Owner-reported complaints naming the driver-assistance system, filed with NHTSA
Data refreshed
Driver assistance reportsComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
9
Latest Apr 2, 2025
Share of all reportsThis category as a share of every owner report on file for this model year. One report can name more than one component, so the categories overlap.
4%
of 229 total
Crash or fire reportedReports in this category whose submitter recorded that a crash or a fire occurred. The reporter's own answer on the NHTSA form, not a verified finding.
1
Injuries or deaths reportedTotals the submitters entered on their own reports in this category. Not verified by NHTSA and not a casualty statistic.
3
What this page shows
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems. Every record below is an owner-reported complaint about the 2015 Toyota Sienna submitted to NHTSA — not a confirmed defect, not a recall and not a manufacturer bulletin. 9 reports on file name it.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Owner reports naming driver-assistance
Shown in the owner’s own words, exactly as filed
BrakesDriver assistanceElectrical
Filed Apr 2, 2025
I have had this car for 7 years. Started having issues a year ago and despite bringing it to Toyota 2x, they cannot tell me what the issue is. I will be driving on a regular flat paved road when the car will suddenly brake and pull me towards the side of the road. I get the ABS code sometimes and also the slip indicator light. I've explained this each x I've brought it in and they have told me it's due to me "driving too fast" or "accidentally having my foot on the brake." LOL I am a typical soccer mom and drive conservatively and don't brake when I don't have to. It will do it on curving roads as well as straight roads. When this happens, it is terrifying! I have gone to different mechanics as well and no one can determine this issue. I've replaced the ABS sensors on this and am still having this issue. I don't know what else to do, as this is unsafe and unsafe to the extent that I no longer allow my 17 year old to drive it. Please help!!!!!!!!
NHTSA ID
11652418
Incident
Apr 2, 2025
Driver assistance
Filed Jul 24, 2022
I was at a stop light when I slowly started to lift my foot from the brake pedal. The engine started revving up and accelerate. I pressed the brake pedal normal , then harder when it would not stop revving. I looked down to see if I was hitting the gas pedal by accident. I was not, about after 5 seconds it stop revving. I went about a foot and nobody was in front of me. I going to have it checked out by my dealer. This happened before and I thought it was driver error .When I thought I was hitting the gas pedal and brake pedal. I searched for incidents like mine, but could not find something exactly just similar. I did not look at the dashboard so i do not know if there was a message . So I'm reporting this incident to get answers and alert others of this issue.
NHTSA ID
11475590
Incident
Jul 22, 2022
Driver assistanceEnginePowertrain (other)
Filed Mar 5, 2020
MY SIENNA VAN SOMETIMES RESPONDS VERY LATE TO ACCELERATION. THIS BECOMES A PROBLEM ON HIGHWAYS SPECIFICALLY DURING THE MERGING. ACCELERATION PADDLE HAS TO BE PRESSED VERY HARD, FOR FIRST FEW SECONDS THERE IS NO RESPONSE FROM ENGINE THEN LATTER IT SUDDENLY ACCELERATES. THIS MAKES YOU MISS JUDGE THE TIME REQUIRED TO MERGE ON HIGHWAYS AND CAN CAUSE ACCIDENTS. THIS HAS BEEN HAPPENING SINCE FEW MONTHS. I AM PROVIDING TENTATIVE DATE BELOW.
NHTSA ID
11316319
Incident
Oct 9, 2019
Mileage
48,000 mi
BrakesDriver assistanceElectrical
Filed Dec 16, 2019
DRIVING 35-55 MPH AND GOING AROUND (USUALLY) A LEFT CURVE ON THE HIGHWAY OR INTERSTATE, VAN SUDDENLY BRAKES, SWERVES, AND TRACTION CONTROL/VEHICLE STABILITY CONTROL LIGHT POPS ON. WHOLE EPISODE LASTS A SECOND OR TWO, THEN ITS FINE. IT WONT HAPPEN AGAIN FOR THE DURATION OF THE TRIP. I ONLY DRIVE THE VAN ON WEEKENDS, AND IT HAS HAPPENED THREE TIMES IN THE PAST TWO WEEKS. IT HAS NEARLY CAUSED A SERIOUS ACCIDENT.
NHTSA ID
11289262
Incident
Dec 14, 2019
Mileage
43,000 mi
Driver assistance
Filed Aug 15, 2019
2015 TS INITIAL EXPERIENCE WAS ABS SYSTEM AND TRACTION CONTROL MALFUNCTION EXPERIENCED TWICE. THIS WAS A SCARY EXPERIENCE DRIVING ON THE HIGHWAY WITH ERROR SIGNAL ON THE DASHBOARD.
