MAZDA issued a recall on the MAZDA3 model

On certain vehicles, a crack in the housing of the airbag crash zone sensor may allow water to enter the sensor and cause a short circuit. This will illuminate the airbag warning light. Until the problem is remedied, the airbag will not deploy as required in a frontal crash, increasing the risk of injury to the seat occupant. Correction: Dealers will inspect and, if necessary, replace with a modified sensor.