Mazda CX-30 2019–2021 — technical service bulletin
Bulletin 09-034-22 · NHTSA communication 10218737 · issued Aug 23, 2022
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
5
vehicle entries
Official summary
Some customers may complain about a fuel gauge that fluctuates to a higher level at a stop on inclines, even after a long drive since it was fully refilled. This is caused by improper control software of the body control module (BCM). To eliminate this concern, the control software of the BCM has been modified.
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.