Brake Drum Wheel Cylinder problems of the 2010 Toyota Prius

I was just told that my 2010 Prius needs the brake boost assembly (cylinder and boost) at a cost of $2,570. It was causing my 4 month old, 12v battery to drain. I thought that was outrageous so I looked into it and found out there was an "enhanced extended" warranty issued (not a recall) , but for my vehicle it expired April 2020. Another issue that I uncovered that this part also causes the Prius to lurch forward when braking and you happen to drive over a bump. Train tracks, or potholes which is a safety issue. I have also experienced this with my Prius. Fortunately, I have had no accidents so far. I have read that there have been accidents caused by this issue. Toyota should step up and fix the problem before people are injured due to this defective braking system. My daughter drives a 2015 Prius. Is anything more being done? or are they going to wait until more accidents happen? I stumbled across this issue when my 2010 Toyota Prius 12v battery required frequent jump starts. I replaced the battery ($300) Dec 2020. Prior to that, I called aaa and got a jump start. Because of covid, I wasn't driving the vehicle daily (work from home) so it was assumed the cause was the vehicle should be driven frequently.

I was comfortably driving my 2010 Toyota Prius down a city street on a Thursday afternoon--about 25 mph, light traffic--when suddenly--without any trigger or warning--I lightly pressed down the brake pedal to slow down for a speed bump, and the brakes shuddered, the brake pedal seemed to twitch, and the car started making a loud shrieking and grinding noise every 3-5 seconds. For the record, my 2010 Toyota Prius has been regularly serviced at my local Toyota dealership since I purchased it in 2018. The loud shrieking felt like it was coming from below my feet and from the drive shaft. I pulled over--the shrieking and grinding continued. I stopped the car--the shrieking and grinding continued. I got out of the car--the shrieking and grinding slowed after a few minutes. When I turned the car on again, the shrieking and grinding started and the car was beeping in a way I'd never heard before. Fortunately, I was about 4 blocks from my local Toyota dealership. I asked them if I was safe to drive the four blocks or if I should get the car towed, and they said I should be safe to drive. I drove to the dealership with the car shrieking and beeping. The brakes felt squishy and unreliable, but the dealership has said I should be fine. I dropped off the car. The next day, I got a call from the dealership saying that my brake booster pump and brake cylinder assembly had totally failed. When I asked the technician if there was something I could have done to prevent this, he said, �no, this is just something that happens to these cars. � the brake failure occurred on Thursday, August 27, 2020. The phone call from the dealership occurred on Friday, August 28, 2020.

The brakes went completely out on the vehicle while driving on the highway. I had no ability at all other than the emergency brake. The dealer said that the cause was the brake booster and master brake cylinder.

Noticed brakes pulsing at very slow speeds. Looked up symptoms online and determined it was from brake booster leak issue. Took to dealership but because no codes showed up on diagnostic machine, was told nothing wrong. (that was at 147,000 miles. ) fast forward 6 months and warning lights came on while driving and braking became very spongy. Took back to dealership and needs brake booster pump and brake cylinder assembly replaced. Now has 155,000 miles and is 5000 miles past warranty. Long story short is that I was able to determine an issue long before their computer could detect anything. But because I'm now past warranty, I have to pay $2600 for repair.

My brakes recently stopped working as they normally do (you had to press extremely hard on the pedal to get it to stop) and several lights came on the dashboard. Prior to this the car was making a very strange noise when you start to push on the brakes. Not like a typical squeaky brake sound. I took it to Toyota and they gave me a quote for $3,700 stating that I needed a new brake cylinder assembly. I discovered a recall for 2010 Prius for the exact diagnostic code and they said my Prius was not covered by the recall. When you "reboot" the computer on the Prius, the lights and brake problem go away. This appears to be a significant problem with the 2010 Prius from what I have read on-line and Toyota is not acknowledging it. It's also a very costly repair that seems to be easily fixed when you reboot the computer on the car. What is going on? how many people are paying Toyota for this fix that appears to be a wide problem with the vehicle that should not be happening?.

The brake system abs not works. The car was in motion on the street when the system abs stopped working and the warning lights in dashboard. The brake pedal is lowered unexpectedly and the car continues non-stop until the pedal is repeatedly depressed again. Diagnostic in dealer Toyota , kendall Toyota (10943 south dixie highway miami, florida 33156), system abs/vsc/trac not working, (code c1391: abnormal leak in accumulator). Date September 20 the 2017. Warning: as nitrogen is released into the brake fluid, the brake pedal may have reduced hydraulic pressure. Under certain circumstances, this condition could affect stopping distance and increase the risk of a crash. Dealer cost repair , change new cylinder assy b (part n� 47080-47140), pump assy, brake (part n� 47070-47060) and 6. 5 hrs. Labor; $ 4,429. 65. - recall subject: service brakes report receipt date: 06-05-2013 NHTSA campaign: 13v235000 manufacture: Toyota motor engineering & manufacturing summary: Toyota is recalling certain model year 2010 Prius vehicles manufactured March 31, 2009, through October 9, 2009; and model year 2010 Lexus hs250h vehicles manufactured June 19, 2009, through October 9, 2009. Nitrogen gas from a component of the brake booster pump assembly could leak into the brake fluid. Consequence: as nitrogen is released into the brake fluid, the brake pedal may have reduced hydraulic pressure. Under certain circumstances, this condition could affect stopping distance and increase the risk of a crash. Remedy: Toyota will notify owners, and dealers will replace the affected brake booster pump assemblies. The recall began on August 7, 2013. Owners may contact Toyota at 1-800-331-4331.

Complete brake failure when stopping for stoplight on hwy 53/midway road. Resulting in 3 car accident. This was the second brake failure. The first complete brake failure happened when backing out of parking space at work location. Brakes were pressed , car kept backing up hitting a parked car behind us. After the first failure the local Toyota dealership drove the car and also experienced total brake loss after driving it for a bit. The Toyota dealership replace the brake cylinder assembly.

Master brake cylinder and booster, $4700 repair.

I would like to file this claim as the same incident described below happen two times in less than two years. This is a big safety issue which could have been fatal. -- first event occurred on 8/17/2012 (odometer 55899). Break totally failed on a freeway and almost lost my life that day. Towed to the dealer and they replaced 1) break cylinder assembly pn#47050-47060, 2)gasket, break boost pn#44785-02060 & 3) break fluid. When asked to the dealer what the reason for the failure was, we were told that they do not know the cause and failed part was sent to the manufacturer for investigation. We requested to tell us the findings from the manufacturer but never heard back and soon after this incident Toyota had a recall for breaks. -- the second incident occurred on 7/16/2014 (odometer 91965) and same break failure occurred again as described above. This time dealer replaced 1) break cylinder assembly pn#47050-47140, 2) gasket, break boost pn#44785-02060 & 3) break fluid. Please note that the second time the break cylinder assembly pn# is different. We asked the dealer again what was the reason for failure of the same part again but did not get a clear answer from them. We wrote several emails to the dealer but no response yet as of today (8/19/14). I am a very unhappy customer. What will Toyota do if this happens again? soon our warranty will expire and if this happens again which is a Toyota's existing problem, how it will be covered? -- hope to hear soon from Toyota.