Mazda CX-5 2016–2021 — technical service bulletin
Bulletin 09-009-21-3759 · NHTSA communication 10189822 · issued Mar 11, 2021
Technical service bulletin
communication type
Structure
component
2016–2021
model years
11
vehicle entries
Official summary
Some customers may complain about rust at the bottom (inner side) of the doors where the seaming welt is located. It is caused by mud/sand adhering to the side sill, which scratches the paint surface when the door is opened/closed. The mud/sand is most likely brought in by the driver and/or passenger when stepping in and out of the vehicle.
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.