Mazda CX-5 2017–2021 — technical service bulletin
Bulletin 07-004-21-3830 · NHTSA communication 10202689 · issued Oct 8, 2021
Technical service bulletin
communication type
Equipment
component
2017–2021
model years
5
vehicle entries
Official summary
Some vehicles may exhibit insufficient A/C performance / insufficient airflow from vents or ducts. These concerns may be caused by an evaporator temperature sensor malfunction due to insufficient water-proofing. This may result in a detection error and therefore, improper operation of the A/C system. To eliminate this concern, the production process of the evaporator temperature sensor has been modified to ensure proper water-proofing.
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.