2019 Toyota Prius

Frequency when I start car makes a very loud , painful high pitch noise for anywhere from 5-15 seconds

Reported

Jul 2026

Incident date

Jul 2026

Mileage

Not provided

Outcome flags

None reported

Body of car has rust perforation starting from the inside working out. This is on the roof, so water incursion will effect airbags and electrical system. FIrst noticed rust bubbles a few years ago, but did not think much of it. Now two body shops have said roof panel needs to be replaced. This is big stuff!

Reported

Jan 2026

Incident date

May 2024

Mileage

Not provided

Outcome flags

None reported

See Attachment

Reported

Oct 2025

Incident date

Oct 2025

Mileage

Not provided

Outcome flags

None reported

Since October 2023, my 2019 Toyota Prius has developed severe and unpredictable driving behavior after a regular brake service, which may have triggered or coincided with a software or ECU update. The car, which had been driving smoothly since I bought it in 2021, suddenly began showing false braking, steering interference, and lane instability — as if the car were trying to “correct” problems that didn’t exist. These interventions often happen on highways or during turns, creating serious safety risks for both driver and passengers. I’ve spent months and thousands of dollars replacing parts, performing alignments, and recalibrating sensors, including at Toyota dealerships. The problem persists because it is software-based, not mechanical. I discovered that in mid–2023, the NHTSA announced upcoming rules requiring Automatic Emergency Braking (AEB) with pedestrian detection by 2029. Around that same time, reports from multiple drivers (Toyota, Honda, Hyundai, Ford, Subaru) began to appear describing the exact same issues. It seems manufacturers began silently updating vehicles to meet anticipated compliance standards. However, this introduced overly sensitive and malfunctioning driver-assist systems. The most alarming part is that the driver cannot fully disable these features — the “off” button only reduces their intervention. This means when the system malfunctions, the driver is forced to operate an unsafe vehicle. As a professional rideshare driver, this problem destroyed my ability to work. Passengers reported me for unsafe driving because of the car’s erratic behavior. I eventually lost my vehicle and income. I believe this is a systemic safety defect linked to premature or unregulated implementation of AEB software. Drivers deserve the right to fully disable malfunctioning systems that endanger lives. This is not just a car issue — it’s a public safety crisis that must be urgently investigated.

Reported

Oct 2025

Incident date

Oct 2023

Mileage

Not provided

Outcome flags

None reported

Coolant system failed because coolant was leaking into catalytic converter. Two mechanics in two different states (one a Toyota dealer) claimed this is defect with 2019 Prius and results in repair costing more than $2000.00 because of this design flaw. Warning light did not come on until coolant was gone.

Reported

Aug 2025

Incident date

Jul 2025

Mileage

Not provided

Outcome flags

None reported

The contact owns a 2019 Toyota Prius. The contact stated there was a coolant leak and the coolant level was low. There was no indication of coolant on the ground. The check engine and engine HOT warning lights were illuminated. The contact stated that the failure was related to TSB: 0135-19. The vehicle was taken to the local dealer where it was diagnosed that there was a coolant leak in the front exhaust pipe heat exchanger. The parts to repair the vehicle were on backorder. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 95,000.

Reported

Jun 2025

Incident date

May 2025

Mileage

Not provided

Outcome flags

None reported

Exhaust heat-exchanger coolant pipe (part of the hybrid cooling loop) on my 2019 Toyota Prius is the system that failed. Safety risk: complete loss of coolant can cause sudden engine overheating and possible power reduction or shutdown while the vehicle is moving. I transport two young children daily; an unexpected stall on a highway or during an intersection turn would put all occupants and surrounding traffic at risk. AutoNation Toyota Mall of Georgia (dealer) inspected the car on 22-May-2025, confirmed the leak, and advised the vehicle is unsafe to drive until the pipe is replaced. Repair estimate is $2,249 parts & labor to replace the front exhaust pipe that is on back order, no ETA. Toyota Corporate (Brand Engagement, Case # 250522002498) is aware; they escalated the file to their Parts Department because the replacement pipe is back-ordered with no estimated arrival date. No other agencies or insurers have inspected the vehicle. Two days before the dealer visit, the warning symbol began flashing briefly at breaking then for longer intervals while driving. On the morning of 22-May-2025 the lamp was flashing more often and longer prompting the service appointment. Dealer found the coolant reservoir completely empty. No prior warning messages had appeared.

Reported

May 2025

Incident date

May 2025

Mileage

Not provided

Outcome flags

None reported

* I was pulling into a parking space at a slow speed. When I applied the brake the car accelerated causing the car to scrape the car next to the space. The car then stopped. * The acceleration was out of my control and the brakes did not stop it. Fortunately there was no person in front of me. * The Tow truck operator who came to get the car experienced the same issue when pulling into the bay at the dealer. I do not know about the manufacturer during their inspection as they did not provide me with that information. * Toyota had an inspection performed and that report was submitted to Toyota on August 20. We just received notification from Toyota that they found no problem with the car. * No warning lights noted.

