There are 4 owner-reported fuel system complaints for the 2014 Mazda Mazda6in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
My 2014 mazda 6 EVAP system pops the p0451 when filling up gas to the first click. It goes away after a while if I take care to not fill up the tank all the way to the top. It is similar to a issue reported by recall 7414D for other 2014 mazda 6s. My car is not covered by the open recall, but it is experiencing similar issues. The p0451 goes on and off depending on how much i fill up the gastank.
The contact owns a 2014 Mazda Mazda6. The contact stated that while parked, there was a strong fuel odor coming from the vehicle. In addition, there was fuel leaking from the rear of the vehicle. The vehicle was taken to the dealer where it was diagnosed that the fuel pump needed to be replaced. The vehicle was not repaired. The VIN was not included in NHTSA Campaign Number: 14V170000 (FUEL SYSTEM, GASOLINE). The manufacturer was not notified of the failure. The failure mileage was 144,000.
The contact owns a 2014 Mazda Mazda6. The contact stated that on multiple occasions, the vehicle would stall upon the depression of the accelerator pedal as a fuel odor would emit from the vehicle. The check engine light would also appear on the instrument panel. The vehicle had been taken to an independent mechanic who replaced the fuel line O-ring seal on three separate occasions. The manufacturer nor the dealer had been notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 40,000.
TL* THE CONTACT OWNS A 2014 MAZDA 6. WHILE STANDING OUTSIDE OF THE VEHICLE, THE CONTACT DETECTED AN ABNORMAL FUEL ODOR. THE ODOR WAS NOT PRESENT INSIDE THE VEHICLE. THE CONTACT ALSO STATED THAT THE FUEL ECONOMY WAS DIMINISHED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE INSPECTED; HOWEVER, THE MECHANIC WAS UNABLE TO PINPOINT THE SOURCE OF THE FUEL ODOR. THE VEHICLE WAS SUBSEQUENTLY TAKEN TO ROMANO MAZDA (LOCATED AT 3120 ERIE BLVD E, SYRACUSE, NY 13214, (315) 446-9666) WHERE IT WAS DETERMINED THAT THE FUEL ODOR WAS DUE TO CORROSION BETWEEN THE FUEL TANK AND FUEL PUMP CONNECTION POINT. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE CONTACT WAS REFERRED TO NHTSA BY THE MANUFACTURER. ADDITIONALLY, THE CONTACT WAS INFORMED THAT THE VEHICLE WAS NO LONGER UNDER WARRANTY AND THERE WOULD BE NO ADDITIONAL ASSISTANCE. THE APPROXIMATE FAILURE MILEAGE WAS 67,000.
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.
Data synced from NHTSA on Apr 26, 2026