2012 Toyota Prius electrical system problems
52 owner complaints filed with NHTSA name the electrical system on the 2012 Toyota Prius — 12% of all complaints for this model year.
What owners report
“Odometer Fraud. The contact purchased a 2012 Toyota Prius. The contact stated that while attempting to register the vehicle, it was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 187,000, and at the time of…”
filed Apr 10, 2026
“While driving, the vehicle experienced a sudden brake system malfunction without prior warning or gradual degradation. The vehicle was being operated under normal driving, road, and weather conditions. No recent brake service, repairs, or aftermarket modifications had been performed prior to the…”
filed Dec 25, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other Prius years
| Year | Reports | Share |
|---|---|---|
| 2024 Prius | 3 | 14% |
| 2022 Prius | 6 | 25% |
| 2019 Prius | 4 | 14% |
| 2018 Prius | 2 | 6% |
| 2017 Prius | 11 | 12% |
| 2016 Prius | 20 | 13% |
| 2015 Prius | 27 | 17% |
| 2014 Prius | 33 | 16% |
| 2013 Prius | 50 | 12% |
| 2011 Prius | 68 | 13% |
| 2010 Prius | 192 | 7% |
| 2009 Prius | 60 | 12% |
Other reported problem areas on the 2012 Toyota Prius
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.