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What 32 owners told NHTSA about the 2020 Mazda Mazda3

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)

1 of 32 complaints match · Body & structure · clear filters

Jan 8, 2021Body & structure

WATER COMING INTO CABIN FROM DRIVER DOOR WINDOW. BROUGHT IT TO MAZDA SERVICE CENTER THREE TIMES AND THEY CANNOT FIGURE OUT WHERE WATER IS COMING FROM. WATER POOLS IN THE DOOR WHEN IT RAINS AND SEEPS INTO THE CABIN.

NHTSA ODI 11387164

Working with the data? Download all 32 complaints as CSV · fetched from NHTSA July 10, 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 verdict →