Brake Master Cylinder Problems of Toyota Prius - part 2

Brakes failed while driving. Pedal went to the floor. Very little braking power left. Luckily I didn't have to stop suddenly and was able to bring the car to a stop slowly. Had the car towed to Toyota dealer where they diagnosed the problem as the brake booster / master cylinder. They told me there was air in the brake system. I received a quote for almost $2900 to fix the brakes. I called Toyota corporate office and asked for assistance with this catastrophic brake failure but was refused. Searching online found others with same failure. In particular, there was a person with 43k miles with exact same issue, and Toyota refused to help him. This is a very dangerous failure and should be a recall. Please investigate fully and feel free to contact me for any assistance. I am in the process of replacing the brake booster but I will keep the old one in case you need it for your investigation. I had similar issue on my 2004 Lexus rx330 and there was eventually a recall for it. It is unacceptable for a 3 year old car to have this kind of a safety failure. My wife and kids could have been seriously hurt or killed.

See all problems of the 2010 Toyota Prius 🔎.

On 01 may 2013, I was driving my two daughters home from school and the brakes on my 2010 Toyota Prius failed. The brake pedal became very stiff and the brakes did not respond. I began to panic because we were traveling down a steep hill. I continued to pump the brakes and suddenly, the pedal gave way and the car came to a screeching halt. I was luckily within walking distance of my house. I had my car towed to the dealership and they informed me that my brake booster and master cylinder needed replacement at a cost of $5500. I'm shocked. My car is 3 years old. After research, I discovered this is a common problem for the 2010 Prius. What I find most disturbing is this is clearly a manufacturer's defect, that is an extremely dangerous safety hazard. Prior to owning my Prius, I was a loyal Toyota buyer. I have had consistent acceleration issues with my brakes, even after the recall. If Toyota does not address this issue, I don't intend to purchase another Toyota product.

First incident: April 15, 2013 I lost my breaks while I was driving home from my night shift work as a registered nurse. I was at an intersection two blocks from my house when I felt the break was failing. It was a good thing that I was driving slow to make a turn when I felt the break system was not working. I was able to steer it to a parking lot nearby by using the foot break. Prior to this incident, I heard squeaking noises for about three days whenever I step on the breaks. I was relieved that I did not get into an accident. Action after the 1st incident: April 24, 2010. We towed the car to dch Toyota freehold, and it took about 5 days to repair the breaks so they gave us a loaner car which we truly appreciate. But when we picked up the car, the breaks were fixed but the squeaking noise is still present, and our windshield was cracked. We called the dealership right away to inform them about the squeaking noise and to complain about the cracked windshield. I was told by the service representative that their technicians tested my car and deemed it safe to drive and that they would never release my car unless they know it is safe to be on the road. Second incident: April 29, 2013, I lost the breaks again while I was on my way to work around 7:00 pm. I really got very scared because there was so much traffic at that time. I was able to stop and park my car slowly to the curb without hitting anybody else by using the foot break. Action after the second incident: same night, we towed the car back to the dealership for repair, and after a week of waiting, they finally came back to us specifying that the whole master cylinder and brake pad assembly is defective and needs to be replaced and will cost more than 4k for parts alone. Contacted Toyota about this issue, and they said that they will not assist us, since we exceeded the warranty period.

Experienced a complete brake failure while driving 2010 Prius. Dealer indicates brake booster failing and leaked nitrogen into master cylinder which should then also be replaced. Dealer insist it is one assembly and estimates replacement to be $5,166 ($1,638 for booster and $2,466 for master cylinder). Due to the complete warningless failure of brakes while in operation it would seem to a critical safety hazard due to the design flaw in the combined brake booster and master cylinder brake assembly causing a brake failure in operation.

