gear position. This may be caused by normal vehicle behavior while the cylinder deactivation is active (two cylinders drive). The state of the cylinder deactivation can be monitored in the center display to help verify if this is the issue.
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.