Vehicle involved in a accident. Vehicle brake system did not work. Driver had foot on brake pedal. Anti collision break system did not work, vehicle slid for 20ft into a stopped for. 2019 Prius was going 35 mph before risk of collision was realized. Significant damage done on passenger side bumper. No air bags deployed.

- San Pedro, CA, USA

I was traveling at about 55 mph on highway 66 when the instrument panel began flashing the following warnings: "braking power low, phsb malfunction, parking brake low, pre-collision malfunction, anti-lock malfunction, lane deparrure malfunction, brake overide". the only obvious symptom was that there was no brake boost - the brakes continued to function, but without power assist. I am a former auto mechanic, so I would have noticed if there were any other symptons. The dealership had the car for 3 weeks and ultimately replaced both the brake booster and the master cylinder. They initially replaced the booster and discovered that that did not fix whatever was causing the warnings and dtcs. Toyota instructed them to replace the master cylinder and that apparently fixed the problem. They could not explain why a fault in the master cylider would have caused the array of symotoms observed by both myself and the mechanics. I was surprized that the master cylinder was the cause as the the loss of boost seemed to be a brake boost problem. I was told that Toyota is aware of the problem and that it is widespread.

- Falls Church, VA, USA

I was turning to exit a freeway and all of a sudden my car came to a stop (about 55mph to 0) in a matter of seconds with no warning. It then took a few seconds before I was able to get the gas to work again. No cars were around me luckily.

- Watsonville, CA, USA

Bought a new 2019 Prius from grossinger Toyota on 9/13, went back to the dealer on 9/16 to get my old city sticker from my old car (this new car only had 61 miles), the new car broke while I was there. The entire dashboard went off (blinders cannot be turn on. No indication of speed, no indication of vehicle level, etc). Anything that's on the dashboard went blank. I turned on and off the new card a few time, but the result was the same. Toyota technician couldn't figure out what went wrong themselves. When that happened, I was just about ready to leave the dealer, then I quickly went back to show the grossinger dealer.

- Chicago, IL, USA