One problem related to transmission solenoid has been reported for the 2012 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Mazda MAZDA3 based on all problems reported for the 2012 MAZDA3.
A hot and humid night waiting in line at a drive through with a slight up hill slope, the transmission did not engage from neutral to drive. After shifting from park to drive it went into 3rd gear with and engine light, haz road and at light. Po751 01/02, po780 02/02 codes. Transmission shop stated: transmission solenoids bad and smell of burnt fluid. Fluid was brown, car was one owner 233k . . Possible flood damaged from 4 mo earlier.