2015 Toyota Prius V service brakes problems
12 owner complaints filed with NHTSA name the service brakes on the 2015 Toyota Prius V — 50% of all complaints for this model year.
What owners report
“The brake booster assembly failed, as many of these models had before. A bunch of codes went off as I was driving and the brakes did not function properly. Toyota had an extended warranty for this which they discontinued last year and they would extend no good will towards the $4,000 repair”
filed Sep 2, 2026
“Emergency Brake, Traction and ABS warning came on and stayed on in addition to a five-second interval cycling on of a motor sound under the hood. O'Reilly Auto Parts and then Toyota dealership confirmed the same code that indicated brake booster assembly needs replacing (C1391) **This is a "known…”
filed Oct 28, 2025
“Brake light + ABS + traction light came on and the brake became harder to control. I was driving in the rain and briefly lost control. Fortunately, no accident.”
filed Jul 7, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Service Brakes problems in other Prius V years
| Year | Reports | Share |
|---|---|---|
| 2014 Prius V | 38 | 46% |
| 2013 Prius V | 64 | 52% |
| 2012 Prius V | 124 | 57% |
Other reported problem areas on the 2015 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.