Problems · NHTSA complaints

2015 Toyota Sienna problems

Owners filed 233 complaints about the 2015 Toyota Sienna with NHTSA between Apr 2015 and Oct 2026. The most-cited component is structure (61).

Complaints
233
Filed with NHTSA
Crashes
17
Reported by owners
Fires
7
Reported by owners
Injuries
28
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Structure61
  2. Electrical system44
  3. Engine16
  4. Service brakes16
  5. Wheels14
  6. Power train12
  7. Steering11
  8. Air bags9
  9. Seat belts8
  10. Suspension8
  11. Fuel/propulsion system7
  12. Exterior lighting6
  13. Latches/locks/linkages5
  14. Visibility/wiper5

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 3, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
201511
201619
201773
201829
201931
202013
202112
20223
20238
20247
202510
202617

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Structure

61 reports3 related recalls
“This is the 2nd Occurrence where Sliding Door Cable Breaks and the doors are disabled where you can not open or close the sliding door and its jammed shut. Attempts to press the Power Sliding door buttons do not work. This is the 2nd Occurrence on this Vehicle. The First occurrence happened approximately 3 years ago with the Driver Sliding Door and was report to Holman Toyota , 1301 NJ 73, Mt. Laurel township, NJ 08054. Now the passenger sliding door cable is broken and the door is jammed shut also”
Owner complaint to NHTSAFiled Sep 20, 2026StructureODI 11765673

Electrical system

44 reports1 crash4 fires
“Odometer Fraud. The contact purchased a 2015 Toyota Sienna. The vehicle was a private sale. The contact stated that at the time of purchase, the mileage was 92,862. The contact later purchased a Carfax Report which indicated that the last odometer report in 2024 showed that the mileage was 205,000. The seller was made aware of the mileage discrepancy.”
Owner complaint to NHTSAFiled Apr 7, 2026Electrical systemODI 11729714

Engine

16 reports4 fires
“Component Failed & Availability: The engine on my 2015 Toyota Sienna (99,000 miles) catastrophically failed and is completely seized. The vehicle and engine are in my possession and are fully available for physical inspection. Safety Risk: The vehicle shut down completely while in motion, causing an immediate loss of motive power, power steering, and power braking assistance. Had this un-warned seizure occurred at highway speeds rather than a parking lot, the sudden loss of vehicle control would have posed a severe crash hazard. Reproduced/Confirmed: Yes. A certified mechanic removed the serpentine belt, attempted to turn the engine with a lock bar, and confirmed the engine block is completely seized. The local dealership, Fred Haas ToyotaWorld, also confirmed the vehicle does not run. Inspections: The vehicle was inspected by my independent mechanic and the local dealership. However, Toyota Corporate formally refused my request to dispatch a field engineer to inspect the defective engine. Prior Warnings: There were absolutely no warning lamps, check engine lights, temperature spikes, or abnormal noises prior to the failure. The engine seized instantly and without warning.”
Owner complaint to NHTSAFiled Aug 26, 2026EngineODI 11759826

Service brakes

16 reports1 crash
“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!!!!!!!!”
Owner complaint to NHTSAFiled Apr 2, 2025Electrical system, Service brakes, Forward collision avoidanceODI 11652418

Wheels

14 reports
“The front tires are wearing out to an unsafe tread in under 15000 miles due to the suspension in the front of this vehicle. If people are not vigilant the tires become unsafe quickly due to poor engineering on the front end.”
Owner complaint to NHTSAFiled May 1, 2024Suspension, WheelsODI 11586260

Power train

12 reports2 crashes
“On April 15, 2026 Report filed with NHTSA from an accident-causing property damage due to a failure in the shifter mechanism while the vehicle was parked, ignition off, no keys in the vehicle and the brake pedal was NOT pressed. Manufacture initiated an investigation after we contacted their customer care line. Our vehicle was taken to a Toyota dealership on March 11, 2026. We received an email on April 13, 2026 stating Toyota's inspection did not identify any evidence that this incident was a result of a concern with the operation of our vehicles gear shift lever. We retrieved our vehicle from the dealership on April 20, 2026. On April 21, 2026 From our driveway the shift lever fell out of park into drive with the ignition off, no keys, and the brake pedal not pressed. Toyota claims no responsibility! How is this possible when they know there are active recalls for the same issue on earlier models? This is a massive public safety risk considering the vehicle can rollaway without the ignition even being on! I will continue to report this issue every time the shift lever falls out of park until resolved.”
Owner complaint to NHTSAFiled Apr 22, 2026Power trainODI 11733159
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 3, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.