general problems of the 2011 Toyota Prius - part 2

Brake booster, pump failure.

I have a 2011 Toyota Prius with 85k miles, as I was driving on the highway the abs light, brake light, and tsv light came on and then brakes were not working like normal. Had to pump the brakes very rapidly and steer off to the right side of the highway and use the emergency brake to come to a complete stop. I called the Toyota dealer and they said its the brake accumulator fault and they will not cover the fix because it was out of the 10year/150k mile warranty per sb. Towed my car to an independent service center and they confirmed it was the brake accumulator c1391 code. Cost me $3000 to fix.

12 months ago we noticed a vibration while braking at very slow speed/creeping forward that worsened over time. We didn’t understand the significance at the time. In addition, we noticed more recently the brake pump running more and more frequently, even when the brakes weren’t being pressed. We suspect some sort of problem with the brake booster. This has had many claims against Toyota where my break booster is going out, and I have called Toyota to assist since they've had a class action lawsuit that caused them to assist with recalls on vehicles; however the year my vehicle does not qualify for a recall. They opened a service case# 241010002348, but told me it would have to be an out of pocket expense since there's nothing they can do. Unfortunately this is a failure defect on the manufacturers production. Please help.

The conditions listed in Toyota customer support program zjb for the brake booster and master cylinder occurred after the 10 year in service date on my vehicle. Brake, abs, and traction control warning lights turn on intermittently and when this happens brake response is poor and cruise control shuts off. When applying the brakes an audible tat tat tat sound can be heard from the front of the car that sounds like the abs being triggered. You should have Toyota recall impacted cars and fix the issue as outlined in the TSB and support campaign.

The contact owns a 2011 Toyota Prius. The contact stated while driving 40 mph, he heard an abnormal sound coming from the front-end of the vehicle, and the brake pedal required pumping to slow the vehicle. The abs and traction control warning lights were illuminated. The vehicle was taken to an independent mechanic, who determined that there was an accumulator pressure leak. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA action number: dp19004 (service brakes, hydraulic). The manufacturer was notified of the failure but referred the contact to the NHTSA hotline for assistance. The failure mileage was approximately 150,000.

I have been experiencing intermittent brake issues with this car now for the last 50k miles. Sometimes the warning lights on the dash will activate, sometimes not when I am experiencing issues. The power assist is the problem. - it activates and then deactivates without warning instantaneously, while applying brakes or not. Sometimes when I am applying the brakes without the brake assist working, it will instantaneously start working without warning, causing my car to almost lock up its brakes. This is very dangerous, especially in traffic. When I apply my brakes at any given time, I never know if I am going to have power assist or not. I have replaced the brake master cylinder once already with a mobile mechanic and the problem went away for about one year but now it is happening again so this seems to be a reoccurring issue with this car. I have decided to just stop driving the car and bought a different one. I am a delivery courier and I cannot be driving a vehicle unsafe as this. I have reported the issue to my local dealership, but they are refusing to troubleshoot without charging me and it’s telling me there are no recalls.

My brakes were making noise since month,now the abs light turn on.

The abs, anti-skid, and brake lights came on. Immediately, the brakes were less than full stopping power, and it was obvious it was not safe to drive the car any further. We had noticed that a pump was being activated when the brakes were being used, but no service codes were being displayed when checked. We later found out there was a recall on the brake booster and accumulator, but it was only a limited recall, no notice was sent to us, and no repair was authorized by Toyota unless the brakes completely failed. Once the dash warning lights came on, the c1391 service code appeared when checked, "abnormal leak of acc pressure". This issue is a safety matter because your brakes fail instantaneously at any moment while driving.

