One problem related to alternator/generator/regulator has been reported for the 2010 Mazda MAZDA3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Mazda MAZDA3 based on all problems reported for the 2010 MAZDA3.
When the trunk or door is inadvertently left open for an extended period of time the battery is totally drained. This could leave the driver stranded. If jump started and battery is not fully charged this could cause increased stress on the alternator which could lead to costly replacement.