Brake Electric Antilock Problems of Toyota Prius

Tl the contact owns a 2008 Toyota Prius. While driving 20 mph, the brake, anti-lock braking system, vehicle stability control, and traction control warning indicators illuminated on the instrument panel. Additionally, there was a triangle symbol flashing. The vehicle was taken to autonation Toyota leesburg (1 cardinal park dr se, leesburg, va 20175, 571-357-3965) where it was diagnosed that the anti-lock brake system actuator needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and provided case number: 1809122780. The manufacturer stated that the vehicle was not covered under a warranty. The failure mileage was 206,970.

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2009 Toyota Prius. Consumer write regards to vehicle brake problems. Consumer also sent revised Toyota document. The consumer stated the same braking problem existed for models before and after the 2010 models. However, only the 2010 models were recalled.

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2010 Toyota Prius. Consumer states when one of the front tires travels over uneven payment specifically an indentation in the road the braking action fails momentarily the consumer stated the vehicle lunged forward a few feet, before the brakes engaged again. The dealer informed the consumer the issue had to do with the abs/trac system.

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2008 Toyota Prius. Consumer states two problems with vehicle, the abs release momentarily causes a brief surge forward any time there is a small bump in the road when braking and consumer also states he nearly rear ended another vehicle at a stop light when he almost couldn't stop, even by putting his entire weight on the vehicle. The consumer also believed the pedals were designed too close together.

The contact owns a 2004 Toyota Prius. While driving approximately 55 mph the vehicle accelerated on its own. The vehicle crashed into a concrete divider on the highway. The contact stated that the air bags did not deploy. The contact was able to drive the vehicle after the crash. The driver and the passengers sustained injuries to their back and neck and were under going therapy for their injuries. There was no police report filed. The contact stated that the crash caused damage to the front bumper and the front passenger side door which would not open. The manufacturer stated that an inspector would inspect the vehicle. The inspector stated that there was a problem with the abs brakes. The contact received the report from the manufacturer and they did not indicate that there was a safety failure and were unable to provide further assistance. The body damage was repaired. The contact stated that she did not feel safe driving the vehicle after the failure. The approximate failure mileage was 120,000.

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The contact owns a 2010 Toyota Prius. The contact was driving approximately 5 mph when the anti-lock brakes engaged independently and caused the vehicle to come to a sudden halt. The vehicle was inspected by the dealer who was unable to diagnose or duplicate the failure. The vehicle was not repaired. The failure mileage was approximately 100.

2010 Toyota Prius. Consumer states vehicle did not seem to stop immediately when he hit a bump.

Anti lock brakes take a second or two to grab when traveling on bumpy, uneven, bad road surfaces. This has occurred since day one that I received the car and I have allowed extra space to stop because of it. I did ask my dealership 2 years ago about this problem and they could find nothing wrong with the brakes. The most recent incident happened on 4/29/2010 and I slid through a red light. Thank god no one was ahead of me.

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2010 Toyota Prius. The consumer stated he experienced two safety issues; loss of brake effectiveness and engine race when the consumer applied the brakes when going over bumps/rough roads, or in marginal conditions due to snow/ice when approaching a stop sign, he would lose braking effectiveness. The consumer took the vehicle to the dealer for a recall repair on March 24, 2010. However, he continued to experience loss of brake effectiveness. The consumer pulled into a neighbor's driveway after driving less than one mile from his home. After pushing the park button, but before pushing the power button, the engine began to race. It was not at an extreme high rpm and it was not for an extended period time, but it did last for several seconds. After the vehicle went down to normal rpm, after a s second or two, it began all over again. The consumer stated it was not a surge as the vehicle was not in gear at the time.

2010 Toyota Prius. Vehicle repair was covered under a recall, but after a no brake incident consumer questions the repair. The consumer stated the recall was performed on April 3, 2010. However, on April 6, 2010 he hit a slight bump as he applied the brakes and had a momentary feeling of having no brakes. The vehicle did stop. However, the instance did lead the consumer to question the adequacy of the fix.

