*Median odometer reading when the problem happened, where owners gave one. One complaint can name several problem areas.
Service brakes
Dashboard Warning Lights: ABS, VSC, Parking Brake Light, Triangle with Exclamation Point, Codes: C1256 & C1391, Intermittent Audible Cabin Buzzing indicating critical pressure loss on start-up for about 10 seconds...then stops, not loss so much as anti-braking quick bursts at about 5 mph of stopping v slowly and seamlessly coming to a stop. I contacted Toyota Corporate Case Management; they refused to escalate or remediate the issue due to vehicle mileage, despite being notified of the active brake pressure leak codes and the audible safety alarm.
Dec 10, 2025Service brakes
I own 2 2009 Toyota Prius. Both cars less than 175,000 miles and both have failed ABS modules. The ABS module in this vehicle is also the power brake booster. This failure can cause braking issues such as loss of braking or sudden brake application. Only known fix is replacement of the ABS brake module which requires the Toyota Techstream service computer.
Apr 25, 2026Service brakes
Brake actuator is broken. Toyota knew about this problem and they had a warranty for 10 years or 150k miles. Mine only has 80k miles. The repair is half of what the car is worth. I thought a Toyota with such low miles would be dependable. Toyota knew that people have died from this problem with their car. I need this car to get to work and get my kids to school. Itâs older than 10 years so I am just screwed on something they knew was broken. Of course the sales person at the Toyota dealership did not tell us about it when he sold us the car
Mar 24, 2026Service brakes, hydraulic
The contact owns a 2009 Toyota Prius. The contact stated that while driving at an undisclosed speed, the brake pedal was depressed; however, the vehicle failed to stop as intended. The contact stated that the ABS warning light was illuminated. The vehicle was driven to the residence. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The dealer was made aware of the failure. The contact was informed that the extended warranty had expired. The manufacturer was made aware of the failure, and a case was filed. The contact was informed that the extended warranty had expired. The failure mileage was approximately 174,000.
Mar 26, 2026 · 174,000 milesUnknown or other
Cooling system
Aug 14, 2025Service brakes
The brake actuator is failing. Itâs making unusual noises when stepping on the brakes. A new additional noise started in the last month which is the pump connected to the brake actuator. The technician told me the brakes are about to fail. Toyota used to cover this issue but stopped a few years ago. Itâs a $3,000.00 job at the dealer.
Feb 1, 2025Forward collision avoidance › Automatic emergency braking
Breaking system failure do to ASB Actuator, breaks are locking and vehicle is engine braking.
Feb 11, 2025Unknown or other
When I am coming to a stop or need to put on my brakes my car will accelerate at a jump ahead pace As if to take off instead of slowing down and stopping. Regardless whether Iâm turning a corner or Iâm continuing straight when I have to Put on the brakes it speeds up instead.
Feb 5, 2025
Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.