2017 Toyota Prius Complaints

ENGINE,FUEL/PROPULSION SYSTEM — Filed 05/19/2026

The catalytic converter heat exchanger failed internally, causing coolant to leak into the exhaust system. Symptoms included white smoke from exhaust and coolant loss with no visible ground leak. This is a documented factory defect per Toyota Technical Service Bulletin T-SB-0135-19 affecting 2016-2019 Prius models. Toyota has denied warranty coverage despite the vehicle was originally bought & spent its entire prior operational life registered in New York, a state covered under Toyota's full 15-year/150,000-mile emissions warranty. Defect was confirmed by an authorized Toyota dealership, in PA. Vehicle had approximately 83,104 miles at time of diagnosis. Manufacturer denied coverage and is forcing the customer (me) to pay a huge amount for this very well known & defective case. MOST IMPORTANTLY ITS dangerous and unsafe for all the cars our there too, since it is very well known that at a certain point this will happen, but despite TOYOTA never sent a RECALL. Due to this, engine light goes on & off, refrigerant is flammable and leaks in the exhaust pipe happens with this specific case, which ultimately could catch on fire, while the vehicle is moving or stalling. Lots of white smoke comes out of the car that directly impact the environmental aspects, and above all, people owning such vehicle, will be running into this issue, which will 100% put the safety of owner and anyone close in proximity to their vehicle at RISK. PLEASE ADD RECALL WITHOUT CAP for ALL SUCH TOYATA PRIUS due to flammable refrigerant leak inside the car engine components, and proven via strong white smoke coming out of exhaust that has the potentially to put the entire car on fire, specifically.

ELECTRICAL SYSTEM — Filed 09/10/2025

Odometer Fraud. The contact purchased a 2017 Toyota Prius. It was discovered when the contact listed the vehicle for sale that there was a mileage discrepancy. The vehicle was as a private sale. At the time of the purchase, the mileage was 126,611. The potential purchaser provided a CARFAX report that recorded the mileage on 11/6/2024 at 225,810.

STRUCTURE,UNKNOWN OR OTHER — Filed 09/23/2024

Standing at a red light and someone rear ended

FUEL/PROPULSION SYSTEM — Filed 07/18/2025

During hot temperatures and after coming to a full stop, the car stalls/hesitates significantly (5-6seconds) when pushing the gas pedal. The car eventually proceeds but the issue reoccurs. It can only be intermittently reproduced and no codes are shown on the car dashboard. Mechanics are unable to identify the source of the issue so it cannot be resolved.

ENGINE AND ENGINE COOLING — Filed 02/21/2025

The contact owns a 2017 Toyota Prius. The contact stated that while driving approximately 25-30 MPH, the vents were blowing out cold air. The check engine warning light was illuminated. The contact was adding coolant to the coolant reservoir every three to four days. The vehicle was taken to the local dealer, where it was diagnosed and determined that the coolant was leaking into the exhaust pipe. The dealer recommended that the exhaust system front pipe be replaced. The manufacturer was contacted, opened a case, and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 81,700.

POWER TRAIN — Filed 06/17/2024

The contact owns a 2017 Toyota Prius. The contact stated while the contact's wife was driving at an undisclosed speed, the accelerator pedal was depressed. The accelerator pedal was depressed, however the vehicle failed to accelerate as intended. The contact stated that the vehicle stalled and jerked. The vehicle was driven to the residence. The contact stated that the battery indicator did not look as if the battery was charging. The contact stated that the vehicle was taken to two independent mechanics; however, the failure was not duplicated. In addition, the vehicle was taken to the dealer; however, the failure was not duplicated. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The contact stated that the failure had become persistent. The contact stated that during one failure his wife was driving, and the vehicle lost motive power and stalled. The vehicle failed to restart. The vehicle was towed to an independent mechanic however, the failure was not duplicated. In addition, the contact stated that during one failure, the excessive acceleration warning light illuminated. The contact had not depressed the accelerator pedal during the failure. The manufacturer was made aware of the failure and a case was filed. The contact was informed that no assistance was available. The failure mileage was approximately 68,000.