Reported

Oct 2024

Incident date

Jul 2024

Mileage

Not provided

Outcome flags

Crash

The issue is with the back middle seat belt. When the back right passenger seat, which is a 2/3 seat is placed down in order to accommodate long pieces of lumber, it remains stuck there as the seatbelt for the middle seat will not release. The seatbelt mechanism for the middle seat is located in the 2/3 seat which is stuck in the down position. Therefore, we cannot use the middle seat nor the back right seat because the seatbelt for the middle seat is locked in place and not releasing. So the back right seat is lying down and stuck there as the seatbelt for the middle seat is locked unable to release. Living alone, I rarely use the middle seat for passengers. Honestly, that seatbelt has probably only been used five times in five years. Obviously, this poses a Safety problem.

Reported

Oct 2024

Incident date

Oct 2024

Mileage

Not provided

Outcome flags

None reported

I was idling at a parking space and went to turn off my car. The vehicle surged forward and the BRAKE sign came on. I pushed my brake to the floor and nothing happened. I was moving toward a brick wall so I put in in reverse and the car surged backwards. The BRAKE sign came on and I pushed the brake to the floor and again nothing happened and I ended up hitting the car behind me. I immediately took my car to the dealership where they kept it for 3 days and said they could find nothing wrong and it was safe to drive. I just got it back from having the body work done and am afraid to drive it as this might happen again or worse. I am reporting it to let you know and to see if this has occurred and been reported as happening in this make and model previously. I also have 2 witnesses to what happened.

Reported

Apr 2024

Incident date

Apr 2024

Mileage

Not provided

Outcome flags

Crash

On Saturday [XXX], while shifting to reverse in a back alley to back up slowly, the car engine suddenly and loudly revved and shot backwards at accelerating speed. I slammed on brakes which did not respond at all, thus forcing me to attempt to shift gears which also failed to stop the acceleration. Car only stopped because it went up a curb and hit the corner of a parked vehicle in a neighbors driveway. If I had been on busier street and not a back alley this could have resulted in numerous vehicle collisions and unimagined fatalities. Car is being towed on [XXX] to Advanced Collision Repair on 4511 Central Ave, Columbia Heights, for diagnostic assessment. There were no warning lamps, messages or other indicators prior to this terrifying lack of vehicle control . This was first episode since purchasing car approx one year ago. Incident was captured on neighbor’s home camera. Other neighbor heard the revving and ran out due to spontaneously loud revving of an engine. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Reported

Feb 2024

Incident date

Feb 2024

Mileage

Not provided

Outcome flags

Crash

Vehicle was involved in a accident and it was a total loss and no airbags deployed There wasBodily injury due to this accident

Reported

Dec 2023

Incident date

Nov 2023

Mileage

Not provided

Outcome flags

Crash 1 injuries

This complete set of Dunlop Enasave 01 A/S 195 / 65 R 15 91S tires has failed in a short span of time. At the beginning of October, we noticed a slight warbling while driving at any speed. An inspection by Les Schwab tires revealed exposed steel belting on the inside of one of the tires, although a quick check found all four tires were failing. A subsequent inspection by our local Toyota dealership found the same problem, with the additional information that the cords had snapped on all four tires. It is relevant to note that these tires only have 44K miles on them, and that the vehicle is garage kept and not exposed to abnormal conditions.

Reported

Nov 2023

Incident date

Oct 2023

Mileage

Not provided

Outcome flags

None reported

The vehicle has started to exhibit a wobbling feeling when driving, similar to when there is a bubble or blister in the tire. At only 4 years old, and with only 44K miles, we knew this shouldn't be the problem. An inspection by Les Schwab Tires, as well as the Toyota dealership where we purchased the vehicle new confirmed that all four tires are damaged, i.e. the "cords snapped" on the belt, exposing the nylon and steel belts, and putting the vehicle in danger of a blow-out on all four tires. We first noticed this around the beginning of October.

