Mazda MAZDA3 2019–2021 — technical service bulletin
Bulletin 09-029-21-3811 · NHTSA communication 10202692 · issued Oct 8, 2021
Technical service bulletin
communication type
Fuel System, Gasoline
component
2019–2021
model years
3
vehicle entries
Official summary
When opening the fuel-filler lid to refuel, some customers may notice water and/or sand in the fuel-filler lid box area. They may complain about dried sand causing poor appearance. Since the drain hole on the dust cover is located in an improper position, water may not be able to completely drain which results in the accumulation of water and sand. To eliminate this concern, the dust cover (below) has been modified to drain the water more easily.
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.