ENGINE,FUEL/PROPULSION SYSTEM — Filed 03/21/2024

Dear NHTSA, I am seeking assistance and compensation for ongoing warranty and repair issues with my Toyota Prius. Key Incident Timeline: •March 21, 2024: Dashboard message “Grille Shutter Inoperable” •March 25, 2024: Toyota of Glendale visit •Charged $220 for diagnostics •Refused to honor service bulletin •Vehicle mileage: 149,217 Customer Service Interactions: •April 9, 2024: •Contacted Toyota customer service •Confirmed CA emissions coverage to 150,000 miles •Discovered extended warranty unexpectedly canceled Brand Engagement Claim: •April 9, 2024: Filed claim with Toyota’s Brand Engagement line •June 26, 2024: Claim denied, dealership’s decision upheld Repair Challenges: •July 5, 2024: Wondries Toyota diagnostic visit •Charged $200 for diagnostics •Confirmed active service bulletins would have covered repairs Repair Management: •Northeast Mechanic has handled all subsequent repairs due to Toyota’s failures Financial Losses Breakdown: •Initial diagnostic fee (Toyota of Glendale): $220.00 •Diagnostic fee (Wondries Toyota): $200.00 •Car rental (July 6, 2024 - Hertz): $1,356.17 •Car parts: $1,706.55 •Labor on vehicle: $754.22 •Water pump: $167.78 •Head Gasket, Spark Plugs, Engine Water Pump: $2,161.00 •Total financial loss: $6,565.72 I request a comprehensive investigation into these warranty and repair issues, seeking full compensation for the financial burden caused by Toyota’s repeated failures. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

UNKNOWN OR OTHER — Filed 07/21/2024

While driving the speed limit of 70mph on a major highway, the sunroof on my 2017 Toyota Prius exploded. There was no warning of any kind: no other traffic nearby so no rock or debris from another vehicle; no overpass or bridge so nothing from above; it was a mild sunny day of 76 degrees so not a weather factor; and by the angle of the glass that remains being in an outward position rather than inward, reveals to me that it was from inside out, not from outside in as if it were a rock hitting. It just exploded. I was the only person in the car. Thankfully, the visor was shut on it or the shattered glass would have caused injury and of greater serious concern is just the sudden sound of what sounded like a bomb going off over my head was enough to cause a reaction which easily would result in an accident. It was a terrifying experience! I was lucky no other vehicles were nearby and could react and safely get off the road. I called 911 immediately and reported it. I have read many such claims from other Toyota owners online (see ToyotaNation.com and search by "exploding Sunroof") and even from a technician at my nearby Toyota Collision Center that it just happened to a friend of theirs also. This is not a one time issue. When I took the car to the Collision Center for an estimate and inquired about the damage, they could find no recall on it by Toyota. This is certainly a dangerous and hazardous issue that needs to be addressed asap before someone is seriously hurt or there is a fatality.

ENGINE — Filed 01/03/2024

Coolant leaking into exhaust And engine also vehicle suddenly stops for no reason now engine is completely broken due to the coolant going into the motor oil

ENGINE,FUEL/PROPULSION SYSTEM — Filed 03/23/2024

Dashboard pop up came up saying that the grille shutter is inoperable to visit a dealer. Went online and noticed there were recalls for my Prius year and because emissions is affected I contacted Toyota financial customer service who said to go to a dealer and that they would fix no charge. Went three times to the dealer and they did not want to honor the recall. Charged me $200 to run diagnostics on the vehicle and confirmed that the code that was being recalled matched. They made excuses and in the end did not fix. The pop up appeared March 2024 and since then I now have another pop up appear about the hybrid system overheating due to them not fixing. I went to a local mechanic who said it was the dealers responsibility since there are service bulletins but they do not want to help. The car has stalled out on the freeway almost leaving me to get hit and my fuel has gotten worse.

VEHICLE SPEED CONTROL — Filed 10/16/2023

On 10/16/23 I was turning slowly into a parking spot and my car suddenly accelerated without my pressing the accelerator. I slammed on the break and the car stopped. It was frightening because I could have hit someone or something but luckily the car stopped before that happened. I believe that this was a malfunction of the accelerator. This has not been checked or reported to anyone yet but I will be calling Toyota to have it checked. There have been no warning messages.

ENGINE — Filed 01/28/2023

The contact owns a 2017 Toyota Prius. The contact stated while driving 10 MPH and pulling out of a parking lot, the vehicle lost motive power and made abnormal sounds. Several unknown warning lights were illuminated. The vehicle failed to restart, and was towed to the dealer, where it was diagnosed that the head gasket was blown, causing damage to the engine. The dealer informed the contact that the engine needed to be replaced. The vehicle was not repaired. The vehicle was taken to an independent mechanic, where the same assessment was made. The vehicle was not repaired. The manufacturer was notified of the failure and informed the contact that they could not assist because the vehicle was out of warranty. The failure mileage was approximately 80,000.