Brake booster and brake booster pump assembly are faulty and failing. Brakes are still functioning, but will ultimately fail without warning, from what I have read. This is highly dangerous for myself and other motorists. I was driving last week and tried coming to a stop at an intersection. I pushed the brake pedal and the car hesitated and then jumped/lurched forward before coming to a complete stop. The brake booster is sounding every 30 to 45 seconds to try and build back the pressure it is losing. Toyota offered a "customer support program" for these parts, as there's been numerous premature failures. Unfortunately, my vehicle no longer fits within the parameters of the support program (see attached). From what I've read though, Toyota has been negligent with replacing the brake booster under the support program. I have called Toyota corporate and they have offered no reprieve and won't stand behind this faulty part. Toyota needs to be forced to recall these 3rd gen Priuses and ordered to replace the breaking system. Expecting customers to shell out between $2-3k to have the ability to safely break/stop their vehicle is ridiculous, especially when Toyota is more than aware of this issue. I was quoted $2600 over the phone to remedy the issue from an independent hybrid shop. I've owned 7 Toyota's and two have been Priuses. This 2011 is by far one of their worst to roll off the assembly line with numerous reports of breaking problems, oil consumption issues, and head gasket failures. They need to stand behind their product(s), especially to brand loyal customers. Read more complaints about the breaking system: https://m. Carcomplaints. Com/Toyota/prius/2011/brakes/service_brakes. Shtml?fbclid=iwar1j7lj3haj3r1hy7lnmd4ervyxmlmhby_i98kpefgqyhyhft8gnyi1ptck.

Brake abs system dashboard lights warning system always always going off for the 9 years I've owned the car. Had the abs system replaced and still the dashboard lights going off and the system not functioning properly.

Traction control, abs and brake warning lights came on while driving. Car is now at the dealership for complete replacement of power pump and master cylinder assembly at a cost of $3,300. 00.

I’ve been told by our machanic that our Prius’ abs braking system is malfunctioning.

Dear mr; I own a 2011 Toyota Prius, and this week my brakes failed while driving down the highway. The abs and break lights and the esp warning light on the instrument panel come on. The brake pedal is hard and has an intermittent hum in the engine area. The scanner gave the code c1391 / acc press abnormal leak error. I want to file a formal claim against Toyota for the failure of my car's brake system and request repair/replacement of my car's brake system. --------------------------------------------------------------------------------------------------------------------------------------------- what component or system failed or malfunctioned, and is it available for inspection upon request? brak sistems / yes, is available for inspection. How was your safety or the safety of others put at risk? it was difficult to brake / the car was deviated when applying the brake / I left the road due to the risk of a collision by not having the active braking system. Has the problem been reproduced or confirmed by a dealer or independent service center? yes / independent service. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? no. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no.

The brake actuator on my 2011 Prius failed. Toyota issued an extended warranty of 10yrs/150k miles because they knew there was a problem with the product. I have less than 80k miles on my car and the actuator failed. I feel like I am being penalized because I don't drive my car as often. I contacted Toyota and was dismissed by them because I was outside of the 10yr window. The repair was $1737. 98 in parts and $780 in labor by a Toyota certified technician.

Brake actuator failed. Noise when applying brake but no code or dashlight. Looks like a common problem across Prius 2011 model cars.

All of a sudden, a few weeks ago, the abs, trac, brake, and brake warning lights all illuminated on my 2011 Toyota Prius, and the brakes became hard to press. Turns out, this is a known issue with this model of the Prius. Dtc c1391 stored in the ecu. There is a defect with the brake booster/brake booster pump, and Toyota issued a customer support program to extend the warranty on these two parts, but the program ended in 2021 and I am just now having this issue, although my Prius only has 115k miles. This should be a recall. I should not have to pay more than $3500 at the Toyota dealership to get this replaced when it is a defect with the parts that Toyota made (I should not have to pay anything). No dealership in the area wants to honor it either. Instead, they want to charge me $3500. And when I called Toyota corporate, they brushed it off and told me "the program expired a whole 2 years ago" without even trying to work with me on the cost of the repair or anything. Complete let down from Toyota.