The contact owns a 2004 Toyota Prius hybrid. While driving approximately 60 mph, the check engine warning light, and an unknown warning light illuminated on the instrument panel. The dealer was notified and advised the vehicle was safe to drive; unless the temperature, brake or oil warning lights illuminated. The vehicle began to lose power and the anti-lock brake system warning light illuminated. The vehicle was maneuvered to the side of the highway. The vehicle was towed to the dealer. The failures were related to the inverter water pump and the skid control electronic control unit (ecu). The inverter water pump was replaced. The failure occurred a second time. The vehicle was repaired for the malfunction. The failure and current mileages were 61,000.

The contact owns a 2010 Toyota Prius. While driving approximately 45 mph and applying the brake pedal, the vehicle would not respond. She felt the vehicle accelerating while attempting to brake. On one occasion, while depressing the brake pedal on a hill, the vehicle accelerated down the hill. This occurred on several occasions. The dealer was contacted and advised bringing the vehicle in for a diagnostic test. No repairs were made to date. The current and failure mileages were under 67,000. Updated 04/01/10 the consumer stated when she applied the brake, it didn't engage and the vehicle momentarily surged forward before the brake finally engaged. Updated 07/06/10.

The contact owns a 2005 Toyota Prius. He was driving 30 mph on a rainy day when he started to apply the brakes and the vehicle surged. The dealer test drove the vehicle and stated that the abs needed to be replaced. No repairs were made to the vehicle. The failure mileage was 107415. The current mileage was unknown. Updated 4/5/10 updated 07/01/10.

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2009 Toyota Prius. Consumer states problem with braking system the consumer stated when he applied the brakes to stop, he realized they did not engage and neither did the abs. The vehicle continued at the same slow speed finally coming to stop only after a truck sheared off the front license plate on the consumers vehicle. There was no other damage to the vehicle.

The contact owns a 2010 Toyota Prius. The consumer stated as he began to slow down and applied the brakes. The vehicle traversed a portion of the roadway that had some potholes on it and the brakes released for what seemed a second. The consumer was doing about 30 mph and pressed the brake pedal more firmly. It seemed as the vehicle was attempting to use abs in a condition that it deemed was an uneven roadway/icy road conditions. However, the condition at the time was bare and dry. The consumer believed that the vehicle would operate as expected in dry smooth roadway conditions, but when the road surface was bumpy or slick, the abs system would act as if the vehicle were going to slide. The dealer performed the software update to alleviate the problem. Failure mileage was 4,500. *updated 03/01/10 updated 05/10/jb.

The contact owns a 2009 Toyota Prius. The contact stated while driving at 45 mph he had to brake hard and fast. The vehicle slowed down but crashed into a truck. The contact stated the vehicle was totaled. Updated 04/28/10. The consumer stated he never felt the abs activate. Updated 02/24/10. Updated 3/8/10 the consumer stated he did not hear the anti-lock system sound or feel the usual brake pedal vibration. The vehicle slowed initially, then deceleration began with no lock up of tires and no apparent anti-lock system engagement. The accident was due to the vehicles failure to stop as expected. Updated 05/11/10.

I had a 2007 Toyota Prius that seemed to have issues whenever I would hit the brakes on slick\wet roads or sometimes when I would hit a bump. It felt as if the brakes would not apply and the car would feel like it accelerated forward instead of stopping. Usually the brakes would kick in after a second or two of this kind of slipping. However, in early November of this year while taking my son to karate on a wet day we hit a spot of repaired road that caused this to occur again, instead of correcting itself it felt like I had no control of the car and the car veered off to the side of the road, went up an incline and flipped the car onto its side. Fortunately in this case no one was injured at all as I was going fairly slow and the car quickly came to a stop when it went on it side. I always thought the issue was with the anti-lock brake system but I recently saw an article about 2010 Prius having this issue and I thought I should report that this happened to me on an older version of the Prius as well.

