2015 Toyota Prius Problems

Code DTC C1391 - Abnormal leak of accumulator pressure. Internal failure of the brake booster pump assembly, preventing the system from maintaining proper hydraulic pressure. This means the brakes don't work, putting the driver's and passengers' lives at risk. This DTC C1391 code and problem were reproduced and confirmed by an independent service center who specializes in 3rd generation priuses. There were warning lights that lit up when the brakes failed - the ABS, traction control, and brake light all lit up but only after the brakes had stopped working. This is a known manufacturer defect but toyota won't pay to fix it because they put a 10 year limit on first driven date or 150,000 miles. This prius only has 100k miles but toyota still won't stand behind their product even though they have admitted it was a manufacturing defect and they sold a defective product.

The vehicle experienced a failure in the braking system involving the brake booster/brake actuator assembly. The vehicle displayed diagnostic trouble code C1391, which is associated with a malfunction of the brake booster pump/accumulator system on this model. The failed component is available for inspection upon request. The failure created a safety concern because the braking system warning lights illuminated and the vehicle’s brake assist system may not function properly. A malfunction of the brake actuator/booster system could increase stopping distance, reduce braking performance, and create a potential risk of a crash, especially during emergency braking situations. The problem has been confirmed through diagnosis showing the C1391 trouble code. The issue has been identified as a brake system malfunction requiring repair of the brake booster/actuator assembly. The vehicle has been inspected/diagnosed by a service professional. The vehicle has not been inspected by police or insurance representatives. Toyota/dealer inspection information is available if requested. I contacted Toyota regarding the issue, but they declined assistance because the extended warranty coverage expired approximately 7 months prior to the failure. Before the failure, the vehicle operated normally. The first symptoms occurred when multiple warning lights appeared while driving, including the ABS warning light, brake warning light, parking brake warning light (even though the parking brake was not engaged), and the traction control/slippery road warning light. These warning lights appeared suddenly, indicating a problem with the braking system.

Pulling out of a parking stall, when put vehicle in drive, the engine revved up and accelerated - vehicle crashed, the brakes did not work- there was skid marks. Floor mats are factory OEM were installed properly. I did not hit the accelerator and I am in good health and mind. I have driving for over 30 years, never had and accident nor a ticket! - A county officer was at the seen and left me with vehicle that had to be towed away. The Vehicle is a total loss. I have insurance but felt that this incident need to be reported, There is no safety recalls and the vehicle was always property maintained

The incident involved having to press extremely hard on the brake pedal to stop the car, while it was uphill in the middle of the road. The car started going backward and was throwing ABS, Master Warning Light, Brake System Warning Light and Warning Buzzer, Brake System Warning Light, and SLIP Indicator signals. This was a highly distraughtful situation on the road. Diagnostics showed C1391 Diagnostic Trouble Code on the 2015 Toyota Prius: brake booster and brake booster pump problem. When pressing the brake pedal there is a high pitched metal scraping noise. Toyota coverage program is only applicable for 10 years from the date of first use or 150,000 miles, whichever occurs first. Many cars run well for over 10 years with good care, so the 10 year cap barely covers anything. This is highly unfair and borderline scamming for an issue so severe, which can cause big accidents on the road. In all honesty, this is a life or death situation when it comes to not being able to properly brake while driving. This should be a full recall!!

Code DTC C1391 - Abnormal leak of accumulator pressure. Internal failure of the brake booster pump assembly, preventing the system from maintaining proper hydraulic pressure. This means the brakes don't work, putting the driver's and passengers' lives at risk. This DTC C1391 code and problem were reproduced and confirmed by an independent service center who specializes in 3rd generation priuses. There were warning lights that lit up when the brakes failed - the ABS, traction control, and brake light all lit up but only after the brakes had stopped working. This is a known manufacturer defect but toyota won't pay to fix it because they put a 10 year limit on first driven date or 150,000 miles. This prius only has 100k miles but toyota still won't stand behind their product even though they have admitted it was a manufacturing defect and they sold a defective product.

Code C1391 200k miles All the warning signs for brake booster issue came up. The cost is too high and I just missed the Customer Support Program timelines because the code came up late. This needs to be a RECALL, based on how many people experience this issue consistently.

