There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2003 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 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)THE LIMITED SLIP DIFFERENTIAL HAS FAILED AT APPROXIMATELY 81,000 MILES. I'VE BEEN INFORMED THAT REPAIR PARTS ARE NOT MANUFACTURED AND THAT A NEW DIFFERENTIAL MUST BE INSTALLED. THERE ARE NONE IN STOCK IN THE UNITED STATES AND THEY ARE ON BACK ORDER INDEFINITELY. THERE IS NO TIME ESTIMATE OF ANY KIND TO GET THIS PART IN THE UNITED STATES. MY ONLY OPTION IS TO FIND AND INSTALL AN USED DIFFERENTIAL. *TR
WHEN STARTING OUT COLD FROM AN INTERSECTION MY 2003 MAZDA MIATA LURCHES FORWARD POSSIBLY CAUSING STALLING IN THE INTERSECTION AND CAUSING AN ACCIDENT. THIS COMPLAINT HAS BEEN ADDRESSED TO MY DEALER WHO SAYS THAT MAZDA WILL ONLY FIX THIS PROBLEM DURING THE FIRST 12 MONTHS./12,000 MILES OF OWNER SHIP. MAZDA HAS HAD THIS PROBLEM SINCE 2001 AS A RESULT OF A RE-DESIGN OF THE CLUTCH AND REFUSES TO FIX MY CAR BECAUSE IT IS BEYOND 12,000 MILES. THIS IS A LATENT DEFECT THAT ONLY MANIFESTS ITSELF I COLD WEATHER BUT I AM CONCERNED THAT SOMEONE MAY BE SERIOUSLY INJURED OR KILLED AS A RESULT OF THIS DEFICIENT CLUTCH SYSTEM. *JB
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.