The contact owns a 2010 Toyota Prius. The contact was driving approximately 4 mph when the brakes were applied, the anti-lock brake system warning light illuminated on the instrument panel and the brakes began to lock. The vehicle was taken to an authorized dealer. The technician confirmed that the brakes were not operating properly after test driving the vehicle. The vehicle remained at the dealer for further inspection. The contact was provided a loaner vehicle. The technician stated that after the final inspection the brakes were operating normally. The failure mileage was 30. The current mileage was 5,500.

The contact owns a 2010 Toyota Prius. The consumer stated the problem has occurred a total of 4 to 5 times. The dealer was contacted and they stated that they never heard of this problem and if it occurred again to give Toyota a call. There have been no repairs done to the vehicle. The failure mileage was 2000 and current mileage was 8200. Updated 3/17/10 the consumer stated when he approached a stop light at the top of the ext ramp, at less than 35 mph, he encountered a bumpy surface in the road and the brakes seemed to suddenly release and the vehicle rolled ahead. The brakes seemed to re-engage moments later, preventing the vehicle from hitting in car ahead. It was a moderate stop on dry pavement with consistent pressure on the brake pedal. Updated 05/20/10.

2010 Toyota Prius. Consumer states rear brakes released or slipped and vehicle sped up. The consumer stated within the first month of driving, she drove over an uneven, perhaps potholed area in the road and it seemed as if the vehicle's rear brakes released or slipped, and the vehicle sped up. The vehicle then seemed to correct itself and drove smoothly ahead with proper braking.

The contact owns a 2009 Toyota Prius. The contact was driving approximately 20 mph. Whenever encountering a bump or pothole in the road the vehicle began to operate uncontrollably with an illumination of the warning light indicator. Also, the failure occurred while making a sharp turn. The vehicle was taken to a dealer regarding the failure. The contact stated that the malfunction could cause a potential crash. The failure mileage was 20,000. Updated 3/8/10 the consumer stated the yellow brake system warning light illuminated and the vehicle lost traction momentarily. Updated 05/11/10.

I am experiencing a problem with my '07 Toyota Prius. I purchased my Prius in may of '07 & have approximately 17,600 miles on the odometer. Since then I have experienced on approximately 6 occasions a lurching when braking to a full stop at a stop light. I am braking after a slow coast and gradually braking so it is not a sudden action. Since it happens so rarely and with no warning and doesn't repeat the problem for months I have not taken my car in to the dealership. After hearing similar complaints 2010 Prius I called my dealership to see if they could check my car for the same defect. The dealership said it would be difficult to diagnose unless the car would just happen to experience the behavior during a test drive. But for $79 I could bring it in which would document my complaint. I was also told that since the 2010 recall the dealership was being inundated with hypochondriac owner's reporting imagined problems. I think those owner's are more likely to be like me. Just now reporting a hard to replicate incident. I think the investigation needs to be broadened immediately for all Prius involved in the floor mat recall as I think that is just an invented problem to cover up the braking/acceleration defect. Updated 04/15/10.

Toyota Prius traction control system-if you are going up a hill and you loose traction due to snow and the car stops. You cannot ever go forward,if the tires attempt to spin at any level og gas/electric the rpm goes to zero. The only way to move the car is to back down the hill. Need I say more. The dealer agrees and stated Toyota never gave us a fix. We have this problem for years. I have talked to other Prius owners and they all say the same ,you have to use your other car. Which I do. However my wife used the car last week and we had some minor snow and she was on a hill(going up) for 2 hrs before she was able to back down when morning traffic subsided. This is a 2004 Prius. This can be a dangerous situation for a person that is uncomfortable in backing down a hill.

The contact owns a 2007 Toyota Prius. The contact stated that his complaint pertains to the anti-lock braking system on all vehicles. He stated that when driving on a road that is wet, icy, or contains snow, he has to slam on the brakes and depress the brake pedal to the floor in order to stop the vehicle. He stated that the tires lock up one by one, which takes all control of stopping the vehicle out of his hands, as opposed to pumping the brakes and maintaining some control over the vehicle. When the abs is activated, the vehicle shakes, bucks, wiggles, jerks, and makes a lot of noise. The contact did not want to provide any vehicle information other than the year, make, model, and mileage information. The current mileage is 4,000 and failure mileage was 3,000.