My mom was involved in an accident in her 2015 Toyota Prius on April 19, 2022, which she advised lurched forward at a stop and when applying the brakes to stop the vehicle, she said was unresponsive, causing her to clip a vehicle and sending her vehicle into a ditch totaling her car and injuring her passenger and her. I would like to have this investigated and hold Toyota responsible. This could have been much worse and lives could have been lost. She is now without means of transportation, and she is now possibly responsible for damages to property and bodily injury because of this. Through my research I have discovered multiple class action lawsuits brought against Toyota for the same exact models. I asked the police officer to run a scan on the computer, but he advised it was only for serious accidents. There was no indication of the problem or messages.

When I looked up my car on Kelly Blue Book for pricing, it said that it has been recalled as of 2020. I was not aware of this at all and could have got into a serious accident. I recently purchased a 2015 Toyota Prius Hybrid in February and not even my saleswoman told me that it has been recalled. It has a sleuth of issues that came with it.

Pulling out of a parking stall, when put vehicle in drive, the engine revved up and accelerated - vehicle crashed, the brakes did not work- there was skid marks. Floor mats are factory OEM were installed properly. I did not hit the accelerator and I am in good health and mind. I have driving for over 30 years, never had and accident nor a ticket! - A county officer was at the seen and left me with vehicle that had to be towed away. The Vehicle is a total loss. I have insurance but felt that this incident need to be reported, There is no safety recalls and the vehicle was always property maintained

I was driving from Las Vegas to my home in Los Angeles. An alarming message began flashing on the dashboard telling me to pull over. The vehicle became hard to control. I somehow managed to get it off an exit. I was "lucky" enough to get it towed to a nearby Toyota dealership where I was told the inverter had failed and that that inverter and associated parts had to be replaced. On my 2015 Prius with only 50,000 miles on it. I SPECIFICALLY asked if there had been a recall on the electrical system of any 2015 Priuses, and they flatly said no. I also CALLED TOYOTA, and they also said there were no recalls involving the electrical system or inverters. The Barstow Toyota dealership said it would cost over $5,000 to repair AND that they wouldn't have the parts they needed for a WEEK. As it was, I had been stranded in the desert at a hotel for two days. I then had to pay $1,100 to be towed back to LA and took it to a hybrid mechanic I trust and paid them to do the work. But this cost me THOUSANDS UPON THOUSANDS. In a month where a friend of mine died (which was the reason I was driving from city to city). To have to replace this on a car with only 50,000 miles is preposterous. To NOW find out there actually IS a recall on the 2015 Prius FOR the electrical system involving the inverter is so far beyond frustrating, I don't have the correct word for it.

The headlight bulbs keep going out. I have replaced the bulbs at least 2-3 times a year for the past few years. I have asked dealers about this and they tell me there is no recall or tsb. This is a hazard to night driving because of decreased illumination, especially in dark roads with not enough lighting. Please recall/fix this issue!!

My vehicle has an ongoing issue with the headlights not being bright enough to drive at night with. I have replaced the headlights more than 5 times now over the course of a year, each time with different brands including Toyota OEM headlights. Each time, they are still not sufficiently bright enough to see with at night. This has led to 3 collisions with curbs and objects which caused damage to my vehicle, because I could not see the objects while having to drive at night. I have brought the issue up to Toyota and they said they would not do anything about it. I brought it in for service to Toyota and they tried to charge me $200 to even look at it, money which I do not have. I am forced to continue driving at night for work and fear I will get into a more serious crash or hit a pedestrian as the headlights aren't bright enough to see safely at night. The photo I have included shows a gash in the tire and dent in the rim where it hit the curb. The issue seems to be the headlight wiring or connectors. When I replace the headlight bulbs, they are a bit brighter initially. Thus initial brightness only lasts about a week, and it's still not sufficiently bright to drive safely. They then dim even further to the point where it's like driving without headlights at all. Again this has led to 3 collisions at this point since I'm required to drive at night and don't have the money to fix it. Toyota refused a good faith repair and did not acknowledge there was an issue, however if you do a web search for "Prius headlights too dim" it seems to be a major issue with many other Prius owners. It should be noted that even the high beam headlights are not bright enough to sufficiently see with at night.

Airbags didn’t deploy in a front end collision that totaled the car. The driver hit their forehead on the steering wheel. Driver had bruising from the seatbelt. There were no warning lights or indications of any issues.

Driving making slight turn car locked up steering wheel, brakes and gas all locked up ran in to a wall. The vehicle just failed with no prior warning.

