Mazda CX-3 2016–2021 — technical service bulletin
Bulletin 07-005-21-3836 · NHTSA communication 10202690 · issued Oct 21, 2021
Technical service bulletin
communication type
Visibility
component
2016–2021
model years
6
vehicle entries
Official summary
Some customers may complain about warm air from the climate control vents. This may be caused by improper brazing (A) of the evaporator (B), causing a refrigerant leak from the joint between the tubes (C) and the header (D). To eliminate this concern, the configuration of the brazing set up has been improved.
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.