Reported

Nov 2023

Incident date

Oct 2023

Mileage

Not provided

Outcome flags

None reported

Re: Front left and right Toyo Tires (195/65R15 ) Having passed MA state inspection at the end of August my husband and I headed out for a 500 mile road trip. I purposely went back to the station that did the inspection and asked if the tires looked okay for this trip. I was assured they would be fine. But 100 miles into the trip the front end was shimmying so badly my husband's leg in the passenger seat was vibrating. He didn't sleep that night and said, "I think we should look into new tires if we're going to continue." I found a Town Fair Tire store in Northhampton, MA and booked an appointment. On arrival one of the specialists came out to inspect the tires I wanted to change out and he stopped in his tracks to shake his head in disbelief. His words were, "You have been driving on secondary rubber and just last evening a woman was towed in with her Prius, same year, same mileage but she had blown a tire because of the poor tread." That was all I had to hear. It would be different if it was just me but here were two of us with 34,000 miles on our Prius' and horribly worn out tires. What's the likelihood of that? I am sick thinking that Toyota stuck such cheap tires on a car which could have threatened our lives. Greed is what drives these decisions and it has to stop!

Reported

Sep 2023

Incident date

Sep 2023

Mileage

Not provided

Outcome flags

None reported

This happened about 3 weeks ago. I drove to work on local roads with no incidents of debris hitting windshield - no visible cracks. After my shift I spotted about a three foot crack in the middle of windshield leading down to passenger side. No warnings or symptoms of a problem. Although car is 2019, I have less than 16000 miles on it & most of my driving is highway & local roads. I’ve read that 2016-2017 Prius had this issue with lawsuit pending which also stated safety concerns over early warning detection system failing due to windshield cracks. Toyota (on phone) said it would cost 1200 to replace. I bought the extended warranty but it doesn’t cover the windshield. No inspection done except by coworkers.

Reported

Aug 2023

Incident date

Aug 2023

Mileage

Not provided

Outcome flags

None reported

A few weeks ago, at around 10pm, when I was driving on the freeway, my car’s engine temperature warning light suddenly on. The next day, I immediately sent my car to the dealer for a check up, the report stated ‘’ coolant reservoir very low. Pressure tested system found exhaust center pipe leaking coolant internally’’. I was surprised by the problem as I only drove this car for around 3.5 years with 70,000 miles, after talking with friends and doing research, I just realized that was problems for many Toyota owners. I was told by the dealer, the total cost for repair is over $2000 as my warranty had already expired. I believed this is the problem of Toyota, as the part is at flaw and the sudden overheating of engine is really scary. It might endanger people life and property.

Reported

Apr 2023

Incident date

Mar 2023

Mileage

Not provided

Outcome flags

None reported

The contact owns a 2019 Toyota Prius. The contact stated while at a complete stop, another vehicle crashed into the rear of the vehicle and the vehicle began to accelerate unintendedly. The air bags failed to deploy. The brake pedal was depressed but failed to respond. The contact stated that he was able to prevent a crash by avoiding several vehicles while continuously depressing the brake pedal. The brake pedal responded; however, there was 62-100 ft. stopping distance delay. The contact veered to the side of the road for a moment. The contact stated that as he restarted the vehicle, the vehicle operated as needed. There was no warning light illuminated. There was no police report filed. There was no injury sustained. The contact was able to drive to his workplace. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 78,000.

Reported

Jan 2023

Incident date

Jan 2023

Mileage

Not provided

Outcome flags

Crash

Whenever it rains the warning message clean parking assist sensor comes on while you are driving. Even after you clean the sensors the warning continues to beep contiously. You can press the back button but it will not stop. Also proximity sensor comes on with this incident. After the rain stops the problem stops.

Reported

Jun 2022

Incident date

Jun 2022

Mileage

Not provided

Outcome flags

None reported

At low speeds when the windows are down and music is playing on the internal speakers, it can drown out the pedestrian warning sound making it impossible for pedestrians to hear it

Reported

Feb 2022

Incident date

Feb 2022

Mileage

Not provided

Outcome flags

None reported

The contact owns a 2019 Toyota Prius. The contact stated that upon depression of the brake pedal, pulsation in the brake pedal could be felt without warning. Upon taking the vehicle to a dealer, he requested to have the rotors checked for any defects. He was given a service report that stated that the rotors needed to be replaced. Upon taking the vehicle home, the contact inspected the vehicle himself and discovered corrosion on all four of the brake rotors. The contact took the vehicle back to the dealer where they confirmed the failure and informed him that there were no recalls on the vehicle and that the brake rotors were not covered under warranty. The manufacturer was notified of the failure and he filed a complaint. The vehicle had yet to be repaired. The failure mileage was approximately 11,000.

Reported

Oct 2021

Incident date

Sep 2021

Mileage

Not provided

Outcome flags

None reported

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.

Reported

Jan 2021

Incident date

Dec 2020

Mileage

Not provided

Outcome flags

Crash

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.