The factory clear coat has delaminated

ON FEBRUARY 28, 2018 AT 10:00 A.M. I WAS DRIVING ON I-10 W ABOUT 10 MILES OUTSIDE OF NEW ORLEANS WHEN MY CLOSED, LOCKED SUNROOF EXPLODED UPWARDS, SHATTERING COMPLETELY THE CENTER SUNROOF PANEL AND SHOWERING ME WITH GLASS. IT WAS A CLEAR SUNNY DAY, ABOUT 70 DEGREES, THE ROAD WAS CLEAR WITH NO TRAFFIC OR DEBRIS AND I WAS TRAVELING AT APPROXIMATELY 65 MPH.

I am having a hybrid propulsion system issue due to a part that was recalled according to this ID number for the NHTSA 17V718000 that was posted NOV 14, 2017 and my car does seem to be affected because it is facing the same issues as other cars reported from that batch. I want to make sure that I can have it serviced properly at my dealership

My mom was involved in an accident in her 2015 Toyota Prius on April 19, 2022, which she advised lurched forward at a stop and when applying the brakes to stop the vehicle, she said was unresponsive, causing her to clip a vehicle and sending her vehicle into a ditch totaling her car and injuring her passenger and her. I would like to have this investigated and hold Toyota responsible. This could have been much worse and lives could have been lost. She is now without means of transportation, and she is now possibly responsible for damages to property and bodily injury because of this. Through my research I have discovered multiple class action lawsuits brought against Toyota for the same exact models. I asked the police officer to run a scan on the computer, but he advised it was only for serious accidents. There was no indication of the problem or messages.

The contact owns a 2015 Toyota Prius. The contact stated while driving at various speeds, the brake, check engine, and ABS warning lights illuminated. The "Check Hybrid System - Stop Vehicle in A Safe Place" messages were displayed. The vehicle was taken to an unknown dealer where an unknown repair was completed; however, the failure recurred while driving. Additionally, the contact stated that while driving 25-45 MPH, the vehicle stalled. The contact was unable to restart the vehicle after several attempts. The vehicle was towed to the dealer who informed the contact that they could not duplicate the failure. The failure persisted. The vehicle was towed to the contact's residence. The contact became aware of NHTSA Campaign Number: 20V369000 (Hybrid Propulsion System). The manufacturer was notified of the failure and informed the contact that they could not assist. The vehicle was not diagnosed or repaired. The failure mileage was approximately 29,407.

The contact owns a 2015 Toyota Prius. The contact stated while attempting to start the vehicle, there were several unknown warning lights illuminated. Additionally, the Hybrid System failure message was displayed on the instrument panel. The vehicle was not drivable. The contact towed the vehicle to the local dealer, where it was diagnosed with needing the inverter to be replaced. The vehicle was not repaired but was pending the repair. Upon investigation, the contact associated the failure with NHTSA Campaign Number: 20V369000 (Hybrid Propulsion System) however, the Vin was not included. The manufacturer had not been informed of the failure. The failure mileage was approximately 110,000.

WHILE DRIVING ON THE FREEWAY, THE SUNROOF GLASS EXPLODED. FORTUNATELY, WE WERE NOT INJURED SINCE THE SUNROOF WAS CLOSED. I NOTED THAT THERE WERE MANY SIMILAR REPORTS. SURPRISED THIS WAS NOT A RECALL ACTION.

I WAS ON THE INTERSTATE GOING 70 MILES AN HOUR IN THE LEFT LANE. I WANTED TO CHANGE TO THE RIGHT LANE, PUT ON MY TURN SIGNAL, CHECKED BOTH MIRRORS, AND STARTED TO PULL OVER WHEN A HORN BLEW, I DID NOT SEE A CAR IN THE RIGHT LANE AS THE PRIUS HAS A TERRIBLE BLIND SPOT. THIS HAS HAPPENED A FEW TIMES. NOT GOOD I MISSED HITTING THE VEHICLE BE MERE INCHES.

I WAS DRIVING DOWN THE ROAD AND THE TIRE BLEW OUT CAUSING ME TO HIT THE CENTER DIVIDER ON THE 101 ON THE DRIVER SIDE FRONT TIRE WHICH CAUSED THE CARS ASS END TO ALSO GET SCUFFED UP AS WILL

I BACKED OUT OF A CARPORT AND PLACED MY CAR IN ACCELERATION AND IT PICKED UP SPEED AND THEN HIT A WALL AT AN APARTMENT COMPLEX.