VEHICLE SPEED CONTROL,UNKNOWN OR OTHER — Filed 06/05/2021

For the second time (first in 2019) I was seconds and maybe two feet from stopping the car to park when, with my foot on the brake, the car suddenly and without warning lunged forward at what seemed like full throttle. The first "crash" was in my driveway. The force was shocking and took off the front of the car. I insisted Toyota investigate and they ultimately denied any liability. After the car was allegedly repaired, I started noticing another phenomenon: every time I would slow down to brake--approaching an intersection or stop sign, etc.--the car would briefly lunge forward before the brakes engaged to stop the car. I reported this to the dealer 2-3 times and each time I was assured that this was "normal" for a hybrid transitioning from gas to electric at a lower speed. Two weeks ago, with a friend in the car, I was pulling into a parking space, foot on the brake and about to stop, when the same thing occurred: without warning, the car lunged forward, at what seemed like full throttle, and crashed into a low concrete wall. Had it been seconds later, we would have had our seatbelts off and gone into the windshield. There were injuries. FYI, I have a pretty much perfect driving record and log thousands of miles each year. I had ZERO problems with the Prius I owned prior to this one. I will never drive this car again.

SERVICE BRAKES — Filed 11/19/2019

TL* THE CONTACT OWNS A 2017 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE HIS DAUGHTER WAS DRIVING AT APPROXIMATELY 19 MPH AND APPROACHING A TRAFFIC LIGHT, THE BRAKE PEDAL WAS DEPRESSED AND THE TRACTION CONTROL WARNING INDICATOR ILLUMINATED. THE VEHICLE FAILED TO STOP AND THE VEHICLE CRASHED INTO THE VEHICLE IN FRONT. A POLICE REPORT WAS NOT FILED. NO INJURIES WERE REPORTED. THE VEHICLE WAS TOWED TO THE MILLENIUM TOYOTA, 257 N FRANKLIN ST, HEMPSTEAD, NY 11550, BUT WAS NOT DIAGNOSED. THE MANUFACTURER WAS INFORMED OF THE FAILURE AND AN INSPECTOR WAS SENT OUT TO RETRIEVE INFORMATION FROM THE VEHICLE DATA RECORDER. THE CONCLUSION WAS DRIVER ERROR. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 13,000.

VEHICLE SPEED CONTROL,SERVICE BRAKES — Filed 08/28/2019

I HAD AN SUA (SUDDEN UNINTENDED ACCELERATION). I DROVE UP AN INCLINE INTO THE "DRIVEWAY" OF THE HOLIDAY IN IN DOWNTOWN SAN DIEGO, PULLED UP INTO A SMALL CIRCULAR AREA/DRIVEWAY WHERE YOU CAN REGISTER FOR YOUR ROOM OR PICK UP OR DROP OFF PEOPLE. MY FOOT WAS ON THE BRAKE, I WAS STOPPING THE CAR TO PICK UP MY DAUGHTER AND HER BOYFRIEND. AND THE CAR TOOK OFF ON IT'S OWN. I TRIED DESPERATELY TO USE THE BRAKES, BUT THEY WOULDN'T WORK, SO I KEPT DRIVING AROUND THE CIRCULAR DRIVEWAY TO KEEP CONTROL OF THE CAR WHILE I KEPT TRYING TO STOP THE CAR TO NO AVAIL. THE CAR KEPT ACCELERATING AND SCREECHING AROUND THE DRIVEWAY AND THEN I FINALLY LOST CONTROL AND THE CAR HIT A WALL TO MY RIGHT, THEN MOVED A BIT FORWARD AND BUMPED INTO A CURB ON THE LEFT AND FINALLY STOPPED.MY OTHER DAUGHTER WAS IN THE PASSENGER SEAT.WE WERE BOTH TERRIFIED! I CONTACTED TOYOTA AND FROM THE TIME OF THE ACCIDENT (10/28/19) TO THE TIME I WAS ABLE TO TALK WITH A PERSON IN THEIR CLAIMS DEPT OR RATHER RECEIVE AN EMAIL RESPONSE, IT WAS 64 DAYS LATER (10/31/19). AND THAT IS ONLY BECAUSE I CALLED THEM. I TALKED TO SEVERAL CASE MANAGERS ON DIFFERENT DAYS WHO SEEMED UNHELPFUL UNTIL FINALLY ONE OF THEM GOT IN TOUCH WITH THE CLAIMS DEPARTMENT AND TOLD ME THEY WOULD CALL ME. TOYOTA WILL NOT TAKE ANY RESPONSIBILITY FOR THIS AND I AM REALLY UPSET THAT NOW I WILL HAVE AN ACCIDENT ON MY RECORD AND MY INSURANCE WILL INCREASE SIGNIFICANTLY FOR SOMETHING THAT ISN'T EVEN MY FAULT! I AM AN EXCELLENT DRIVER AND HAVE NEVER HAD AN ACCIDENT THAT WAS MY FAULT. I WAS ALERT AND COHERENT AS WAS OBVIOUS TO ALL OF THE PEOPLE I SPOKE TO DIRECTLY AFTER THE ACCIDENT. MY DAUGHTER, IN THE PASSENGER SEAT, WITNESSED ALL OF MY ATTEMPTS TO USE THE BRAKES TO STOP THE CAR.

