There are 3 stored owner reports matching the engine leading-label group for the 2004 Mazda MX-5 Miata 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 3 of 3 matching reports.
Open the full vehicle complaint log (all categories)THE CAR HAS A INTERMITTENT PROBLEM RUNNING, IT HAPPENS WITHOUT WARNING. LAST TIME IT HAPPENED I WAS ALMOST RUN OVER BY A 18 WHEELER. I HAVE MENTIONED IT TO THE DEALER AND NO RECALL EXISTS THIS PROBLEM IS WIDESPREAD ON THIS MODEL AS NOTED BY MEMBERS OF MIAT ACAR CLUBS. BECAUSE THE MANUFACTURER WILL NOT OWN UP TO THE PROBLEM EXTENSIVE TESTING HAS BEEN DONE BY OUR CAR FORUM. REPLACING THE MAP SENSOR CURES THE PROBLEM FOR ABOUT 90 DAYS BUT AT 100 DOLLARS A POP IT IS A LITTLE EXPENSIVE. CARS THAT HAVE HAD THIS PROBLEM HAVE BEEN MODIFIED TO RUN WITHOUT A MAP SENSOR AND THIS HAS CURED THE PROBLEM. UNFORTUNATELY THE CURE IS 2000 BUCKS. I HAVE BEEN HAVING THIS PROBLEM FOR 2 YEARS NOW AND WOULD LIKE SOME HELP FIXING IT. *TR
CAR WOULD NOT ACCELERATE. I CAME TO A STOP AT A TOLL BOOTH. WHEN I WENT TO PULL AWAY THE CAR WOULD HARDLY ACCELERATE. ANY AMOUNT OF THROTTLE WOULD CAUSE THE CAR TO BOG OUT. SEEMS VERY LIKELY A CRASH COULD OCCUR IF THIS PROBLEM HAPPENED AT THE WRONG TIME. THIS IS SPECIFICALLY A PROBLEM WITH THE MAZDASPEED MODEL OF THE MX-5. *TR
TL*THE CONTACT OWNS A 2004 MAZDA MIATA. WHEN THE CONTACT DEPRESSED THE ACCELERATOR PEDAL AFTER A STOP, THE VEHICLE FAILED TO MOVE. THE DEALER INSPECTED THE VEHICLE FOUR TIMES, HOWEVER, THEY WERE UNABLE TO DUPLICATE THE FAILURE. THE DEALER REFUSED TO MAKE ANY REPAIRS. THE FAILURE MILEAGE WAS 8,000 AND CURRENT MILEAGE WAS 23,000.
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.