2010 Toyota Prius. Consumer states two brake system failures the consumer stated the vehicle began making an unusual sound and after a few days, numerous warning lights appeared on the dashboard announcing a failure of the braking system. The vehicle was towed to the dealer. An inspection revealed the master cylinder, booster and ECU needed to be replaced. The consumer paid $ $3,246.83 for the repairs. However, nine days later, the unusual brake pedal sound returned, but the brakes worked and no warning lights appeared. The next day, the brake system completely failed while his daughter was driving the vehicle. Again, the vehicle was towed to the dealer, where the technicians determined the vehicle needed a new brake booster assembly. The consumer was informed he would only be responsible for the labor costs of $ $255.48. The consumer believed the booster and brake booster were the same part, which was supposed to have been replaced several days prior.

- White Plains, NY, USA

The contact owns a 2010 Toyota Prius. While driving approximately 20 mph the contact depressed the brake pedal and it fell to the floor board. The contact was able to avoid crashing into several vehicles he turned onto a sidewalk and hit a street lamp, which then crashed on top of the vehicle, causing extensive damage. A police report was filed. The police officer inspected the vehicle and confirmed the brakes had failed. The vehicle was towed to an auto body shop. The vehicle was included previously in the recall under NHTSA campaign id number: 10V039000 (service brakes, air:anti-lock:control unit/module) and had the recall repairs performed. The vehicle was not repaired. The approximate failure mileage was 8,190....updated 12/03/12 updated 01/11/12

- Verona, NJ, USA

The contact owns a 2010 Toyota Prius. The contact stated that whenever she drove over a pot hole or railroad tracks the braking system did not function properly. The vehicle was taken to an authorized dealer who stated that the failure was due to a design flaw. The vehicle was not repaired. Updated 10/28/10. Updated 10/28/10

- Olympia, WA, USA

The contact owns a 2010 Toyota Prius. The contact stated when driving downhill and attempting to brake, the brakes would not engage and intermittently could not be depressed. The contact had received repairs under NHTSA recall campaign id number: 10V039000 (service brakes, air: Antilock: Control unit/module). The dealer was unable to duplicate the failure and no further repairs were made to the vehicle. The manufacturer was contacted via email and the contact was awaiting a response. The failure persisted. The failure mileage was 5,000 and the current mileage was 9,000. Updated 07/06/10. Updated 11/15/10 the consumer stated there is still a delayed response in the braking mechanism when going down hills. Updated 11/24/10

- Orange, CA, USA

The contact owns a 2010 Toyota Prius. The contact stated when driving over a pot hole or any uneven road surface, the vehicle would exhibit a delay in braking. The brakes would hesitate to engage when depressed. The dealer advised the vehicle was under NHTSA recall campaign id number 10V039000 (service brakes, air; antilock: Control unit/module) and received the recall repairs. The failure persisted after repairs. In addition, the brakes would sporadically become stuck when braking in reverse and the then would begin to jerk violently. The vehicle was not further repaired. The failure mileage was 9,000 and the current mileage was 11,786.

- Sandiego, CA, USA

The contact owns a 2010 Toyota Prius. The vehicle was previously repaired under NHTSA campaign id number: 10V039000 (service brakes, air:antilock:control unit/module). After retrieving the vehicle form the authorized dealer, the vehicle would exhibit an increased stopping distance when braking from lower speeds. The failure began to recur intermittently. The failure mileage was 3,000 and the current mileage was 14,000.

- Stoughton, MA, USA

The contact owns a 2010 Toyota Prius. The contact received a recall notice for recall 10V039000 (service brakes, air:antilock:control unit/module) which was performed. However, the contact stated that the problem still occurred and whenever she drove over a bump in the road or an uneven surface and depressed the brake pedal, there was a loss of braking and the vehicle would lurch forward. The vehicle had not been taken back to the dealership at the time of the complaint. The failure mileage was approximately 7,500. The current mileage was approximately 10,000.

- Chicago, IL, USA

The contact owns a 2010 Toyota Prius. While driving at speeds of 5 mph over a pothole with the brakes applied, the vehicle did not stop. The dealer was contacted but did not provide any assistance. The vehicle was not repaired or diagnosed. The failure and current mileages were 5,800. Updated 08/13/10. Updated 08/23/10

- Arlington , VT, USA

The contact owns a 2010 Toyota Prius. The contact stated that the vehicle was taken to the dealer for repairs under NHTSA recall campaign id number 10V039000 (service brakes, air: Antilock: Control unit/module). Since the vehicle was repaired the brake pedal would fall onto the floorboard when the brakes were applied. There was a hesitation in brake engagement and the contact had to use the emergency brakes in order to stop the vehicle. The manufacturer was contacted but would not provide any further assistance. The VIN was not available. The failure mileage was 9,000 and the current mileage was 12,000.

- Chicothe, OH, USA

The contact owns a 2010 Toyota Prius. The contact was driving approximately 40 mph on wet road conditions and encountered a pothole. The brakes were engaged with a delay response period between 5 to 10 seconds. The vehicle was able to slow down and continued to travel. The vehicle had a prior recall repair on March 1, 2010 under the NHTSA campaign id number 10V039000 (service brakes, air: Antilock: Control unit/module). The remedy repair was insufficient and failed to correct the problem. The manufacturer was notified of the malfunction. The contact was waiting for a response from the manufacturer for resolution. The failure and current mileages were 4,860.