VEHICLE SPEED CONTROL,SERVICE BRAKES — Filed 10/23/2019

TL* THE CONTACT OWNED A 2017 TOYOTA PRIUS. WHILE THE CONTACT WAS REVERSING THE VEHICLE INTO A PARKING LOT, IT ACCELERATED WITHOUT WARNING. THE CONTACT ATTEMPTED TO DEPRESS THE BRAKE PEDAL, BUT IT FAILED TO ENGAGE AND CAUSED THE VEHICLE TO CRASH INTO A TREE. ALL THE AIR BAGS DEPLOYED. THE CONTACT DID NOT ENGAGE THE EMERGENCY BRAKE. THE CONTACT AND PASSENGER SUSTAINED MINOR INJURIES AND RECEIVED MEDICAL ATTENTION. A POLICE REPORT WAS NOT FILED. THE CONTACT'S INSURANCE COMPANY TOWED THE VEHICLE TO A LOT AND DEEMED IT A TOTAL LOSS. THE DEALER AND MANUFACTURER WERE NOT CONTACTED. THE CAUSE OF THE FAILURES WAS NOT DETERMINED. THE FAILURE MILEAGE WAS APPROXIMATELY 13,850. *LN*JB

AIR BAGS — Filed 01/04/2019

MY VEHICLE WAS REAR-ENDED AND SHOVED INTO A THIRD VEHICLE. WE WERE ON AN INTERSTATE HIGHWAY WITH WET PAVEMENT, AND TRAFFIC WAS SLOWING. WE WERE TRAVELING STRAIGHT. THE AIRBAGS DID NOT DEPLOY, AND MY WIFE, BELTED IN THE FRONT PASSENGER SEAT, WAS TWISTED SIDEWAYS BY THE IMPACT. SHE EXPERIENCED A PELVIC FRACTURE AND AGGRAVATION OF HER ARTHRITIC LEFT HIP JOINT. WE BELIEVE THAT AIRBAG DEPLOYMENT WOULD HAVE PREVENTED THESE INJURIES. I HAVE ATTACHED THREE EVENT DATA FILES AND VEHICLE CONTROL HISTORY FILES. (I CAN'T SEE IF ALL THREE ARE ATTACHED.)

VEHICLE SPEED CONTROL — Filed 08/05/2018

2017 TOYOTA PRIUS. CONSUMER WRITES IN REGARDS TO UNINTENDED ACCELERATION. *LD THE CONSUMER STATED THE VEHICLE ACCELERATED AND THE BRAKES WERE UNRESPONSIVE RESULTING IN A CRASH. THE CONSUMER WAS INJURED AND REQUIRED MEDICAL ATTENTION. *JS *JS

STEERING — Filed 05/21/2019

TL* THE CONTACT OWNED A 2017 TOYOTA PRIUS. WHILE DRIVING 40 MPH, THE STEERING WHEEL BECAME DIFFICULT TO TURN AND THE CONTACT LOST CONTROL. AS A RESULT, THE VEHICLE CRASHED INTO A STORE. THE AIR BAGS DEPLOYED. A POLICE REPORT WAS FILED. THERE WERE NO INJURIES. THE VEHICLE WAS TOWED TO EDMARK TOYOTA (LOCATED AT 15933 N IDAHO CENTER BLVD, NAMPA, ID 83687, (208) 468-8000) WHERE IT WAS BEING DIAGNOSED. THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOTIFIED. THE FAILURE MILEAGE WAS 2,300. THE VIN WAS NOT AVAILABLE.

