Problems · NHTSA complaints

2015 Toyota Prius Plug-in Hybrid problems

Owners filed 120 complaints about the 2015 Toyota Prius Plug-in Hybrid with NHTSA between Jan 2015 and Nov 2025. The most-cited component is service brakes (51).

Complaints
120
Filed with NHTSA
Crashes
26
Reported by owners
Fires
1
Reported by owners
Injuries
13
People reported injured
Deaths
3
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Service brakes51
  2. Electrical system23
  3. Power train13
  4. Vehicle speed control8
  5. Exterior lighting7
  6. Fuel/propulsion system6
  7. Structure6
  8. Engine6
  9. Air bags6
  10. Visibility/wiper4
  11. Hybrid propulsion system3
  12. Steering3
  13. Suspension3
  14. Seat belts2

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 6, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
201511
201614
201710
20188
201912
202010
202111
20227
20236
20249
202522

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Service brakes

51 reports11 crashes
“The ABS, BREAK, and Traction Control, suddenly turned on when I was traveling on the freeway in mild traffic. I was traveling at about 60-65 mph. I attempted to use the breaks and could feel a substantial difference in how much and how hard I had to push in order to stop. The problem has not been confirmed by a dealer or service center. The vehicle was inspected by my brother in law who works on cars frequently. There were no warning symptoms prior to the problem. The problem first occurred on Saturday November 1st at about 12:30. According to my brother in law, it was the break pump that failed; you can hear air escaping when you push on the break pedal.”
Owner complaint to NHTSAFiled Nov 3, 2025Service brakesODI 11697250

Electrical system

23 reports4 crashes1 fire
“The headlight bulbs keep going out. I have replaced the bulbs at least 2-3 times a year for the past few years. I have asked dealers about this and they tell me there is no recall or tsb. This is a hazard to night driving because of decreased illumination, especially in dark roads with not enough lighting. Please recall/fix this issue!!”
Owner complaint to NHTSAFiled Feb 13, 2025Electrical system, Exterior lightingODI 11642400

Power train

13 reports4 crashes
“My mom was involved in an accident in her 2015 Toyota Prius on April 19, 2022, which she advised lurched forward at a stop and when applying the brakes to stop the vehicle, she said was unresponsive, causing her to clip a vehicle and sending her vehicle into a ditch totaling her car and injuring her passenger and her. I would like to have this investigated and hold Toyota responsible. This could have been much worse and lives could have been lost. She is now without means of transportation, and she is now possibly responsible for damages to property and bodily injury because of this. Through my research I have discovered multiple class action lawsuits brought against Toyota for the same exact models. I asked the police officer to run a scan on the computer, but he advised it was only for serious accidents. There was no indication of the problem or messages.”
Owner complaint to NHTSAFiled Apr 26, 2022Power train, Service brakes, Fuel/propulsion systemCrash reportedODI 11462365

Vehicle speed control

8 reports7 crashes
“ANYTIME I CHANGE ELEVATIONS THE ENGINE SEEMS TO REV WHEN IT IS IDLING ON CRUISE CONTROL. ON THE DOWNHILL, THE CAR WILL ACCELLERATE TO IGNORE THE SPEED ON CRUISECONTROL TO DANGEROUS HIGH VELOCITY. I REPORTED THIS TO TOYOTA OF NORTH HOLLYWOOD THREE TIMES... IT WAS NEVER ADDRESSED.”
Owner complaint to NHTSAFiled Aug 28, 2020Electrical system, Vehicle speed control, EngineODI 11351905

Exterior lighting

7 reports1 crash
“My vehicle has an ongoing issue with the headlights not being bright enough to drive at night with. I have replaced the headlights more than 5 times now over the course of a year, each time with different brands including Toyota OEM headlights. Each time, they are still not sufficiently bright enough to see with at night. This has led to 3 collisions with curbs and objects which caused damage to my vehicle, because I could not see the objects while having to drive at night. I have brought the issue up to Toyota and they said they would not do anything about it. I brought it in for service to Toyota and they tried to charge me $200 to even look at it, money which I do not have. I am forced to continue driving at night for work and fear I will get into a more serious crash or hit a pedestrian as the headlights aren't bright enough to see safely at night. The photo I have included shows a gash in the tire and dent in the rim where it hit the curb. The issue seems to be the headlight wiring or connectors. When I replace the headlight bulbs, they are a bit brighter initially. Thus initial brightness only lasts about a week, and it's still not sufficiently bright to…”
Owner complaint to NHTSAFiled Jun 18, 2024Exterior lightingCrash reportedODI 11595133

Fuel/propulsion system

6 reports1 crash
“I am having a hybrid propulsion system issue due to a part that was recalled according to this ID number for the NHTSA 17V718000 that was posted NOV 14, 2017 and my car does seem to be affected because it is facing the same issues as other cars reported from that batch. I want to make sure that I can have it serviced properly at my dealership”
Owner complaint to NHTSAFiled Jul 27, 2025Fuel/propulsion systemODI 11676437
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 6, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.