Toyota Prius engine failure problems

Filed Sep 22, 2026 · Engine · NJ

Coolant leak into the engine, confirmed by the Toyota servicing center. This may be a common problem with the Toyota Prius, causing early engine failure from a design defect.

Filed Mar 15, 2026 · Engine · PA

the cylinder head gasket blew because of the poor design of the intake manifold and the EGR system. There are updated parts to fix this issue, but there was no recall. This poor design led to the vehicle having "the Death Knock." It started doing this knock on my trip driving my daughter to college. The engine could have seized in traffic on the way to [XXX] from [XXX] . No warning lights came on telling me there was an issue. The vehicle is being taken apart now to see if my connecting rods were bent from the coolant entering the combustion chamber. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 2, 2025 · Brakes, Fuel system · NC

The contact owns a 2010 Toyota Prius. The contact stated that while driving 70 MPH, the vehicle jerked, and the vehicle failed to accelerate as intended while depressing the accelerator pedal. Additionally, the steering wheel seized, and the vehicle stalled. The contact pulled over to the side of the road, opened the hood, and disconnected and reconnected the battery terminals to reboot the vehicle. The contact stated that a yellow triangle warning light and the check engine warning light were illuminated. The message "Check Hybrid System" was displayed. The contact was able to restart the vehicle; however, the vehicle failed to exceed 65 MPH while driving. The ABS warning light was illuminated. The contact took the vehicle to Auto Zone and O'Reilly's; however, no cause for the failure was found. The vehicle was then taken to the dealer. The contact was informed that the failure might be an ABS system failure. The vehicle was not repaired due to the cost. The contact stated that the failure first occurred years ago, and the failure persisted. The manufacturer was not notified of the failure. The failure mileage was unknown.

Filed Oct 21, 2025 · Suspension · WV

Took vehicle in for new tires and alignment at 47,302 miles on the odometer. I was informed that a camber bolt was completely seized and that the right rear control arm busing was bad/missing. My car is just over a year old and has been vibrating for a while at interstate speeds. I thought it was a belt broken in a tire as they were reaching the time to be changes but weren't at the wear marks. I did have one tire that the inside was worn and starting into the belt most likely because of the misalignment from the bad/missing right rear bushing. With the car being so new and used mostly on the interstate, I felt this may be a saftey issue for failing bushings on suspension components.

Filed May 29, 2025 · Brakes · IL

Toyota defective ABS system- revised master cylinder&brake booster pump never changed by dealership except misleading inspection and breach of recall in 2020. The incident happened last year in Sep 2024 dangerous on hwy or freeway. Thank got I was on the side street with beeping vehicle and codes on the dashboard, barely with serious risk went back home! As a defective parts they should be replaced for free or customer should received reimbursement! A professional dealer who performs ONLY AN INSPECTION for a “recall” in 2020 should replace the factory-damaged part and not brazenly wait for the codes to appear on the dashboard, depriving the customer of free replacement of the factory-defective ABS system. "the complaint was originally filed over the Toyota hybrid system problems in Feb. 2020, presenting claims on behalf of owners of certain 2010 through 2015 Toyota Prius and Prius PHV, 2012 through 2015 Toyota Prius V, 2012 -2014 Toyota Camry Hybrid and Toyota Avalon Hybrid vehicles that contain the defective braking system" ... This complaint accuses Toyota of placing PROFITS before the lives and safety of hundreds of thousands of drivers and passengers whose brakes are defective, but must wait for the potentially life-threatening brake booster defect to occur before the manufacturer will address it. The lawsuit ; ;"presents claims of breach of warranties, false advertisement, illegal sales practices, fraudulent concealment, unfair and deceptive trade practices, unjust enrichment and various other allegations on behalf of hundreds of thousands of impacted vehicle owners across the nation". Similar problem with defective piston rings in my engine which was burning oil under 85-87k based on NEW WORLD ORDER which cost catastrophic engine failure in so many brands and models -2010-2025 Toyota is playing idiotic game about defective products/parts from Toyota Motor Corporation #8rebuild engine [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 12, 2024 · Engine · FL

The Gas Engine had internal destruction Cylinder broke and car became unusable at 158K miles despite being a Hybrid with al Toyota maintenance at Al hendrickson toyota of Coconut Creek, FL. This is Unacceptable and Demonstrate Internal Combustion Engine Failure that fortunately occurred near my house and NOT in the hiway. Please notify Toyota Motor Company because I had to buy a new car and we are SENIORS with limited budget. It is a severe Safety Concern.

Filed Sep 3, 2024 · Brakes · CA

On the way home from a family vacation, the brake warning light, ABS warning, and swerve warning lit up on our 2013 Toyota Prius's dashboard. It was evening already, and with only a few miles to go we continued toward our home. While driving at approximately 50 mph, a red light appeared around a bend. I hit the brakes, a little hard, but certainly with enough time to safely stop. The brakes completely locked and the tired screeched and let off smoke, while the back of the car fishtailed around until we were sideways. It was terrifying. I believe the anti-lock brakes failed, and when they seized up it caused loss of control of the vehicle. Fortunately, no other vehicle was in the left turning lane, where we ended up, and we did not pass into the intersection. No one was hurt, but we could easily have been if not for good luck. I have noticed that the Toyota Prius has had a number of warning and warranty extensions due to brake actuator [XXX] ) and that several class-action lawsuits are underway. We would like to report our problem for the safety of others. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 26, 2024 · Brakes, Electrical · 299,999 miles · MN

The contact owns a 2005 Toyota Prius. The contact stated that while driving at an undisclosed speed, the brakes seized. In addition, the contact heard a squealing sound and the ABS warning light illuminated. The contact used the parking brake to stop the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The contact stated that the odometer was inoperable and failed to display the correct mileage. The contact stated that the odometer was stuck on 299,999.

Filed Feb 13, 2024 · Engine · PA

I pushed on the gas, the car started mildly shaking under the hood( the engine) then I released my foot off the gas and the shaking ceased. I the. Attempted to accelerate again and the car started violently shaking so I released my foot from the accelerator and turned the car while coasting onto a side road where I traveled back home. Had the car towed to mechanic. He said the engine needs to be replaced as the pistons are damaged. My car has 196,000. I will have the engine replaced as my other 2012 engine just did the same similar thing and I am out two Priuses with blown engines. There were no warning lights and no previous issues or signs prior to the catastrophic events.

Filed Jun 18, 2023 · Brakes · PA

I took my vehicle to my mechanic at my independent service center because I experienced shaking/significant vibrating at 60 mph. I had also experienced a loud noise that only lasted about 2 miles. He found that the right rear brake unit, specifically the caliper, had seized. I contacted Toyota of America because there was no brake warning light to alert us of this situation. I received a call back from David from Sloane Toyota in Glenside, PA, who confirmed that the caliper seizing would not cause the brake warning light to appear. He also indicated that the caliper is not something that is routinely checked as part of state inspection, or the regular maintenance schedule. I am deeply concerned that this mechanical failure of the brake unit could have resulted in death(s). I request that Toyota vehicle owners and mechanics be alerted to this, specifically the fact that the brake warning light does not alert a driver of this brake part failure. Further, I request that an inspection of the calipers be included in the routine maintenance schedule and annual state inspection. Thank you for the work that you do to keep us safe!