Reported

Sep 2020

Incident date

Aug 2020

Mileage

Not provided

Outcome flags

None reported

PRIUS STALLS IN THE RAIN DESPITE NOT BEING A RECALLED MODEL. PCS SENSOR IS AFTERMARKET, PEDESTRIAN WARNING ALERT NOISE IS OFFLINE, SUSPENSION IS CRACKED, ENGINE MAKES CREAKING NOISE AT LOW SPEED TURNING. I WORKED FOR TOYOTA AS A SALESPERSON AND THEY REALLY TOOK ADVANTAGE OF ME. *TR

Reported

Jun 2020

Incident date

Jan 2020

Mileage

Not provided

Outcome flags

None reported

I BOUGHT A BRAND NEW 2019 PRIUS FROM THE DEALERSHIP THAT I WORK AT. ONLY A MONTH LATER, THE PRE COLLISION SYSTEM STARTED BECOME UNAVAILABLE AND THE ENGINE STARTED MAKING A LOUD CRANKING NOISE. I TOOK IT TO TOYOTA AND THEY TOLD ME THAT THE PCS MILIMETRE WAVE SENSOR WAS MISSING FROM THE CAR. THEY ALSO DID NOT WANT TO FIX THE ENGINE PROBLEM OR EVEN LOOK INTO IT DESPITE STILL HAVING WARRANTY LEFT.

Reported

Mar 2020

Incident date

Feb 2020

Mileage

Not provided

Outcome flags

None reported

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.

Reported

Oct 2019

Incident date

Oct 2019

Mileage

Not provided

Outcome flags

None reported

OUR PRIUS WAS INVOLVED IN FRONT TO PASSENGER SIDE COLLISION, WHICH TOTALED THE PRIUS, YET NO AIRBAGS DEPLOYED DURING THE ACCIDENT. THE PRIUS SHOULD HAVE BEEN EQUIPPED WITH SIDE AIRBAG AND PASSENGER AIRBAG, WHICH BOTH FAILED EVEN THOUGH THOSE AREAS WERE IMPACTED.

Reported

Oct 2019

Incident date

Oct 2019

Mileage

Not provided

Outcome flags

Crash 1 injuries

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.

Reported

Sep 2019

Incident date

Sep 2019

Mileage

Not provided

Outcome flags

None reported

TOYOTA PRIUS 2019 CAN ONLY CHANGE ITS MAP MODE FREEWAY EXIT INSET WHILE DRIVING AT 55 MPH. I MUST TAKE MY EYES OFF THE ROAD TO FIND AND PRESS THE CORRECT BUTTONS ON THE NAVIGATION SCREEN. SEEMS TO BE A PROBLEM WITH ALL GENERATION 4 PRIUS'S. YOU CANNOT CHANGE IT WHEN PARKED. THE PICTURE SHOWS THE OPTIONS WHEN PARKED.

Reported

Sep 2019

Incident date

Sep 2019

Mileage

Not provided

Outcome flags

None reported

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2019 Prius vehicles. An electrical short circuit in the combination meter could occur, causing the speedometer, the odometer, and the fuel gauge to go blank. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 101, "Controls and Displays."

Risk: A blank main display will not show important information like vehicle speed or fuel level. Driving with an inoperative display can increase the risk of a crash.

Remedy: Toyota will notify owners, and dealers will inspect the flash memory chip (ROM) production date, and if necessary, replace it along with the combination meter circuit board, free of charge. The recall began February 7, 2020. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's numbers for this recall are 19TA21 and 19TB21.

Gulf States Toyota (GST) is recalling certain 2019 C-HR, 4Runner, Avalon, Avalon Hybrid, Camry, Camry Hybrid, Highlander, Land Cruiser, Prius, RAV4, Sequoia, Tacoma, Sienna, Tundra and Yaris vehicles. The text on the load capacity label may become illegible. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 110, "Tire Selection and Rims."

Risk: If the driver cannot read the label, they may unknowingly overload the vehicle, increasing the risk of a crash.

Remedy: GST will notify owners, and dealers will provide corrected load carrying capacity modification labels, free of charge. The recall began May 24, 2019. Owners may contact GST customer service at 1-800-444-1074. GST's number for this recall is 19R1.

Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2019 Lexus LS500, LC500, ES300h, UX250h, LS500h, Toyota Prius, RAV4 HV, 2019-2020 Toyota Prius Prime, and 2020 Corolla HV vehicles. The brake booster pump may fail causing a deactivation of the Vehicle Stability Control system and a loss of braking assist. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control Systems."

Risk: Deactivation of the vehicle stability control system or a loss of braking assist increases the risk of a crash.

Remedy: Toyota will notify owners, and dealers will inspect and, if necessary, replace the brake booster pump, free of charge. The recall began September 20, 2019. Toyota owners may contact Toyota customer service at 1-888-270-9371 and Lexus owners may contact Lexus customer service at 1-800-255-3987. Toyota's numbers for this recall are K1L/K0L. Lexus' numbers for this recall are K2F/KLF.