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What 32 owners told NHTSA about the 2020 Mazda Mazda3 Sedan

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (32)Driver assistance (15)Brakes (3)Electrical system (3)Steering (3)Fuel system (2)Lane Departure (2)Suspension (2)Body & structure (1)Engine (1)Equipment (1)

2 of 32 complaints match · Fuel system · clear filters

Jul 2, 2026Fuel system

Low pressure fuel pump failure with 75,575 miles on odometer. Fuel pump completely seized. Car was parked at a retail location and would not start. Upon troubleshooting, mechanic was able to determine the low pressure pump was not delivering fuel. Pump was replaced. Faulty fuel pumps could lead to hazardous conditions as they are mounted within the fuel tank. I feel this is too early in the vehicles life for this component to have completely failed.

NHTSA ODI 11748076

Aug 13, 2022Fuel system

Fuel pump, car dying out, can't turn off brake release from when it dies. Shaking when accelerating. Fuel gas issue.

NHTSA ODI 11479130

Working with the data? Download all 32 complaints as CSV · fetched from NHTSA July 18, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2020 Mazda Mazda3 Sedan verdict →