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What 516 owners told NHTSA about the 2011 Toyota Prius

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 (516)Crash / fire / injury (44)Brakes (270)Electrical system (68)Lights (49)Airbags (46)Engine (46)Speed control (28)Transmission & drivetrain (18)Electronic Stability Control (esc) (16)Visibility & wipers (13)Fuel system (11)

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Working with the data? Download all 516 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 2011 Toyota Prius verdict →