2012 Toyota Prius V service brakes problems
124 owner complaints filed with NHTSA name the service brakes on the 2012 Toyota Prius V — 57% of all complaints for this model year.
What owners report
“2012 Toyota Prius v with 89,662 miles. Multiple brake warning lights illuminated, and the vehicle stored diagnostic trouble code C1391, “Abnormal Leak in Accumulator.” The brake booster/accumulator pump is also cycling about every 13 seconds, even when the brake pedal is not being applied. The…”
filed Sep 9, 2026
“Brake actuator assembly failure on a vehicle with 99,818 miles. Whirring sound when braking followed by lighting of several brake alert lights on dash including PCS and ABS and others. The whirring noise has occured for several weeks, but the light indicators happened on 6/28/26. Toyota has an…”
filed Jun 29, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Service Brakes problems in other Prius V years
| Year | Reports | Share |
|---|---|---|
| 2015 Prius V | 12 | 50% |
| 2014 Prius V | 38 | 46% |
| 2013 Prius V | 64 | 52% |
Other reported problem areas on the 2012 Toyota Prius V
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.