There are 2 stored owner reports matching the engine leading-label group for the 2011 Mazda Mazda3 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)AIR CONDITIONER COILS ARE CONTINUALLY PRODUCING MOLD. CHANGE AIR CABIN FILTER REGULARLY, MOLD IS EVEN GROWING ON FILTERS. WHEN COILS ARE TOUCHED, BLACK MOLD COMES OFF ON RAG. I HAVE SEVERE MOLD ALLERGIES AND HAVE HAD TO HAVE THE COILS CLEANED PROFESSIONALLY AS WELL AS THE AC VENTS CLEANED TO REMOVE SPORES. I HAVE NEVER HAD THIS KIND OF PROBLEM WITH ANY CAR I'VE EVER HAD. *TR
I STOPPED AT A STOP SIGN AND MY CAR STARTED ACCELERATING AS IF THE ACCELERATOR WAS FULLY DEPRESSED. MY FOOT WAS SQUARELY ON THE BRAKE AT THE TIME BUT I WAS BEING PULLED SLOWLY FORWARD ON TO A BUSY ROADWAY. I AM AN EXPERIENCED DRIVER AND WAS ABLE TO TURN THE CAR SHARPLY TO THE RIGHT ALONG THE SHOULDER TO AVOID ONCOMING TRAFFIC. I SHIFTED INTO PARK, AND THEN SHUT THE ENGINE OFF. MY FOOT PLACEMENT WAS NO WHERE NEAR THE ACCELERATOR, AND THERE WERE NO OTHER OBSTRUCTIONS (I.E. CARPETS). WHEN I RESTARTED THE CAR THE ENGINE SOUNDED NORMAL. AS AN ENGINEER, I AM FAIRLY CERTAIN THAT WHAT EVER HAPPENED WAS ELECTRONIC IN NATURE, NOT A MECHANICAL OBSTRUCTION OR STICKING LINKAGE (I DID NOT TOUCH THE GAS PEDAL WHEN I RESTARTED). PRIOR TO THIS INCIDENT I HAD BEEN DRIVING SLOW THOUGH A BUSINESS PARK AT 10 TO 15 MILES AND HOUR FOR A COUPLE OF MINUTES, I WAS AT A DOCTOR APPOINTMENT. I HAVE NOT SEEN THIS ISSUE BEFORE OR SINCE. MAZDA HAS EXAMINED THE CAR AND DID NOT SEE ANYTHING. I LIKE THE CAR, BUT I THOUGHT IT WAS IMPORTANT TO GET THIS POTENTIALLY DANGEROUS FLAW ON RECORD. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.