*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Engine
The catalytic converter heat exchanger failed internally, causing coolant to leak into the exhaust system. Symptoms included white smoke from exhaust and coolant loss with no visible ground leak. This is a documented factory defect per Toyota Technical Service Bulletin T-SB-0135-19 affecting 2016-2019 Prius models. Toyota has denied warranty coverage despite the vehicle was originally bought & spent its entire prior operational life registered in New York, a state covered under Toyota's full 15-year/150,000-mile emissions warranty. Defect was confirmed by an authorized Toyota dealership, in PA. Vehicle had approximately 83,104 miles at time of diagnosis. Manufacturer denied coverage and is…
May 19, 2026Electrical system › Instrument panel › Speedometer/odometer
Odometer Fraud. The contact purchased a 2017 Toyota Prius. It was discovered when the contact listed the vehicle for sale that there was a mileage discrepancy. The vehicle was as a private sale. At the time of the purchase, the mileage was 126,611. The potential purchaser provided a CARFAX report that recorded the mileage on 11/6/2024 at 225,810.
Sep 10, 2025 · 225,810 milesFuel/propulsion system
During hot temperatures and after coming to a full stop, the car stalls/hesitates significantly (5-6seconds) when pushing the gas pedal. The car eventually proceeds but the issue reoccurs. It can only be intermittently reproduced and no codes are shown on the car dashboard. Mechanics are unable to identify the source of the issue so it cannot be resolved.
Jul 18, 2025Structure › BodyCrash
Standing at a red light and someone rear ended
Sep 23, 2024Engine and engine cooling
The contact owns a 2017 Toyota Prius. The contact stated that while driving approximately 25-30 MPH, the vents were blowing out cold air. The check engine warning light was illuminated. The contact was adding coolant to the coolant reservoir every three to four days. The vehicle was taken to the local dealer, where it was diagnosed and determined that the coolant was leaking into the exhaust pipe. The dealer recommended that the exhaust system front pipe be replaced. The manufacturer was contacted, opened a case, and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 81,700.
Feb 21, 2025 · 81,700 milesPower train
The contact owns a 2017 Toyota Prius. The contact stated while the contact's wife was driving at an undisclosed speed, the accelerator pedal was depressed. The accelerator pedal was depressed, however the vehicle failed to accelerate as intended. The contact stated that the vehicle stalled and jerked. The vehicle was driven to the residence. The contact stated that the battery indicator did not look as if the battery was charging. The contact stated that the vehicle was taken to two independent mechanics; however, the failure was not duplicated. In addition, the vehicle was taken to the dealer; however, the failure was not duplicated. The vehicle was not diagnosed or repaired by an…
Jun 17, 2024 · 68,000 milesEngine
Dear NHTSA, I am seeking assistance and compensation for ongoing warranty and repair issues with my Toyota Prius. Key Incident Timeline: â¢March 21, 2024: Dashboard message âGrille Shutter Inoperableâ â¢March 25, 2024: Toyota of Glendale visit â¢Charged $220 for diagnostics â¢Refused to honor service bulletin â¢Vehicle mileage: 149,217 Customer Service Interactions: â¢April 9, 2024: â¢Contacted Toyota customer service â¢Confirmed CA emissions coverage to 150,000 miles â¢Discovered extended warranty unexpectedly canceled Brand Engagement Claim: â¢April 9, 2024: Filed claim with Toyotaâs Brand Engagement line â¢June 26, 2024: Claim denied, dealershipâs decision upheld…
Mar 21, 2024Unknown or other
While driving the speed limit of 70mph on a major highway, the sunroof on my 2017 Toyota Prius exploded. There was no warning of any kind: no other traffic nearby so no rock or debris from another vehicle; no overpass or bridge so nothing from above; it was a mild sunny day of 76 degrees so not a weather factor; and by the angle of the glass that remains being in an outward position rather than inward, reveals to me that it was from inside out, not from outside in as if it were a rock hitting. It just exploded. I was the only person in the car. Thankfully, the visor was shut on it or the shattered glass would have caused injury and of greater serious concern is just the sudden sound of what…
Jul 21, 2024
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.