AIR BAGS,STRUCTURE — Filed 01/04/2019

TAKATA RECALL POSSIBLY. WET PAVEMENT, TRAFFIC SLOWED ON INTERSTATE TO ABOUT 45 MPH, TAILGATING SMALL PICKUP HIT MY REAR CRUMPLE ZONE, SHOVED ME INTO A SMALL SUV THAT CRUSHED MY FRONT CRUMPLE ZONE. AIRBAGS DID NOT DEPLOY. NEITHER MY WIFE (FRONT SEAT PASSENGER) NOR I FELT ANY DISCOMFORT, BUT A FEW DAYS LATER SHE COMPLAINED ABOUT PAIN IN HER WAIST AREA. SHE WAS LATER DETERMINED TO HAVE A FRACTURED PELVIS AND A JOSTLED LEFT HIP JOINT.

STRUCTURE,VEHICLE SPEED CONTROL — Filed 01/19/2019

WE WERE STOPPED AT A TRAFFIC SIGNAL GOING NORTH. WHEN THE LIGHT TURNED GREEN, THE CAR IN FRONT OF US STARTED TO GO AND ALL OF THE SUDDEN, OUR CAR WENT INTO RAPID ACCELERATION. WE COULD NOT STOP THE CAR. IT CRASHED INTO THE CAR IN FRONT OF US. WE TRIED JAMMING ON THE BREAKS AND TURNING OFF THE IGNITION, BUT COULD NOT GET CONTROL. BECAUSE WE WERE HEADING UPHILL, THE CAR FINALLY CAME TO A STOP. WE WERE ON A CITY STREET AT A STOP SIGNAL.

ELECTRICAL SYSTEM,WHEELS,FUEL/PROPULSION SYSTEM — Filed 12/22/2017

WHILE DRIVING ON I-75 THERE SEEMS TO BE A SPARK CAUSED FUEL TO LEAK AND BURN BACK TIRE AND THE TIRE ROLLED OFF THE FREEWAY PUTTING ALL THE FIVE PASSENGERS INTO A HAZARDOUS SITUATION ON THE I-75 FREEWAY. WE SMELLED SMELL OF TIRE AND GAS LEAK. FORTUNATELY, WE WERE ABLE TO PULL OFF THE FREEWAY. IT WAS REPORTED TO TOYOTA AND THEIR DEALERS MULTIPLE TIMES. NO ONE EVEN BOTHERED OR CONCERNED ABOUT THE ISSUE OR SAFETY OF PASSENGERS.

AIR BAGS,WHEELS — Filed 07/14/2018

TL* THE CONTACT OWNS A 2017 TOYOTA PRIUS. WHILE THE BRAKE PEDAL WAS DEPRESSED, THE REAR WHEELS SEIZED. AS A RESULT, THE CONTACT LOST CONTROL OF THE VEHICLE AND CRASHED INTO A DITCH. THE AIR BAGS FAILED TO DEPLOY. A POLICE REPORT WAS FILED. THERE WERE NO INJURIES. THE VEHICLE WAS TOWED TO A BODY SHOP AND THE BODY DAMAGES WERE REPAIRED SO THAT THE VEHICLE COULD BE DRIVEN. THE VEHICLE WAS TAKEN TO KALISPELL TOYOTA (2845 U.S. 93 S, KALISPELL, MT 59901) FOR DIAGNOSTIC TESTING, BUT THE CAUSE OF THE FAILURE WAS UNDETERMINED. THE MANUFACTURER WAS NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 7,000.

UNKNOWN OR OTHER,SERVICE BRAKES — Filed 11/11/2017

I WANT TO CHECK IF THERE IS A ISSUE WITH THE PRE COLLISION AND THE BRAKING ASSISTANCE FEATURES. MY PRIUS PRIME ROLL FORWARD DURING A IDLED STOP AND I DID NOT RECEIVE WARNING AND THE CAR DID NOT ASSIST STOP FEATURE DID NOT ENGAGE.

ELECTRICAL SYSTEM,STRUCTURE,UNKNOWN OR OTHER — Filed 03/22/2017

WE PURCHASED A 2017 TOYOTA PRIUS ON JANUARY 29TH 2017 AND ON MARCH 22ND 2017 THE CAR CAUGHT ON FIRE OUT OF NO WHERE. THE CAR WAS PARKED AND OFF WHEN SMOKE BEGAN TO COME OUT FROM THE AROUND THE SHIFT CHANGER AND THE TOUCH SCREEN AREA. AFTER A FEW SECONDS THE CAR WAS COMPLETELY ON FIRE.