Car came out of the car wash and as I got ready to pull out the brake light came on and there was a rapid beep. Pushed on the brakes and felt no resistance like brakes did not exist. Had the car towed to the dealer (right Toyota on frank lloyd - scottsdale AZ) - dealer ran a software to fix it (part of a recall) but that did not fi X the issue. Dealer asked me to have hydro booster pump and the assembly replaced - they charged me $4200 for parts and labor. I was forced to pay as they said they tried to fix it throught he software but it did not. I feel that Toyota is repsonsible for the system failure - the brakes are critical - they suddenly stoped working. It could have been fatal if I was on the road when it happened. The failure should be gradual and there should be a certain warning if the pump was malfunctioning. I need your help in resolving this. Toyota should be responsibelf ro paying the invoice.

- Fountain Hills , AZ, USA

I have notice a definite release in braking action when my 2010 Prius goes over a patch of bumpy road, within 1 minute of leaving my home and going down the block. I experience this "release" of braking as a sudden brief acceleration that occurs while there is pressure on the brake pedal to slow down while going over the bumpy patch of road ( a 20 foot stretch of road with numerous shallow potholes). I bough this car used in September 2013. (it had 80,000 miles on it and a history of travel over gravel roads). On March 20, 2014, the local dealer did the E0E recall repair on the motor generator ECU and the power management ECU, to correct issues related to hard acceleration. At the same time, the dealer did the older Toyota recall repair on the brake pressure accumulator issue. I have not noticed this braking release issue later in the day. It seems to be most noticeable first thing in the morning, in the first minute or two of driving.

- Cedar Rapids, IA, USA

I had just pulled into the garage and was at a complete stop when the car surged forward and slammed into to the back of the garage, I would tip overattempted to stop the car with the brakes and they were not working so I shifted the car to reverse and it speed out of the garage up an embankment into a fence. It. was up on it's side and I was afraid that it would tip over so in an attempt to bring it down level I shifted to drive and it speed off forward it then jumped a row of bushes into the front yard and did a large circle in the front yard missing three large pine trees and hitting a small tree that ended up stopping the car and deployed the air bag.

- Evans , GA, USA

The Toyota dealer diagnosed a brake master cylinder and booster failure on our 2010 Prius at 27892 miles. Toyota declined to extend the brake recall that covered 2010 cars with a production date before November 2009. Our car has a March 2010 production date. Clearly Toyota was assembling cars with faulty brake master cylinders and boosters and they should extend the recall to cover those cars. The cost of the repair was $2760.

- Halfway, OR, USA

As I was coming to a complete stop at an intersection, the car jolted as if I was hit from behind and the brakes lost pressure resulting in me having to press the pedal all the way down to the floor. The brakes would not respond and I had to put the car in park to get it to stop. The same thing happened after I first got the vehicle in 2010. In Sept. 2010, the brakes did not respond, causing me to slide into the row and resulting in an accident. The car will also jolt when the brakes are pressed while driving over a pothole or bump. I took the vehicle in to have this check on 4/2/15 at Toyota of lewisville, in lewisville, tx. They claim that everything checks out fine on the brakes and they can not get it to replicate the jolt or pressure failure. Per Toyota of lewisville, the car did have a recall for the brakes, which was repaired at Toyota of irving, but the brakes are still exhibiting problems.

- Flower Mound, TX, USA

This brake problems has occurred many times. During application of the brakes at low speeds on rough road surfaces the car suddenly loses braking power for a brief time then starts to work again if the brake pedal remains depressed. This has almost caused accidents a number of times and is quite frightening. The car was brought in for the recall and safercar.gov states that there are no open recalls. When we bring this to the attention of the Toyota dealer we are told this problem is "normal" and there is nothing more they can do. (however, I understand that they fixed it in the next model year.) in my opinion this is an unsafe condition and it has been complained about online by other Prius owners. I ask the NHTSA to require Toyota to fix this in the name of safety.

- Newton, MA, USA

The contact owns a 2010 Toyota Prius. While driving at approximately 5 mph, the braking ability seized and the ABS warning light illuminated. The contact came to a complete stop and the vehicle had to be restarted. The vehicle was driven to the dealer who stated that the hydraulic system failed. The hydraulic master cylinder had to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 27,000.

- Halfway, OR, USA

It was raining and I was existing the I5 Ram, when I bumped the brake, the vehicle speeded up more, I continue to pump the brake, then the vehicle started drifting, then I tried correcting, but it didn't work, the vehicle kept on driving, for about 15 seconds come to stop by the wall of the I5, it then bounced vehicle backwards and finally the vehicle come to stop after the shift broke, causeing a totally crash, meaning, no matter how hared I step on the brake, it didn't stop, it felt like there was no brake system. I only bought the car for 6 days earlier, and it was my third time driving it. I have been a drive for 7 years and I have never had any incident.

- Des Moines, WA, USA

1 original recall did nothing concerning hitting a pothole and losing brakes for 20 +- feet..result..alway give yourself 20 extra feet and pray. 2 antilock on packed snow or ice results in total lost of brakes..result either drive into a snow bank or go through the red light and pray again. So I guess Toyota accepts the fact they choose to give you steering control to save yourself and hope you are not at a railroad crossing! there is no pulsating like other vehicles. 3 if you are stopped on ice /snow...without traction car does not rock..does not want to move... for study can a metal stud tire be made for priuses"?"would it help or sell car only in Florida..