I WAS DRIVING DOWN THE ROAD AND THE TIRE BLEW OUT CAUSING ME TO HIT THE CENTER DIVIDER ON THE 101 ON THE DRIVER SIDE FRONT TIRE WHICH CAUSED THE CARS ASS END TO ALSO GET SCUFFED UP AS WILL

I WAS INCHING INTO A GROCERY STORE PARKING SPOT IN MY NEW, PERFECTLY MAINTAINED 2015 TOYOTA PRIUS WHEN I EXPERIENCED UNINTENDED ACCELERATION. MY VEHICLE SHOT FORWARD AND IN A SECOND HAD CRASHED OVER A CEMENT CURB, THROUGH A FLOWER BED, AND WAS STOPPED - DESPITE MY DESPERATELY JAMMING THE BRAKE - ONLY BY SMASHING INTO A BRICK WALL. THE SUSPENSION AND STEERING ON THE CAR IS NOW SEVERELY DAMAGED, AND THE CAR CANNOT BE DRIVEN. I AM HORRIFIED: I COULD HAVE BEEN SERIOUSLY INJURED AND WORSE, HIT/HURT ANOTHER PERSON (OR AT THE VERY LEAST SEVERELY DAMAGED PROPERTY). WHAT IF I HAD CHOSEN A PARKING SPOT IN FRONT OF A GROUP OF CHILDREN?!! THEY CLOUD HAVE BEEN KILLED! THE CAR IS NOW AT A TOYOTA SERVICE CENTER WAITING FOR TOYOTA CORPORATE TO "DECIDE" IF A CAR ACCELERATING INTO A BRICK WALL OF ITS ACCORD IS A "DESIGN FLAW" THAT IT WILL PAY TO FIX. I BELIEVE THAT WHAT MAY HAVE HAPPENED IS THAT THE COMPUTER SYSTEM THAT CONTROLS THE THROTTLE/ACCELERATION EXPERIENCED A SOFTWARE BUG WHICH THREW THE CAR FORWARD. IN FACT, TOYOTA WAS FORCED PAY OUT OVER ONE BILLION DOLLARS IN FINES LAST YEAR (2014) BY THE US GOVERNMENT FOR THIS EXACT ISSUE - BUT APPARENTLY IT DIDN'T FIX ITS 2015 LINE B/F LETTING IT GO TO MARKET. I PURCHASED THE TOYOTA PRIUS BECAUSE IT WAS RECEIVED TOP SAFETY AND RELIABILITY RATINGS. ONLY NOW DO I LEARN TOYOTA HAS A HISTORY OF HIDING UNINTENDED ACCELERATION BUGS IN ITS CAR DESIGNS FOR YEARS - AND BLAMING OWNERS FOR ITS RECKLESSLY UNSAFE AND THEREBY UNETHICAL AUTO DESIGNS (NO, THIS WASN'T CAUSED BY A STUCK FLOOR MAT). I AM FURIOUS. NO ONE CAN AFFORD TO BE BLAMED FOR VEHICULAR MANSLAUGHTER DUE TO MANUFACTURER NEGLIGENCE. EVEN IF TOYOTA CLAIMS TO HAVE FIXED MY PRIUS, ITS WORD CLEARLY MEANS NOTHING AND I DO NOT TRUST THE COMPANY. I WILL BE GETTING RID OF THE CAR ASAP AND SEARCHING FOR A SAFER MODEL.

I was rear-ended by a truck in my prius and my seat laid back on impact. I'm unaware if that was an intended thing or not but it potentially could have injured my neck. My car is currently in a storage lot awaiting the adjustor's inspection so it is available for inspection if needed. No warning lights were available and it hasn't been recreated by the dealer

The contact owns a 2015 Toyota Prius. The contact stated that while driving and coming to a complete stop, the vehicle was rear-ended by another vehicle driving approximately 35-45 MPH. The contact stated that upon impact, the front driver's seat unexpectedly reclined and struck the rear passenger’s seat. The contact was concerned about the movement of the seat and stated that an occupant seated directly behind the driver's seat could have been injured. The rear bumper, trunk, and rear body structure sustained damage from the crash. The contact stated that the force of the impact caused the rear driver’s side body panels to flare outward and become deformed. No additional property damage had occurred from the crash. The vehicle remained in the roadway following the crash. There was no warning light illuminated. The contact sustained neck injuries, whiplash, and emotional trauma from the crash. Medical attention was sought. The Uber passenger inside the vehicle was also transported from the scene to seek medical attention and treatment; however, the extent of the injury was unknown. The contact considered the vehicle a total loss by the contact, but the vehicle was not declared a total loss. The vehicle was towed to a tow yard. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 205,000.

