Serious brake issues! failure of brake booster and master cylinder causing impaired braking lending to safety issues. Many insiders at Toyota know the 2010 Prius brake issues exist and question why it is not handled at the corporate level. Brakes are spongy and additional pressure must be applied. The ABS is inoperable because of the problem. Please hold Toyota accountable for this chronic issue. The safety of all involved is affected due to inconsistent braking. My dealership asked corporate Toyota to address and they refused.

- Deland, FL, USA

Brake booster failure.

- Deland, FL, USA

The brakes seem to disengage for a second at random times while pressing on them in a normal manor. I drive every day abut 20 miles and this seems to happen about once a month. I didn't think much of it until a few days ago when I had to slam on my breaks to try and avoid an accident. During that incident they disengaged for a second again. This was a second too long and I was unable to avoid a collision. I looked this up after my accident and I surprisingly saw similar reports on google for my car. But it looks like Toyota is saying that it doesn't affect my VIN number? I'm here to say that it does.

- La Mesa, CA, USA

I drive a Toyota Prius 2010, I was driving when my brake, ABS, and traction control light came on at once. When I tried to apply the brake it would take a lot of force for my car to stop. I went to the Toyota dealership to get it checked out and they said part number C1391 has to be replaced. Tech found abnormal leak in accumulator. The accumulator pump assembly needs to be replaced. Which would cost me 2,000 dollars parts and labor. They also told me they might find out that the master cylinder might have to be replaced as well if damaged. Which would be 3,300 dollars. So worst case scenario it would be over 5,000 with tax to fix my car. I noticed other 2010 Prius models were recalled for the exact issue but only certain VIN numbers. My VIN number wasn't included. I feel like it should be if many other people are complaining about the same issue with this car. I can't afford over 2,000 in repairs let alone 5,000.

- Largo, FL, USA

Brake slipping when over the manhole and lost control even not wet surface. I intentionally drove over same spot 4 times on 8/20/2017 and exactly same conditions happen.

- Plymouth, MI, USA

The contact owns a 2010 Toyota Prius. The contact stated that while driving at approximately 45 mph, the brakes operated independently while the contact was depressing the accelerator pedal. The vehicle was taken to jack taylor Toyota on 3750 jefferson davis hwy, alexandria, va 22305 where the diagnosis was undetermined. The contact mentioned the pre collision system was deactivated however, the failure persisted. The manufacturer was notified of the failure. The approximate failure mileage was 95,250.

- Chantilly, VA, USA

Traveling straight forward at 40 mph and approaching a red light. Immediately upon depressing the brake pedal, an alarm sounded and the ABS, brake, and traction control warning lamps lit up on the dashboard, and my Prius completely failed to brake, continuing unabated toward the other vehicles stopped at the red light. I began pumping the brakes and was able to build up pressure and safely stop without collision or further incident. My local Toyota dealer diagnosed the problem as a "brake accumulator internal leak. Recommend replace brake accumulator". this needs to be recalled, this is egregiously irresponsible by Toyota, I easily could have been hurt or killed.

- West Palm Beach, FL, USA

I was driving on the freeway. All of a sudden brake, ABS and suction traction light turned on. After that I have to push my brake harder to slow down the vehicle. I was able to drive it back home safely. I took it to the dealer who said I need to replace brake master cylinder with brake booster. Doing research I found many owners of the same model car have same problem and some of the cars are recalled but not all. I believe most of 2010 Toyota Prius car have issues with brake system which is bad for our safety. It can cause serious harm for our safety. I request your good department to investigate the braking issues for 2010 Toyota Prius vehicle. As a good citizen of the country, I felt I need to discuss this issue with you.

- Reynoldsburg, OH, USA

ABS brake light stays on all time.rear wheel gets extremely hot,

- Chini Hills, CA, USA

ABS and break light lit while going 55 mph. Lost antilock break feature. Local port St lucie tire and break diagnosed bad master cylinder and nitrogen leak into break lines. Found recall on similar 2010 Prius' due to nitrogen leakage into break lines

- Palm City, FL, USA

All brake lights come on (brake, ABS and traction control) and power assist breaking stops working and brakes feel very weak. Brake actuator runs frequently when lights are not on. There are many complaints online and Toyota claimed they fixed this issue in 2009 and extended the warranty for 2009 and earlier, but the problem is clearly not fixed.

- Phoenix, AZ, USA

The contact owns a 2010 Toyota Prius. While the contact's wife was driving 35 mph, the ABS, traction control, and brake warning indicators illuminated. The driver had to apply extra pressure to the brake pedal to slow down the vehicle. The vehicle was taken to an independent mechanic who diagnosed that the brake booster and master cylinder failed and needed to be replaced. The vehicle was repaired. The dealer was not contacted. The manufacturer was made aware of the failure and stated that the vehicle was not within the VIN range. The approximate failure mileage was 95,000.