- Matawan, NJ, USA

While driving around 70mph I had to hit the brakes hard but short. About 5 seconds later a bunch of warning lights came on and the vehicle became very difficult to stop. Pretty much had to stand on the brakes to slow down and then the brakes would lock up so I would get off the brakes and start the slowing/stopping process over again. This is the same failure mode (ABS accumulator nitrogen gas leaked into brake hydraulic fluid when accumulator cracked) as other cars (Prius and Lexus hybrids) that Toyota did recall but my car is outside of the current recall scope. If this was not in southern California's dry road a major incident could have taken place, especially with the grabbing/ locking up of the brakes.

- Hemet, CA, USA

Brake pedal loses pressure while braking over bumps in road. Pressure returns after bumps are passed. Recall issued and software fix provided by dealer in March 2010. Software fix didn't help. Similar condition has persisted since then. Bought vehicle new. Mileage and date when first noticed condition are estimates. After software fix, noticed condition again immediately.

- Champaign, IL, USA

This has happened several times over the past two years. As I brake at low speeds, the car surges ahead as though your foot is on the accelerator. Sometimes it was so subtle, you wondered if it really happened. Today (11/23/14) there was absolutely no mistaking it. The car surged forward a couple of feet as I was slowing to turn left. If someone had been stopped in front of me, I would have hit them from behind.

- Essex Junction, VT, USA

While applying the brakes to stop at an intersection one of the front tires was over a manhole cover and the car skidded over it like I was braking on a patch of ice. As soon as I was past the cover the brakes engaged and stopped the car. I noticed this occurring every time I would brake on an uneven surface where there was space between one of the front tires and pavement. I had bought the same make, model and year vehicle for my son 11 months later and noticed the same problem while test driving it. When I questioned the salesman about it I was told that it was the way the ABS works and that it was normal. On 11/20/2014 while checking the airbag recall list I noticed a recall for the same problem that I was having, recall announced 2/9/2010, NHTSA ref # 10V03900 so I called Toyota customer service 1-800-331-4331 and was told that neither cars' VIN# showed in the recall so it could not be happening and I would not be covered under the recall. They referred me to a Toyota dealer who told me that the fix which was (reprogramming of ABS control unit module) would not covered in the extended warranties of either cars. I should not be financially responsible for the diagnostics and repairs of a known safety problem which had a recall. I understand that it is not the dealers' fault and they shouldn't be held financially responsible either.

- Meriden, CT, USA

This is related to report receipt date: Feb 09, 2010 (I bought the car used in may, 2013). NHTSA campaign number: 10V039000 component(s): Service brakes, air - this happens all the time when the conditions are right. I complained to Toyota at the time that this car should have been in the recall list - it does exactly as described in this campaign description...the brakes release when braking over bumps or slippery surfaces. The first time I took it in, they said they could find nothing wrong, and they were 'working as designed'. I called Toyota today after reading more about this recall, and they told me I would have to take to service and give them a ride to show them how it happens. I don't understand why this car wasn't included in the recall. Any suggestions or assistance" are you still getting complaints about this"

- Columbia, MD, USA

This is a chronic problem with the car: When it hits rough terrain, the brakes do not react properly. There is a hesitation between the time the brake pedal is hit and the time the car slows. (there was an earlier repair/recall for this issue, and the initial problem -- also brake-related -- was helped; but this hesitation problem -- only on gravel or rough terrain -- resulted.) it will cause an accident eventually.

- Pittsburgh, PA, USA

I continue having this issue when braking over a bump or braking while turning. The car speeds up instead of slowing down when pressing the brakes. This is very dangerous issue and an cause an accident. I talked to Toyota who advice me to take it to the dealer. Dealer finds no trouble. I have reported this many times to my dealer and Toyota with nothing really done.

- Cypress, TX, USA

I continue to have a problem with braking when going over a bumpy surface. This has happened numerous times. Most recently, while driving over a bump in the road, I applied the brakes and the car lunged forward. Luckily, there was enough distance between my car and the car in front of me (which had also applied the brakes). I am afraid this will cause a serious accident someday. This has also happened at stop signs. I have complained to the dealership a few times and they act as if they don't know what I am talking about, which is ludicrous. I even mentioned the ECU recall/fix regarding the braking system and told them that my vehicle had the fix applied and they told me that the fix was not to address the problem I am describing. They insist that no one else has complained about it. I told them that I assume that they have been directed to tell customers that they know nothing about it. I see so many complaints regarding this issue and I don't understand why nothing is being done about it.

- Elmhurst, IL, USA

The contact owns a 2010 Toyota Prius. The contact stated that while driving down a hill at approximately 20 mph, the brake pedal was depressed and the brakes failed to respond without warning. The vehicle was towed to the dealer, who diagnosed that the brake booster pump leaked nitrogen into the master cylinder brake booster assembly that caused the failure. The vehicle was not repaired. The manufacturer was notified of the failure and informed that the VIN was not included in NHTSA campaign: 13V235000 (service brakes). The approximate failure mileage was 148,000.

- New Milford , CT, USA

I purchased this car in 2010 after the 2010 brake malfunction recall. I was told the recall software update had been performed to my car. Despite that recall, my car continues to have the following problem on a consistent basis. Whenever braking at slow speeds, if I go over a bump or pothole while braking, the brakes disengage, the car lurches forward, and I have to slam on the brakes to get the car to slow down/stop. My understanding is that this problem was supposed to have been fixed by the prior recall.

- Somerville, MA, USA

Braking power is not consistent. Car is hard to stop. Need to push the pedal really hard to stop at speed. This started to get worst after the recall.

- San Francisco, CA, USA