The contact owns a 2010 Toyota Prius. The contact stated that the abs and anti-skid warning lamps illuminated while the contact was driving 40 mph. The brake pedal was depressed however, the brakes failed. The emergency brake was used to stop the vehicle. The vehicle was taken to the dealer and diagnosed as brake failure. The master cylinder and the brake booster assembly both were replaced. The manufacturer was made aware of the failure. The approximate failure mileage was 50,000.

All brakes failed while I was going 69mph on I-75 south just north of the union centre boulevard exit, approaching I-275 at the butler/hamilton county line on sat. Dec. 22. . All warning lights came on and the warning "beeps". I was in heavy traffic but was in the right lane and was able to exit on the union centre exit ramp and roll to a stop. This happened the day after I had the car at performance Toyota in fairfield, OH for the 35,000 mile check/oil change (on Dec. 21) . The car had to be towed to performance Toyota on Dec 22; they determined the master cylinder failed (lost its vacuum) causing total brake failure.

On Tuesday October 02, 2012 at approximately 0510 the vehicle brakes went out and the brake, abs, and stabilization lights came on along with alarm. Vehicle was towed to Toyota dealership for repair - told it was the master cylinder. Vehicle picked up on morning of October 4, 2012 from dealership drove approximately 20 miles and the exact same thing occured. Brakes, abs, stabilization alarms came on. Toyota delership was called and said that the vehicle should be fine - system had cleared with part replacement - "maybe it was a bad part or there could be air in the lines. " vehicle is presently at the delearship awaiting inspection. Fortunately, no accidents or injuries occured on these dates. However because of the loss of brakes and near accidents this vehicle is now a threat to my safety. So far I have been lucky - I do not want to take a chance with the third being the time that I am in a serious accident.

2010 Prius brake failure. I was able to slow down the car by repeated pumping on the brakes. Fortunately, managed to crawl to a nearby Toyota dealer by using the pumping technique and have my foot on the emergency foot brake just in case. Toyota said I need to replace the master cylinder with actuator. Total cost parts/labor $4100. I am upset because my family or others could have been seriously hurt if I panicked and not pumped on the brake to slow the vehicle down. This is a serious hazard which should be known as I have seen other similar complains lodge online.

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. Jb.

Brakes failed. 2010 Toyota Prius. 160,000 miles on vehicle. When I started the car, I had no brakes. When I put the car in gear, I then had brakes. I had brakes when I pulled up to a stop sign. As I waited for traffic I then had no brakes. When I began to move I had brakes, but then as I gained speed, the brakes went out. I managed to stop with the emergency brake. Checked the brake fluid: completely full. Dealer said the master cylinder went bad. Orginal brakes on vehicle; not even half used. Highway miles on vehicle. Very hot day. I believe it is electrical, dealer says mechanical. Had there been an accident, this incident would be looked into. As it is, no dealer will look into a car that is out of warrenty. I complained for 5 months about the brakes when I first bought the car new. Dealer told me that there is nothing wrong with the brakes. Even after the recalls, there still is problems with the brakes. Now I believe there is a problem with the master cylinder, -the electric component part of it- but Toyota will only look into it when there is a serious accident.

While backing out of my parking space at work, my brakes went to the floor and barely stopped the vehicle. Alarm was going off, so I pulled forward just enough to see if the brakes were working at all and they were probably 98% gone. I parked, got towed to dealer near my home with aaa. I later found out that a pair of abs skid control relays (2 88263-21010) caused the problem. Nothing mechanical failed. These relays caused my entire braking ability to be lost. I believe this is an unsafe design as there is no mechanical connection available at the pedal if you have this electrical problem. Some mechanical brakes should be available. The emergency brake is on / off only and no in between. I would like to find what legal remedies are available to me as I am considering changing to a safer vehicle due to this design flaw. As in power brakes, if you lose the power brakes, you can still stop the vehicle, though difficult since there is still a mechanical hydraulic system in place even with a failed power booster. The consumer also stated the master cylinder failed. Updated.

See all problems of the 2007 Toyota Prius 🔎.