Brake Master Cylinder Problems of Toyota Sequoia

Last month, while traveling home from summer vacation on flat ground, at approximately 60 mph, the vsc, trac lights came on in the dash. There was a terrible grinding noise from under the car and beeping inside the car. The car pulled hard to the right and decelerated abruptly in the middle of a busy highway. Thank goodness I was able to pull into the turn lane and limp into a gas station. This occurred three more times over the next 500 miles until I got home. I took it to the dealer, they replaced the yaw sensor. Only 3 days after that, it happened again. Took it to the dealer, they replaced two brake sensors and a master cylinder. Today, five days after that, it happened again. This time, thankfully at only 25 mph with no traffic. This is a very scary, dangerous problem that Toyota should not be ignoring. It has been recalled in the 2003 model, and should be in the 2002 model as well!.

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The vsc, trac off and break light all came on while I was picking speed from the stopping at the light. Previous to that, my husband has brought the car in to inquire about the break light coming on and off and Toyota stated there was nothing wrong with the car. Initially, I was told I could drive the car without any difficulties and once my car /account was pulled/viewed in the system then I was told to bring the car in immediately - within 30 minutes. Now I am being told that flush brake system - all, booster assy, cylinder sub assy, master cylinder seal,2 gaskets which is now costing me over $2,000. I have seen many complaints and recall on this same problem. Please advise. Thank you.

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Again, after picking the vehicle up from the Toyota service department in which the skid control ecu and brake booster assembly was replaced, the vehicle repeated all alarms and malfunctions as before: slippery lamp illuminated, alarm sounded, vsc trac and trac off lamp lit while abs brakes engaged while driving on a slight decline at 45 mph. I returned the vehicle to Toyota immediately! the technicians informed me on the following Monday that the seal for the master cylinder was cracked after replacing the brake booster assy. Surprisingly, it has happened again and I am taking it back to the service department tomorrow morning. There has to be a systemic problem as this problem is a known issue with this type of vehicle. It is disappointing that Toyota would keep these vehicles on the road with know problems of the such. Fortunately for me, there hasn't been any accidents. I fear for the safety myself and my coworker as we commute in the vehicle daily. More importantly, that of my wife and children when we drive the vehicle.

The contact owns a 2005 Toyota Sequoia. The contact stated that the track, abs, vsc, brake, and check engine warning lights illuminated on the instrument panel. The dealer replaced the master cylinder and the brake booster, but the warning lights continued to illuminate. The manufacturer was notified, but denied any assistance with repairs of the failure. The failure and current mileages were 83,000. The VIN was unavailable.

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The contact owns a 2005 Toyota Sequoia. The contact stated that the abs and traction control warning lights were illuminated. The contact took the vehicle to a dealer for diagnostic testing which located the failure at the skid control unit and master cylinder, which would both need replacing. The vehicle was not repaired. The failure mileage was 40,950.

The contact owns a 2004 Toyota Sequoia. The contact was driving at 5 mph and applying the brakes. The interlock brake system then independently engaged, making it difficult to stop the vehicle. The skid, abs and vsc warning lights were illuminated. The dealer replaced the brake booster, master cylinder, and the abs computer skid control at the contact's expense. The manufacturer did not provide any assistance ,yet advised if the components were ever under recall, he would possibly be reimbursed. The failure mileage was 94,996 and the current was unknown.

I purchased a new 2002 Toyota Sequoia in April of 2002. In January of 2004, I was on the new jersey turnpike and when I went to stop my vehicle, my brake pedal went all the way to the floor and I was luckily able to get into the shoulder and finally get the vehicle stopped without hitting anyone. It appeared to me that the master cylinder might have malfunctioned. The truck was towed to a Toyota dealer and they could not find anything wrong with the vehicle. When I picked up the vehicle, it appeared as though the brake pedal was back into its normal position but the dealer could not explain why. During the week of February 12, 2010 this same problem occurred twice and I was almost involved in two separate accidents. I took the truck to the Toyota dealer and once again the computer and other indicator lights were not showing any problems. After several hours of sitting there the brakes returned to their normal position just like before. I then took the mechanic for a ride in a back lot of the dealership and was able to make them fail once again. After this occurrence, the brakes never returned to their normal positions. I left the truck at the dealership for them to investigate. The mechanic said that there were no known problems in this area and he said after talking to several Toyota engineers that it could be a number of things: 1) master cylinder 2) brake booster 3) brake actuator 4) computer the mechanic and the engineers felt that is was probably the brake actuator so I went ahead with the repair. But they were not 100% sure that this was the problem. But they did agree that the vehicle was unsafe to drive. The brakes of course are working. I talked to several other mechanics and they have said that Toyota knows that these actuators are bad but are not doing anything about it. They also mentioned that the vsc/ecu computer modules are a defect as well.

The contact owns a 2002 Toyota Sequoia. The contact stated that the vehicle stability control and the traction control light remained illuminated. Also, the contact mentioned that while driving during inclement weather, the brakes made a loud grinding noise and did not engage in a timely manner. The vehicle was taken to the dealer. The technician diagnosed that the master cylinder needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 60,000.

When we first bought the vehicle the trac system lights kept coming on and the brakes felt mushy; we took it in to Toyota and they replaced the computer system which seemed to rectify the problem. Then about 9 mo to a year later the lights kept coming on again and the brakes failed twice, Toyota stated they would replace the brake system fluid and the master cylinder at our cost because we had taken it elsewhere and they felt that it had contaminated brake fluid, which our mechanic stated in writing was not. Although we tried numerous times to have Toyota fix it under warranty; we got the vehicle repaired through our own mechanic and then shortly later the brakes failed resulting in a crash on the freeway. When it was decided that the seq would be repaired via ins there was a code that showed up on the computer system that showed that brakes indeed did fail; however when taking it to Toyota the same code did not show up. The vehicle did well, however we live by a dirt road and when traveling down the road or going around a corner quickly the trac system lights go on and now the vehicle acts like it won't go when the trac system is on and you slow down or start up again--at present the system is turned off; it has really never worked correctly.

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