- Kaneohe, HI, USA

ABS light came on. Diag code: C1391. Abnormal leak in accumulator. This problem is similar to a recall on Prius 2010 for ABS brake issue. However, Toyota said that my Prius is not part of the recall. I would like to request Toyota to fix this problem for my Prius 2010 so that I can safely drive this car.

- Gainesville, FL, USA

I change the brake booster twice and hace the same problem. My brake pedal loss of braking ability or slipping brakes and the warning brake, ABS and traction light permanently on, and no cruise control works at all

- Accokeek, MD, USA

Brakes turned to mush - pedal went all the way to the floor with almost zero stopping power. Sounds like a similar recall from 2013 or so. Going 45 mph (speed limit) on a busy 4 lane hghway approaching stoplight and slowing traffic for red light at intersection of another 4 lane road. Brakes mostly unresponsive. Almost went through intersection and narrowly missed hitting a slowing car. Braking did not engage per usual activation position and pedal went to the floor instead. Car was just serviced a week ago for unrelated recall item. Car has been maintained diligently since new purchase in 2009, getting all recalls serviced promptly. Maybe the range of vins in the older recall was not wide enough?

- Arlington Heights, IL, USA

When driving over bumpy or rough surfaces or pot holes, while applying the brakes, the brakes often seem to stop working. And the car seems to have a little boost forward. It happens wherever the road surface has bumpy areas on straightaways or curves. And mostly when applying light pressure to the break, like slowing for an upcoming turn. It has been happening since I got the car in 2013. I have taken it to a mechanic, but they couldn't find the problem. This has happened many times over last 3 1/2 years.

- Cincinnati, OH, USA

I am the original owner of a 2010 Prius. Within the first month, I contacted Toyota, complaining of the brakes, which were not consistently smooth. In general, the brakes work fine, but if I hit a bump or ditch, the brakes suddenly stop working for a split second, and the car feels like it is lurching forward, before the brakes suddenly start working again. Toyota service was never able to "reproduce" the problem, and eventually I gave up. A couple years ago, the car was recalled for this problem, and I brought the car in to be fixed. Unfortunately, the recall work has not remedied the problem. The brakes still seem to occasionally malfunction when the car drives over a rough patch. Toyota seems to believe the problem has been solved, but it has not be solved. There is no difference since the recall.

- San Diego, CA, USA

This afternoon, my wife was driving down a two lane, paved street at about 25 mph. The street has a slight decline and she began to apply the breaks to slow down slightly. Just a second or two later, she hit a small bump in the road and the car accelerated (while she had her foot on the break) for a fraction of a second. We didn't hear the sound of the engine revving. Thankfully, there were no other cars on the road at this time and there was time to press the break again. Based on looking around online, many people have reported similar issues (www.consumerreports.org/cro/news/2010/02/Toyota-adds-2010-Prius-braking-problem-to-the-list-recall-possible/index.htm).

- Richmond, VA, USA

When I am coming to a stop (braking normally) and hit a bump, the car surges slightly and the brakes become less responsive. It feels like I'm fighting the engine as it accelerates and I'm trying to brake against it. Releasing the brake and attempting again seems to be a solution, but I often don't have time before reaching the intersection I'm approaching. This consistently happens in two places in my daily commute with a slight buckle in the road approaching an intersection on city streets and county roads.

- Edmond, OK, USA

Driving down highway at posted speed limit (75mph), I tried to slow down due to traffic and noticed my cars ability to brake was severely compromised. I then noticed my cars brakes, ABS, master warning and vsc lights had came on. Given that my car has 103K miles on it, I figured it is time for a brake pad service. With the limited braking ability, I decided to make the short drive to the Toyota dealer for brake service. After the dealer inspected my car, a representative told me that it is not the brake pads that are causing the lights in your dash to go on but rather the brake booster. They advised me that it is not recommended that I drive the car anymore until the issue is remedied by replacing the brake booster at a cost of over 2K. I had to also incur the cost of a rental since the booster was not in stock and would take over the weekend to receive. I was taken aback by the total cost of the service but had no choice and proceed to get it repaired. Upon receiving my car a few days later, I drove to work and upon my return home, the issue repeated itself with all the lights on the dash lighting up and the cars braking ability was again compromised. Extremely irate, I drove directly to the dealer and upon inspecting the car they told me that it is now the accumulator that needs to be replaced. This time the dealer absorbed the cost of over 3K to replace it. I researched the internet for any known recalls and found the issue was being addressed by Toyota with a recall however my cars VIN was not part of it. It is my hopes that you make Toyota aware of the safety issue and initiate a recall on all 2010 Prius models and not just some. I would also like to get the cost I incurred with this safety issue reimbursed at some point.

- Laredo, TX, USA