2011 Toyota Prius Complaints

Every time I'd press the brakes there'd be an audible "click" noise and then when taking my foot off the brake it'd sound like a manual tire pump being pressed... kind of like air filling / hydraulic sound. This worried me (I don't mess around with brakes). One other thing that would happen is if I pressed the brake hard enough, the automatic braking system would kick in. The Toyota dealership claimed they couldn't hear anything and there were no warning lights so I took it to a reputable local mechanic. They diagnosed it as a bad ABS Actuator / Brake Booster and said it's common with this year of Prius. They also said it was good I brought it in now because it was not severe enough to totally fail (which could have caused an accident) but there was evidence of degradation and they also said the issue was causing sufficient brake fluid to not get where it needs to be.

Vehicle Information: Year: 2011 Make: Toyota Model: Prius Mileage at Failure: 58,769 miles Date of First Use: February 20, 2012 Complaint Description: As I was driving on the freeway, my 2011 Toyota Prius brakelights all came on. I pulled off, had it towed to nearest mechanic, who diagnosed a failure involving the brake booster, brake actuator, and ABS system at only 58,769 miles. The vehicle was diagnosed with Diagnostic Trouble Code C1391 (Abnormal Leak of Accumulator Pressure). According to my mechanic, the condition is caused by an internal brake fluid leak within the brake booster assembly with master cylinder. The recommended repair includes replacement of both the brake booster assembly with master cylinder and the brake booster pump assembly. The estimated cost of repair is approximately $4,100. This concerns me because the brake system is a critical safety component, and I believe such a failure at fewer than 60,000 miles is highly unusual and may pose a safety risk to dri...

Shortly after purchasing used last year I had my brake, traction control, ABS, & TPMS lights come on when stopping at a stop light all at once. I went and had it scanned and no codes showed up. I hear a buzzing from the brake actuator/ brake pump every 15 seconds. This all has been going on for almost a year now. Over the weekend a loud buzzing warning alarm came on that will not turn off. I had it checked out and was quoted around 3500 to repair.

The ABS actuator (brake booster) went out suddenly. It is 100% available for inspection. It is being towed to M&M Auto Repair in Gaston SC. I was not sure if the car was going to stop when I was trying to figure out what was wrong. The car was acting like it wasn't going to stop until a few seconds later. People online have had a similar problem as me with prius models around my year to 2015. And it was a problem confirmed by the dealership. The component has not been inspected. Only diagnostics were ran. The ABS system light came on. But it would disappear for a long time then come back. So I thought it was a computer error for the longest until it proved to not be one. Because the brakes were working just fine like normal. Other than that, the light itself was playing peekaboo with me, making me believe that it was a computer error since the brakes were working just fine. Then on monday, the car started beeping excessively and the brakes were not working suddenly after being fine ove...

There is a known problem with the brake booster and skid control that was a part of an customer support extended recall program. Our Prius has very low miles (less that 60,000) so the issue didn't trigger for us until recently. Unfortunately, we are out of the extended recall program of 10 years or 150,000. This doesn't seem fair since it is a known and documented issue from Toyota. Unless we fix the issue, we are at risk of losing braking control. All brake lights on the dash are on and it is currently in the shop.