Three lights appeared on the dashboard…code c1391. This has affected the braking system, and the traction control…and the brakes no longer regenerate the battery. The mechanic said “you must not drive this car” until a $2,700 repair is made. There was, apparently, a service bulletin sent out in 2019, and was then extended until 2022…which we did not receive, although we’ve been at the same address since we bought the car. But our car did not develop this common issue until now…2023, and Toyota says it was not a safety recall, so they don’t need to fix it, or help us get it fixed. We believe it is obviously a safety issue…. Since my brakes can go out at any moment.

On April 25, 2023 I started my Prius and as soon as I braked I knew something was not right. I noted that warning light were on. When I pushed on brake pedal, the resistance was very soft for about 2 inches of pedal travel. At that point the brakes grabbed very quickly. I drove to the Toyota dealership (huntington beach Toyota) and was informed later that day that the master and pump master cylinder needed to be replaced. The dealer said that Toyota did have a program to replace these assemblies, but had not issued a recall, which (in my opinion) it should have. I've had quite a few cars, most of which lasted for more than 200,000 miles. I've never had such a failure nor have I heard of one. Clearly there was a manufacturing defect that should have required a recall.

Brake actuator failed while driving down the road on Friday, 04/14/2023. The car became hard to slow down/brake. Brake light, traction control light, abs warning lamp came on, and tire pressure lamp came on. Next day lights went out. Then again all lights as above came on while driving down the highway. That was Wednesday 04/18/2033. Took to Toyota dealership who confirmed brake actuator had failed. Car has 133,000 miles on it. Prius was in the repair shop at norton Toyota of tulsa, ok, from Thursday 04/27/2023 until Saturday 04/29/2023.

On 4/12/2023, I was driving near an intersection and the e-brake and abs light both came on and the brakes on my car were suddenly twice as hard to apply, with a "soft" feeling to them. I was able to pull into a nearby brakes plus location. My younger sister and friend were in the car at the time. The problem has been reported by a Toyota dealership in California. The component was inspected by a repair associate at brakes plus and he confirmed that the electric brake booster on my Prius was shot. There were zero warning signs of the problem prior to the incident.

The contact owns a 2011 Toyota Prius. The contact stated while driving 50 mph, the check engine, service brakes, abs, and the traction control system warning lights were illuminated. The contact parked the vehicle on the side of the road for approximately 3 minutes before continuing to drive to her residence. The contact stated on March 17, 2023, while her husband was approaching a traffic light, the brake pedal was depressed but failed to stop the vehicle properly. The contact stated that several warning lights were illuminated. The driver stated that the vehicle cruised to a stop independently. The driver decided to drive at a slow speed to the residence. The contact took the vehicle to the local dealer, where it was diagnosed and determined that the brake master cylinder, the brake pump assembly, and the brake booster needed to be replaced. The vehicle was repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 159,000.

It is very unfortunate that the brake booster extended warranty was declined by tustin of Toyota specially after having my vehicle in their hands for another recall when the warranty was active. This is something I can not wrap my head around. I would like to speak to someone in regards to this dealer. Who can I speak with?.

Brake booster and brake booster pump failure.

Reporting an issue related to Toyota's customer support program bulletin (zjb): repair coverage for brake booster and brake booster pump assemblies on certain 2010 my Prius and certain 2010 my Prius phv vehicles. Finally got a c1391 error with the respective dash lights. Increased hissing/pumping was occuring from the brake assembly for about a year before hand until the code/lights happened. Customer support program bulletin is closed but hoping it reopens.

As I'm sure you have heard from the numerous complaints on the internet the abs on this vehicle is having issues. The repair is over 3,000 dollars. Toyota needs to recall this brake pump. I can't pay 3,000$ to stay safe in my vehicle. They made a defective part and were somehow allowed to extend the warranty instead of recall it. My vehicle is under the mileage but over the years so I was pretty much told too bad. This needs to be addressed at a actual road safety level which is why I am writing you. Thank you for your time.

