Partial brake failure caused by faulty brake booster and actuator. Vehicle was in motionn on roadway when loss of braking suddenly happened.

- Port St Lucie, FL, USA

The contact owns a 2013 Toyota Prius V. while driving approximately 20 mph and attempting to brake, the vehicle did not stop and the tire pressure monitoring system, anti-lock, brake, and electronic stability control indicators illuminated. The vehicle was towed to john elway's crown Toyota (1201 kettering dr, Ontario, ca 91761) where it was diagnosed that the brake booster/brake booster pump and master cylinder needed to be replaced. The vehicle was not repaired. The vehicle was taken to an independent mechanic who determined that the vehicle had a software failure. The manufacturer was not notified of the failure. The approximate failure mileage was 106,853. The consumer stated the vehicle over heated. The hybrid battery pack needed to be replaced and the was also an issue concerning the electric pump assembly. A recall repair was completed on the vehicle that caused issues with the master cylinder and brake booster pump assembly. The consumer has since not driven the vehicle.

- Ontario, CA, USA

This has happened five times now, thus far only on a level surface. Starting with the car off and parked with the parking brake on. I depress and hold the brake pedal with my right foot. Start the car by pressing power. While continuing to hold the brake pedal I depress and release the parking brake to disengage it. Then, still with my foot on the brake pedal, I shift into reverse. Instead of remaining still the car rolls backwards. Immediately depressing the brake pedal farther does not cause any braking. I have instinctively removed my foot from the pedal completely and then depressed the pedal again. The second attempt has always resulted in braking. Fortunately this has occurred only when there has been no traffic or obstacle behind the car but it is greatly concerning, particularly on san francisco hills, to worry that the brakes will not function when shifting into gear from park. Further there seems to be no warning when the brakes may malfunction. I can only tell the brakes aren't working when it starts rolling backward under power.

- San Francisco, CA, USA

My wife started her car this morning, put it in park and then stepped out to get the mail. The vehicle unexpectedly moved forward running her over and pinning her leg underneath. She is currently at the hospital being checked for internal injuries. Has this been reported and if so, why not fully reported?

- Sacramento, CA, USA

The ABS/regen/hydraulic braking conflict on 3rd gen prius' previously documented, is getting worse as my car ages. It was only slightly apparent in the first 2 years but is getting progressively worse. The brakes let go on constant brake pressure when the front wheels lose traction: Wet road, bumps, train tracks, gravel, uneven road surface, speed bumps, etc..previous models were subject to a recall. Brake problem documented here: Toyota-Alabama.com/Alabama-engineer-tackles-prius-brake-issues-and-discovers-potholes/; this now occurs on a daily basis, but I have inputted the event date as 1/1/17.

- Towson, MD, USA

The contact owns a 2013 Toyota Prius V. while driving at approximately 60 mph, the brakes activated independently and caused the vehicle to rapidly decelerate. In addition, the seat belt tightened without being used. The vehicle was taken to a dealer where the failure was undetermined. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 62,000....updated 04/11/16

- Sykesville, MD, USA

Second of two accidents. Braking distance appears severely compromised. Unable to stop within a reasonable distance.

- Gloucester, VA, USA

While traveling on a local interstate, I had to use the brakes because traffic in front of me had slowed. When pressing the brake pedal it went all the way to the floor and at the same time two different warning lights on the dash illuminated; the ABS light and the brake failure light. I managed to slow the vehicle using the emergency brake and engine compression. Car was towed to a local Toyota dealership and they was not able to identify the problem. They state that when they checked the car the next morning the car had brakes. However, when the service tech performed a test drive later that day, she would not release the vehicle because again the brakes failed but again when further tested, this prius again had normal brakes. The ECU software was updated and I was told that was the issue but that is not possible. The car is unsafe to drive, . this issue needs to be investigated because if this prius has the defect so do others.

- Aledo, TX, USA

We rented a Toyota prius from enterprise in shreveport la at the airport. We drove to kilgore tx for the shakespeare festival. In kilgore, the driver with one passenger attempted to enter a diagonal parking space in front of a strip mall. Upon approach, going approximately five miles per hour or less, the car's brake pedal went to the floor, with no braking happening. The car then surged into the parking space, up over the curb, and into the corner of a store, causing extensive injury to passenger side and passenger, minor injury to driver, and extensive injury to the building. Police records state that "at the scene, I checked the brakes of the vehicle both running and not running and fond there was little or no resistance while threatening pressure to the brake pedal. I observed the brake pedal go all the way to the floor and heard a metallic grinding. This lead me to believe the brakes did not function properly at the time of, or immediately prior to the accident."

- Edgewater , FL, USA

With my foot on the brake, coming to a stop at a stop sign, we went over uneven pavement and the car lurched forward while only a few feet from the crosswalk. Braking to a stop at an intersection - the road is dry and flat. The car's traction control/slippery icon comes on. Car is parked in an underground parking lot. Start car and reverse out of parking spot when the car suddenly stops and losses power. Had to start car again and the slippery icon comes on and car wouldn't go into gear. Power on and off a few times before car went into gear.

- Fort Pierce, FL, USA

Was going down hill at 40mph the light turned red I tried to stop I pumped the brakes twice then twice again the lain to my life was full to my right was a curb about 13in height and by then we were in the back end of the car in front of us and no air bags I don't know when air bag deploy or at what speed I thank god for other cars back ends that we can hit and not kill any one I guess.

- Cheyenne, WY, USA

2013 Prius V - brand new. Brakes make a grinding noise when cold. Three different Toyota dealerships told me that it is normal for the brakes to grind when cold. Nothing they could do about it. Vehicle now has 15,000 miles on it and it still makes grinding noises when cold. I had a 2010 prius and had no problems with it. Found on the Toyota owners website there are several others with the same problem. One of them had the seattle Toyota dealership fix the problem: Toyota of seattle 1,379 service details rear brake noise when cold Prius V R&R both calipers, R. dsc 1-sd (on-veh) comb: Opposite side there is a fix and Toyota is refusing to fix the problem. Please issue a recall for this problem before the grinding brakes become a loss of braking action and accidents occur.

- Fairfax, VA, USA