2012 Toyota Prius service brakes, hydraulic problems
12 owner complaints filed with NHTSA name the service brakes, hydraulic on the 2012 Toyota Prius — 3% of all complaints for this model year.
What owners report
“The contact owns a 2012 Toyota Prius. The contact stated while driving at an undisclosed speed, several unknown warning lights illuminated, with an abnormal sound coming from the vehicle. The vehicle was taken to the dealer where it was diagnosed with brake booster failure. The contact was informed…”
filed Mar 4, 2026
“The contact owns a 2012 Toyota Prius. The contact stated while driving 30 MPH, the ABS and traction control warning lights illuminated. The contact stated that while attempting to depress the brake pedal, the vehicle hesitated while responding. The contact stated that there was a buzzing sound…”
filed May 16, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Service Brakes, Hydraulic problems in other Prius years
| Year | Reports | Share |
|---|---|---|
| 2022 Prius | 1 | 4% |
| 2019 Prius | 1 | 3% |
| 2016 Prius | 1 | 1% |
| 2015 Prius | 4 | 2% |
| 2014 Prius | 8 | 4% |
| 2013 Prius | 6 | 1% |
| 2011 Prius | 12 | 2% |
| 2010 Prius | 849 | 30% |
| 2009 Prius | 91 | 18% |
| 2008 Prius | 171 | 11% |
| 2007 Prius | 145 | 7% |
| 2006 Prius | 94 | 7% |
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.