NHTSA ID
11244310
Incident
May 20, 2019
Driver assistance
Filed May 17, 2019
WHILE DRIVING IN THE MOUNTAINS AND CURVING RIGHT, THE STABILITY CONTROL ACTIVATED THE BRAKES. THE CAR WAS NOT SPEEDING AND THE ROADS WERE DRY. IT HAPPENED 3 TIMES IN ONE TRIP. THE BRAKING ACTION MADE IT DIFFICULT TO COMPLETE THE TURN. PLUS THE DECREASE IN SPEED WAS A DANGER TO THE OCCUPANTS PLUS THE CAR BEHIND US. OTHER CURVES DID NOT ACTIVATE THE STABILITY CONTROL SO IT WAS A GUESS AS TO WHEN AND IF THIS WOULD HAPPEN. DID MAKE IT BACK SAFELY.
NHTSA ID
11208249
Incident
May 12, 2019
Mileage
25,550 mi
BrakesDriver assistance
Filed Nov 27, 2018
THE VEHICLE WAS STATIONARY AND ONE DAY ABS MALFUNCTION LIGHT CAME ON DUE TO FAULTY HARNESS ON A 3 YEAR OLD 35,000 MILE VEHICLE. THIS REDUCES THE ABILITY OF THE VEHICLE TO STOP NORMALLY AS IT SHOULD THIS ALSO DISABLES THE TRACTION CONTROL ON THE VEHICLE. I WAS DRIVING IN RAIN WITHOUT ANY TRACTION CONTROL AND IT WAS SCARY. I CONTACTED TOYOTA AND THEY KEEP STATING THE CAR IS OUT OF WARRANTY. IT IS $500+ REPAIR TO ABS SYSTEM DUE TO THEIR FAULTY PARTS. I JUST NEED THIS TO BE ON THE RECORD INCASE SOMETHING HAPPENS WHILE DRIVING A TOYOTA SIENNA.
NHTSA ID
11154193
Incident
Nov 16, 2018
Mileage
35,156 mi
Driver assistance
Filed Jun 26, 2018
Crash reported3 injuries reported
TL* THE CONTACT OWNED A 2015 TOYOTA SIENNA. THE CONTACT STATED THAT THE CRUISE CONTROL FAILED TO DEACTIVATE WHEN THE BRAKE PEDAL WAS DEPRESSED. AS A RESULT, THE VEHICLE WAS INVOLVED IN A FRONT IMPACT COLLISION. THE AIR BAGS DEPLOYED. THE CONTACT SUSTAINED A SEVERE HEAD INJURY, THE FRONT SEAT PASSENGER SUSTAINED A BROKEN NOSE AND CRACKED RIBS, AND THE REAR SEAT PASSENGER SUSTAINED MINOR INJURIES. MEDICAL ATTENTION WAS REQUIRED. A POLICE REPORT WAS FILED. THE VEHICLE WAS DESTROYED AND TOWED TO A SALVAGE YARD. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 13,000. THE VIN WAS NOT PROVIDED.
NHTSA ID
11104018
Incident
Sep 12, 2017
Mileage
13,000 mi
Driver assistanceOther / unspecifiedSteering
Filed Nov 13, 2017
I HAVE A BRAND NEW TOYOTA SIENNA AND THE TIRES SEEM TO START SHOWING SIGN OF WEARING OFF IN 6 MONTHS, AS IF IT HAS ALIGNMENT ISSUES OR SOMETHING. THE CAR DOES NOT PULL TO ONE SIDE OR ANYTHING. THE DEALERSHIP TOLD ME THAT IT COULD BE THE TIRE PRESSURE THAT NEEDS TO BE KEPT UP AND THEY SAID THAT THE TIRE PRESSURE INDICATOR IS NOT GOOD ENOUGH TO MAKE SURE IF THE PRESSURE IS GOOD? ALSO THEY TOLD ME THAT THE TIRES THESE DAYS ARE SOFTER SO THEY DON'T LAST AS LONG? THIS ALL SEEMS A LITTLE HARD FOR ME TO BELIEVE. OEM TIRE WARRANTY UP TO 60K BUT NOT LAST LONG . JUST CHANGE NEW SETS OF TIRE WITH ALIGNMENT . TOYOTA ENGINEERING NEEDS TO ADDRESS THIS ISSUE
NHTSA ID
11045856
Incident
Nov 1, 2017
Mileage
39,000 mi
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Other components reported on this vehicle
Categories with enough reports to have a page of their own