- the contact called regarding the 2004 Toyota Prius. The contact stated he was traveling up a hill at 10-15 mph with icy road conditions and the anti-skid control engaged and all four wheels on the vehicle locked. The contact pressed the gas pedal. However, the vehicle would not move. The vehicle did not lose power. The contact stated he had to back the vehicle up in order for the wheels to eventually go forward. The contact called the dealer, tested a Prius and had the same type failure. The dealer stated that was the normal operation of the vehicle. The failure mileage was 49,000. Updated 03/19/07.

Every time our 2005 Prius is operated in rain snow slush the rear brakes are so grabby that it makes the car unstable. On dry days brakes are fine when you start out on wet days the antilock brakes act normal as time goes on they get more and more grabby to where it is unsafe.

I turned left into driveway of a home- driveway has an incline. I turned off power and two children exited car. One passenger returned within five min and sat in front. I placed foot on brake. Brake felt "locked" with no give. I pressed power button with foot on brake, and placed gear in reverse. I let foot off brake to roll slowly out of driveway. When I attempted to brake to slow exit, my foot went all the way to floor--no power. I notice gear was neutral. Power would not turn off. Car was rolling closer toward a busy four lane street. I noticed the power button light color was red, and the following yellow warning indicators were lit: brake system warning light, malfunction indicator lamp, anti-lock brake system warning light, slip indicator light. I depressed the emergency brake to stop. I told my 14 y/o passenger to exit the car and when she did the master warning light came on while the above lights remained lit. The brake continued to depress to the floor. I again attempted to turn off the power without success. I exited the vehicle with my Smart entry key in hand and as expected loud buzzing noise came on. I then contacted Toyota roadside assistance. The reference number is 269-568-6678. I called back later to change the reference number to 269-492-2066. I had asked for police assistance for traffic control, but the police did not show. On 9/6 a. M. , jim at metro Toyota service, kalamazoo, mi called & I described the above to him. At 1530 on 9/6/06, I described my experience to marvin at Toyota customer relation. The case number he provided was 200609051137. This is the second like incident with this vehicle. I did not report the first incident to the NHTSA which occurred a few months after I took possession of the then new 2004 Toyota Prius. No reason was found for the first incident, by the same dealership service. The consumer stated the vehicle accelerated on its own. Also, when the consumer applied the brakes, the pedal became soft and went down to the floor. Updated.

The contact stated while stopping the brakes released. The parking brake was used to stop the vehicle. The vehicle was taken to the dealership, but they could not duplicate the problem. There have been no repairs made at this time.

When trying to stop abruptly consumer brakes did not respond.

2005 Toyota Prius. Consumer states brake problems the consumer stated within a month of purchasing the vehicle, she noticed the brakes would engage, then fail, then engage again. The vehicle was taken to the service department, but they were unable to duplicate the problem.

2002 Toyota Prius braking problem the consumer stated he didn't see the issue as a braking problem; rather a control conflict. Whenever the problem occurred, the vehicle was moving down a slight grade on a road surface having its share of paving patches, frost heaves, etc. The slight downgrade causes the vehicles speed to increase, or perhaps an intersection appeared ahead and for whatever reason the brakes were gently applied in order to slow the vehicle down. When the problem occurred, the symptom was a brief interval and the vehicle seemed to accelerate and then normal braking resumed and the vehicle slowed down. Just prior to the brake activation, the vehicle is in regeneration mode, in which the electric propulsion motors are acting as generators, where energy motion is being extracted and converted to electrical energy to be stored in the vehicles battery. Whenever the brake pedal is activated, the first thing that happens is that the motor now become generators are forced by the control system to convert significant energy of motion into electrical energy. The consumer believed that the normal braking system shuts down. The consumer believed the problem was with the abs.

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2008 Toyota Prius. Consumer states brake problems with the vehicle. On several occasions, prior to public notice and the recently announced recall, the consumer noticed an unusual braking incident. The incidents happened while slowing down to make a turn. When she applied the brake, the engine raced for a split second and the vehicle surged for a moment.