2012 TOYOTA PRIUS Complaints

There is no incident occurring to me .but I change some parts like head light.& whisper .engine .

My Prius V experienced brake failure today, with three warning lights appearing at once and the brake pedal not engaging the brakes unless it was pressed almost to the floor. This made it feel extremely scary and unsafe to drive. I was very upset to see that this is a recurring problem with Prius cars in this age range. Although I only have less than 120,000 miles on it, Toyota is not offering an extended warranty for the failing parts (brake master cylinder and actuator and booster) past 10 years or 150,000 miles. This is total BS if they already know that there is a problem with these parts.

Diagnostic code C1391 abs system. Brake accumulator pressure leak. This a known issue and common problem. $3000 dealer only repair. There was a customer service program and extended warranty. This is a major safety issue and Toyota has stopped offering any repair support and expects customers to cover the full repair price themselves.

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My teenage daughter was driving and almost had an accident because the brakes failed. No warning lights came on until the brakes failed. I am learning now that it is a brake booster pump that Toyota knows about it as they had issued an extended warranty on the same thing that expired last year. Toyota confirmed that my Pruis was included in the customer service program but it has now expired.

In July of 2021 the Toyota dealership replaced the inverter on my 2012 Prius V. At the time, it also was exhibiting signs of the brake booster and pump failure as outlined in CSP 20TE07 (see https://www.toyoheadquarters.com/threads/2012-2014-toyota-prius-v-2015-toyota-prius-v-coverage-for-brake-booster-and-brake-booster-pump-assemblies-csp-20te07.2116/). It was inside the extended warranty period, but they would not fix it at the time, because it was not throwing diagnostic codes. Subsequently, the braking system malfunctioned, nearly causing a high-speed accident on the freeway. With diagnostic lights now showing, and code C1391 stored in the OBD system, I took the car back to the dealer, but now they said it was past the 10 year limit and still would do nothing about it. This is not acceptable! They knew the brake system was failing and a safety hazard, but would not address it, just because it hadn't actually failed yet. Toyota needs to further extend the warranty and take care of this brake failure past 10 years and 150,000 miles. Just because I took good care of my car and the brakes didn't fail as early as other owners, I should not have been subjected to the risk of brake failure or the high cost of repairing the brake system when Toyota took care of this problem for so many other hybrid owners. Please help.

The contact's wife owns a 2012 Toyota Prius V. The contact stated that while his wife was driving at an undisclosed speed, the brake pedal was depressed and went to the floorboard. Additionally, the brakes intermittently failed to stop the vehicle immediately. Several unknown warning lights were illuminated. The vehicle was taken to the dealer, where it was diagnosed, and the mechanic retrieved DTC code: C1391. The contact was informed that the ABS actuator and pump assembly needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 160,000.

The contact owns a 2012 Toyota Prius V. The contact stated that while her husband was driving at an undisclosed speed into the dealer's parking lot, the brakes failed to stop the vehicle immediately. The brakes, ABS, and several other unknown warning lights were illuminated. The contact's husband then shifted the transmission into neutral (N) and coasted until the vehicle came to a complete stop. The dealer diagnosed the vehicle with DTC codes: C1252, C1253, and C1256, and determined that the brake booster and ABS pump needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 166,000.

While coming to a stop there was a loss of braking power and feel. Due to the unexpected change in braking characteristics this nearly caused me to collide with the vehicle in front of me. Noticed the traction control, ABS and Brake light on dash illuminated. My local Toyota dealership has diagnosed the repair as a repair involving the brake booster master cylinder and pump assembly.

ABS Unit failure (may also be called ABS CONTROL MODULE ACTUATOR AND PUMP ASSEMBLY). Three mechanics, including a Toyota dealership, is unable to reset the system to correct. The PCS system cannot be disabled which, in turn, means cruise control is no longer operable.