DRIVING ON THE FREEWAY HOME HEARD A STRANGE NOISE, PULLED OVER TO CHECK AND THOUGHT I HAD BLOWN A TIRE SOMEHOW. WHEN CLOSELY INSPECTING TIRE TREADING THE CENTER OF THE TIRE COMPLETELY CAME OFF IN A PERFECT CIRCLE WHEN DRIVING. TOOK TIRE TO COSTCO WHERE TIRES WERE PURCHASED LESS THAN A YEAR A AGO (8/24/18) WAS INFORMED ITS A MANUFACTURER'S DEFECT. HAD TO PAY FOR A NEW TIRE. IT WAS ALSO DISCOVERED THAT PASSENGER BACK TIRE HAD A WHOLE IN IT WHICH WAS MISSED WHEN I TOOK CAR IN FOR TIRE INSPECTION.

NEWS TIRES WHERE BAD WITHIN 9 MONTHS-BOUGHT AT COSTCO -ONE TIRE HAD A NAIL AND WENT FLAT VERY FAST- -HAD REPAIRED-ONE KEPT GETTING FLAT OTHER EXPLODED ON FREEWAY AND CAUSED DAMAGE -BOTH FLAT AND RIPPED TIRE HAPPENED SUDDENLY. COSTCO HAS REPLACED THE TIRES ALL 4 -BUT WILL NOT PAY DAMAGE TO CAR FROM EXPLOSION SUDDEN FLAT AND IN SHREDS . WE FELL THEY SOLD BAD TIRES AND THESE TIRES ARE A SAFETY HAZARD.

TL* THE CONTACT OWNED A 2015 TOYOTA PRIUS. THE CONTACT STATED THAT WHILE HER HUSBAND WAS DRIVING APPROXIMATELY 55 MPH, ANOTHER VEHICLE REAR-ENDED THE CONTACT'S VEHICLE. AS RESULT THE CONTACT'S VEHICLE ROLLED OVER MULTIPLE TIMES CRASHING INTO A DITCH. THE CONTACT STATED THAT ONLY THE FRONT PASSENGER AIR BAG DEPLOYED. THERE WAS NO WARNING LIGHT ILLUMINATED. A POLICE REPORT WAS FILED. THE FRONT SEAT PASSENGER SUSTAINED FRACTURES TO THE RIGHT ARM, WRIST, PELVIS, RIBS AND STERNUM AS WELL A FEW BUMPS AND BRUISES ON LOWER LEG AND CHIN. THE DRIVER SUSTAINED A CONCUSSION, MULTIPLE FACIAL FRACTURES AND LACERATIONS AND A BROKEN NOSE. THE CONTACT STATED THAT THE SHE BELIEVES THAT THE .DRIVER SIDE SEAT BELT AND HEAD REST FRACTURED AS HER HUSBAND WAS FOUND LAYING UNCONSCIOUS IN THE REAR PASSENGER SEAT FACE DOWN. THE CONTACT AND THE DRIVER WERE TRANSPORTED TO THE HOSPITAL BY AMBULANCE. THE CONTACT WAS UNAWARE OF INJURIES IN THE OTHER VEHICLE. THE VEHICLE WAS TOWED TO TOW LOT AND DEEMED A TOTAL LOSS. THE DEALER AND THE MANUFACTURER WERE NOT CONTACTED. THE FAILURE MILEAGE WAS APPROXIMATELY 70,000. THE VIN WAS NOT PROVIDED.

2015 PRIUS 4 AFTER REAR END COLLISION NOTED PASSENGER AIRBAG 'OFF'- PASSENGER SEATBELT ICON BLINKS - AIRBAG ICON ON DASH LIT CONTINUOUSLY. VEHICLE WAS HIT FROM BEHIND WHEN IN PROCESS OF STOPPING (BREAKING BUT STILL IN MOTION 90 - 50 FT FROM TURN) WAITING FOR LEFT TURN THROUGH ONCOMING TRAFFIC ONTO SIDE ROAD FROM HIGHWAY. BODY SHOP ATTEMPTED TO CLEAR WITH DIAGNOSTIC COMPUTER INTERFACE BUT UNSUCCESSFUL. BODY SHOP SHRUGGED IT OFF FORCING US TO DEAL WITH MFG FOR REPAIRS.