- Raleigh , NC, USA

The contact owns a 2010 Toyota Prius. The contact was driving approximately 25 mph on a rough road surface and over a pothole. When the brake pedal was applied, the vehicle surged forward with no power response. The vehicle was taken to the dealer for a recall software repair. The NHTSA campaign id number was unknown. The contact was uncertain of the recall remedy. The failure continued to occur after the recall repair was performed. The brakes were engaged four to five times without a response. The contact was expecting a response from the manufacturer within the next two days. The failure mileage was 11,000.

- Mt. Kisco, NY, USA

The contact owns a 2010 Toyota Prius. The contact stated he previously received repairs under NHTSA campaign id number 10V039000 (service brakes, air: Antilock: Control unit/module). Prior to the recall, the contact had experienced a delay in brake response when traveling over rough road surfaces. Following repairs, the failure persisted but would occur on various road surfaces, including flat and dry surfaces. The failure mileage was 6,800 and the current mileage was 7,300. The VIN was not available. Updated 06/29/10

- North Aurora, IL, USA

2010 Toyota Prius III. The consumers daughter was involved in an accident. The brakes did not stop the vehicle when they were applied. She collided with the vehicle in front of her, which then hit another vehicle.

- Encino, CA, USA

The contact owns a 2010 Toyota Prius. The contact was driving approximately 7 mph on a bumpy road surface. When the brakes were engaged the vehicle surged forward. Whenever traveling between 55 mph on bumpy road conditions the failure occurred intermittently. The vehicle was taken to an authorized dealer. The technician was unable to duplicate the failure. The vehicle had prior recall remedy associated with NHTSA campaign id number 10V039000 (service brakes, air: Antilock: Control unit/module). The failure occurred after the recall service repair was performed on the vehicle. The failure mileage was 11,000. The current mileage was 12,657.

- Milford, MI, USA

The contact owns a 2010 Toyota Prius. While driving the vehicle at a speed of 25 mph, the vehicle continued to accelerate even after the brake pedal was applied when driving on a rough or bumpy surface. This incident occurred about forty times since the vehicle was purchased. The vehicle was taken to the dealership on two occasions. On the second visit to the dealership, the dealer updated the computer software in the vehicle. However, the update did not remedy the problem. The current and failure mileages were approximately 11,000.

- Arlington, VA, USA

2010 Toyota Prius. Consumer states brake failure in which the malfunction happened twice and caused an accident. The consumer stated the factory defect was not brought to light until after the second incident. Although, Toyota corrected the brake issue, the consumer has costs and outstanding problems with the vehicle because of the damage done in first incident, including problems with the wheel bearing. The consumer is requesting Toyota reimburse him for monies paid to fix the vehicle and also to fix the wheel bearing that was not identified and not replaced. The consumer stated the first incident happened when he was about to make a right turn. There was snow on the roads and as he was making the turn, traveling about 9 or 10 mph, he started sliding toward the curb on the other side. He tried to brake, but he continued to slide. An instant before he hit the curb, the anti-lock brakes activated, but it was too late. He slid into the curb with the wheel turned, broke the wheel rim and flattened the tire. The second failure occurred when he was coming out of a mall parking lot heading toward a main street. The consumer stated he was coasting to the stop sign and applied the brakes, but nothing happened. He pushed them as hard as he could and again at the last second the anti-lock brakes activated.

- Owatonna, MN, USA

The contact owns a 2010 Toyota Prius. While the contact was driving 5 mph traveling over an icy road surface, the brake pedal was engaged causing the vehicle to slide. Suddenly, the vehicle crashed into a snow bank. The anti-lock brake system was inoperable during the failure. There were no prior warnings. The vehicle has not been diagnosed by the dealer. The current and failure mileages were 400.

- Omaha, NE, USA

The contact owns a 2010 Toyota Prius. While driving at speeds of approximately 25 mph on normal road conditions, the engine stalled without warning. After several attempts, the engine was restarted and the vehicle resumed normal operation. The dealer was contacted in regards to the failure. Recently, the vehicle was repaired per NHTSA campaign id number 10V039000 (service brakes, air: Antilock: Control unit/module). The contact was concerned that the recall repairs were insufficient and potentially caused the recent failure. There were no further repairs. The failure mileage was 6,905 and the current mileage was unknown.

- Hidden Hills, CA, USA

-the contact owns a 2010 Toyota Prius. The contact was driving approximately 45 mph. When braking there was a delay response. The failure occurred three days after the recall remedy repair was performed on the vehicle. The recall was under NHTSA campaign id number 10V039000 (service brakes, air: Antilock: Control unit/module). The manufacturer was notified of the malfunction and there was no resolution. The failure mileage was 11,000.

- East Setauket, NY, USA

The contact owns a 2010 Toyota Prius. While driving at 20 mph traveling over a pot hole the contact noticed that the vehicle had suddenly accelerated without warning. In order to stop the vehicle the brakes were applied. The failure mileage was 3,500 and the current mileage was 3,700.

- Cardiff, CA, USA