2015 Toyota Prius problems and complaints
Owners have filed 165 complaints with NHTSA about the 2015 Toyota Prius. The most-reported areas: Service Brakes (92), Electrical System (27), Unknown Or Other (15).
Key takeaways
- 165 owner complaints on file with NHTSA.
- 29 involve a crash, 1 a fire, 17 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Service Brakes | 92 | 56% |
| Electrical System | 27 | 16% |
| Unknown Or Other | 15 | 9% |
| Power Train | 13 | 8% |
| Engine | 8 | 5% |
| Exterior Lighting | 7 | 4% |
| Vehicle Speed Control | 7 | 4% |
| Forward Collision Avoidance | 6 | 4% |
| Structure | 6 | 4% |
| Fuel/Propulsion System | 6 | 4% |
| Air Bags | 6 | 4% |
| Hydraulic | 4 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2015 Toyota Prius 5 HB FWD | 4/5 | 4/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Service Brakes - filed 2026-09-17
I am reporting an active, severe safety hazard regarding the braking system on my 2015 Toyota Prius ( Mileage: 79,000). The vehicle has been officially diagnosed by Toyota Culver City with Diagnostic Trouble Code DTC C1391, confirming an internal failure and lack of pressure within the brake booster/actuator assembly. ...
Service Brakes - filed 2026-08-31
Problem: Brake Actuator is pulsing the Booster Pump to keep running intermittently, 5-10 seconds. Console lights lit up for ABS problem. Does not clear. Toyota Dealership Report: DCT C1391 Abnormal Leak: Monitored TEH Accumulator Pressure and its not holding pressure. Pump keeps running. Rec[ommend] Brake Actuator...
Service Brakes - filed 2026-08-26
On XXX, I was driving my 2015 Toyota Prius with my family in the vehicle and approaching stopped traffic on dry pavement. An emergency vehicle was approaching from behind, so I began braking earlier than usual. When I applied the brakes, the vehicle did not stop normally. The front slowed/stopped while the rear of the ...
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More for the 2015 Toyota Prius
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.