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What 152 owners told NHTSA about the 2017 Toyota Sienna

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (152)Crash / fire / injury (20)Transmission & drivetrain (36)Electrical system (20)Fuel system (17)Wheels (16)Engine (15)Body & structure (13)Brakes (11)Steering (7)Visibility & wipers (7)Speed control (6)

5 of 152 complaints match · Brakes · crash/fire/injury only · clear filters

Sep 6, 2023Transmission & drivetrainBrakesCrash1 injury

Parked the car on an incline (our driveway) like we have a 100 times before. Went inside to unload groceries. Came back to the car and from the passenger seat reached over to press the auto-off button. When that was pressed the car started to roll down our driveway with our daughter in the back seat. It rolled across the street, hit the side of our neighbors house, and landed in the woods. My wife sustained major injuries to her arms, legs, hands, and back. She was also 9 months pregnant. Toyota dealership says there's nothing wrong after a 30 minute inspection.

NHTSA ODI 11542820

Jun 22, 2023BrakesCrash

When going down a parking ramp exit, my foot has slipped off the brake 3 time. When looking at the brake pedal it is smaller than most brake pedals. I don't know if anyone else has had this problem, but mandating a minimal size for brake pedal might help

NHTSA ODI 11528321

Oct 16, 2021Electrical systemBrakesCrash

On October 15, 2021 at 2 pm I drove into the driveway of a friend. I turned to the right of the driveway on her grass so I could backup and face the road. I’ve done this many times in the past. On this day as I put my foot on the break the van accelerated at a very very high speed. The van was out of my control at this point. I do not know how fast because this all happened in seconds. I was heading straight to their privacy wood fence only feet away. Approximately 20 feet. I don’t recall breaking again but turned the wheel to the right trying to avoid the fence. I hit the fence at a high speed damaged the left bumper and scraped the drivers side of the door. The next second I attempt to break again so I could back out of this when the van continued to accelerate at high speed going straight toward the house only a few feet away. I attempted to avoid the house and hit the right bumper hard at a high speed on the corner of the house. At this point the acceleration stopped and I was able to backup and turn the car around and finally turn the car off. There is major damage to the van and some to the fence and house. I was very upset and in shock and some soreness the next day but thankfully no one was hurt. This is a very small yard area that this took place at. I am still in shock and extremely confused as to why this happened. I do know without question my foot was not in the accelerator. The van is presently in the body shop. I would like to mention I have a clean record at the age of 64 I have never had an accident and/or speeding ticket in my life. This truly was not human error. I’m a very experienced driver. If it was human error the van should have stopped at the first point of impact on the fence, but did not. It continued to accelerate at a fast speed after hitting the fence hard. The van paused but continued to accelerate at this point when I hit the break again and it went toward the right straight for their house.

NHTSA ODI 11436985

Nov 27, 2018BrakesCrash

TL* THE CONTACT OWNS A 2017 TOYOTA SIENNA. WHILE DRIVING APPROXIMATELY 40 MPH AND ATTEMPTING TO STOP THE VEHICLE, THE BRAKES FAILED. AS A RESULT, THE VEHICLE REAR ENDED THE PRECEDING VEHICLE. THERE WAS NO WARNING INDICATOR ILLUMINATED. THE AIR BAG DID NOT DEPLOY. A POLICE REPORT WAS FILED. THERE WERE NO INJURIES. THE DEALER AND MANUFACTURER WERE NOT MADE AWARE OF THE FAILURE. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE VEHICLE WAS DAMAGED AND TOWED TO A TOW YARD. THE FAILURE MILEAGE WAS APPROXIMATELY 20,000.

NHTSA ODI 11154285

Mar 30, 2017AirbagsSpeed controlBrakesCrash

OUR 2016 SIENNA WHICH WE PURCHASED LAST MAY ACCELERATED ON IT'S OWN ON 2/16/2017 GOING THROUGH OUR SOUTH OUTSIDE WALL AND MASTER BATHROOM OF OUR HOUSE. MY HUSBAND LEFT THE VAN IN THE DRIVEWAY, UNLOADED THE GROCERIES, THEN GOT BACK INTO THE VAN, STARTED IT, PUT HIS FOOT ON THE BRAKE, SHIFTED TO DRIVE AND WITH HIS FOOT ON THE BRAKE THE VAN ACCELERATED INTO THE THE GARAGE. WE HAVE AN EXTENDED GARAGE WHICH HAD AN OFFICE AREA AND IT PROCEEDED TO PUSH THE OAK DESK THROUGH THE SOUTH EAST OUTSIDE WALL AND MASTER BATH. AS IT CONTINUED TO ACCELERATE AND BURN RUBBER ON OUR FINISHED GARAGE FLOOR, WITH HIS FOOT STILL ON THE BRAKE SLAMMED IT INTO REVERSE. THE SIENNA SHOT OUT OF THE GARAGE, HEADED DOWN OUR DRIVE, INTO OUR LAWN AND OVER OUR WINTER SNOW STAKES. KNOWING IT WAS NOT STOPPING AND THE BRAKES WERE NOT WORKING OTHER THAN LETTING HIM PUT THE CAR INTO GEAR, HE ONCE AGAIN SLAMMED IT INTO DRIVE. THE SIENNA SHOT INTO THE GARAGE A SECOND TIME, HITTING THE S. E. WALL AND YET AGAIN CONTINUED TO BURN RUBBER ON OUR FLOOR AS IT PUSHED THE DESK FURTHER THOUGH THE WALL. ONCE AGAIN, COMPLETELY BESIDE HIMSELF MY HUSBAND SLAMMED IT INTO REVERSE AND WHEN OUTSIDE IT FINALLY STOPPED AFTER HE STOMPED ON THE BREAKS WITH ALL HIS MIGHT! THE AIR BAG DID NOT DEPLOY NOR DID THE BRAKES EVERY BEGIN TO WORK TO SLOW IT DOWN. WE WILL NEVER DRIVE THIS VEHICLE AGAIN AND IT IS BEING STORED AT CARLSON TOYOTA UNTIL WE KNOW WHAT TOYOTA HEADQUARTERS INTENDS TO DO ABOUT THIS PROBLEM. WE ALSO NEED TO KNOW WHAT WE ARE TO DO BEINGS OUR SIENNA WAS PAID FOR AND NOW IT IS WORTHLESS TO US.

NHTSA ODI 10969642

Working with the data? Download all 152 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2017 Toyota Sienna verdict →