I have reported this once and numerous times to Toyota. I even paid to "fix" the problem. My daughter was driving and all the dashboard lights came on and the brakes do not work. It's doing it again after they supposedly "fixed" it. My family is at risk! if anything happens, I will seek legal action. I can't believe a company as big as Toyota wont take responsibility. And that a recall wont be done. I've seen numerous people report the same issue. Please do something.

Abs warning light came on, followed soon by a beeping warning sound. Brakes felt odd. A few minutes later, complete loss of brakes.

Brakes in the car failed due to loss of hydraulic pressure/ brake acuator system. Toyota issued a service bulleton for this problem approx 2017-2021 and the dealer and corporate would not honor the repair to my vehicle each time I brought the car in for inspection after experiencing constant issues with my brakes. The brakes finally failed and I could not stop the car while driving at interstate speeds. The vehicle was inspected by a private mechanic and confirmed the failure that Toyota refused to honor. No warning lamps or messages in the car until the brakes actually went out while the car was in motion at interstate speeds. Symptoms first appeared in 2017, but the dealer insisted nothing was wrong even though I demonstrated the symptoms to their mechanics in person. I reported the dealerships behavior to corporate and they did not help. They claimed the brakes were ok because the car's computer did not give an error code "yet".

The abs actuator and booster failed with diagnostic error code c1391.

The contact owns a 2011 Toyota Prius. The contact stated that while driving at various speeds, the brakes would fail to operate as needed upon depression as several warning lights would appear on the instrument panel. The contact took the vehicle to an independent mechanic where the vehicle was diagnosed with a defective brake control dynamic system. The contact was referred to the dealer where they confirmed the failure and gave her an estimate for the repair. The manufacturer had yet to be notified about the failure. The vehicle had yet to be repaired. The failure mileage was approximately 155,000,.

The contact owns a 2011 Toyota Prius. The contact stated when his wife turned on the vehicle the brake, abs, and traction warning light illuminated on the instrument panel. The contact stated while she was driving at 10 mph, she noticed that the brake did not have pressure as usually. The vehicle was diagnosed at an autozone, and they stated that there was an abnormal acc (c1391). The manufacturer was contacted, and they stated that the vehicle was out of warranty. The failure mileage was 178,000.

Safety brake booster and actuator concern. The car abs, master cylinder brake lights are on. The booster is making hissing air sounds and the brake pedal vibrates. The code is 1309 maybe more. . This is a problem with thousands of Prius and costs thousands to repair. Toyota extended this warranty to 10 years 150k mine 2011 so lost the repair last year but only has 150k miles.

The contact owns a 2011 Toyota Prius. The contact stated that extra effort was needed to stop the vehicle due to the brake pedal being depressed to the floorboard. The contact stated that the traction control, abs, and brake warning lights would appear upon starting the vehicle. The contact had taken the vehicle to an independent mechanic where the vehicle was diagnosed with a defective abs actuator control unit and the contact was provided an estimate for the repair. Neither the dealer nor the manufacturer had been notified of the failure. The vehicle was not repaired. The failure mileage was approximately 133,000.

While driving at roughly 58mph, while going around a turn: multiple dashboard lights came on, tire pressure, traction control, emergency brake, one other. My brakes became less responsive (roughly half braking strength). This is consistent with the pseudo recall offered by Toyota covering my vehicle for a limited time, for which no notice was given and no warnings were sent. This issue has caused over five dozen crashes and during the duration of the recall, vehicles were not eligible until the braking system had failed. There were no signs of the faulty part until after the extended warranty period had expired, but the issue is the warrantied part, and the failure is consistent with the failure caused by the manufacturing defect responsible for the extended warranty effective in 2017.

Multiple brake warning lights came on at once. Took to dealership and was told brake booster pump had failed requiring replacement of parts totaling in over $3,000 in cost. Attached is a class action lawsuit about this exact issue, as well as a Toyota customer service bulletin acknowledging that they knew about the issue years ago.