Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2015 Toyota Sienna owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2015 Toyota Sienna. The contact stated that the vehicle failed to start after several attempts. The contact stated that she was quadriplegic and was unable to exit the vehicle because the door lock switch was disengaged but failed to respond. There were no warning lights illuminated. The contact stated that she was able to jumpstart the vehicle with assistance. The contact then engaged and disengaged the door lock switch and she was able to exit the vehicle. The contact stated that she notified the modifier of the vehicle, but they said they could not assist with the failure. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed nor repaired. The approximate failure mileage was 48,000. The VIN was not available.
Odometer Fraud. The contact purchased a 2015 Toyota Sienna. The vehicle was purchased from a private seller. The contact stated that while registering the vehicle at the local Department of Motor Vehicles, the contact was informed that the odometer mileage was last recorded at 141,000. The contact later purchased a Carfax report, which indicated the past mileage recorded at 287,000. The contact stated that when the vehicle was purchased on November 8, 2025, the odometer was recorded at 98,043. In addition, the mileage recorded on the title was 97,043, and in parentheses, the words "Not Actual" were handwritten.
We got into an accident today, and none of the sliding doors would not slide open. It would not even allow us to pull the doors opens. The vehicles electrical was damaged, but that should not prevent the other doors from opening. This is a very bad situation if someone is needing to evacuate the vehicle. The rear passengers would be trapped. Please address this issue with Toyota asap. People who usually have Vans have big families and small children. This would be a very bad situation if vehicle needed to be evacuated asap. The rear passengers would be stuck.
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.
All interior dome/lights (door side lights, visor mirror lights, all overhead passenger lights, etc) not lighting up at all. Fuse in engine compartment is good. Vehicle has been at auto dealership where originally purchased. Safety concerns are that at night, unable to determine if there has been access by person or if person is actually in vehicle. Vehicle diagnoses was begun on 6/12/2023 and is still in process of issues. Received a call from the service representative on 6/19/2023 that water had accumulated under the fuse box in the engine compartment causing corrosion at the connection of the wire harness to the underside of the fuse box. Initially this caused the the internal lights to fail. There is much more corrosion occurring which will eventually cause a complete electrical failure and possible engine failure/fire. …
The vehicle rear sliding door had a recall. I had the recall preformed at Smithtown Toyota. After the correction was done. I continue to have same issues with the drivers side rear sliding door. Where it will not open when pushing the open button on my controls in the front. Or when my child 12 years old attempts to manually open the door. As this does not happen all the times. The dealer says they can not replicate the problem and it is working to manufacture standards. I spoke with Toyota corporate and they are aware of continued problems with the sliding rear doors. the have a customer support group, but I would have to pay for the dealer to inspect the vehicle. I have extended warranty so they said I wouldn't then have to pay. However every time you take it in with a problem they can never replicate the problem. They are not the only dealer with this response. …
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. …
While traveling, our 2015 AWD Toyota Sienna with 8K miles caught fire and was a total loss. The vehicle was traveling 45 MPH on rt 102 north in southwest harbor, me by the echo lake national park entrance, when we noticed white/brown smoke in the rear view mirror. We had only been on the road for about 5 minutes. We pulled over and turned the car off. When the car came to a stop, black smoke came into the cabin and everyone evacuated. During the evacuation, we noticed flames coming from the front engine compartment as well as the underside of the vehicle. By the time the southwest harbor police and fire reached us, the vehicle was completely engulfed in flames. The vehicle had been driving well the entire trip. The vehicle had been serviced once at 5K miles. It is unknown exactly what caused the fire. We've filed an insurance claim with arbella insurance. The claim number is 033734081. …
In August 2025, AutoNation Toyota on Sahara, checked the VIN of my Toyota Sienna and contacted Toyota while I was present. Toyota confirmed a broken fuel-door hinge was covered under a Customer Support Program. Instead, AutoNation attempted to repair, rather than replace, the hinge. This caused the metal fuel cap door to end up bent, paint to be gouged out from the bottom of the fuel door area, misalignment of the fuel door, and therefore issues with the door's sensor reading correctly. I took the van back until they received shipment of a new fuel cap door. After the attempted repair, since the fuel door no longer aligned, the safety sensors repeatedly activated which strained the sliding-door ECU. The passenger sliding door began freezing intermittently, forcing my children to exit through the trunk several times. Finally, the door opened on its own as I was driving down the street. …
The dash was randomly freezing for about 5 minutes and then reset itself while driving. Once it reset itself, it went back to the default settings. It was at heart city Toyota multiple times for this problem. Each time they said that they could not get it to duplicate the problem. After dropping it off in April of 2017, the technician stated that he was able to duplicate the problem of the dash resetting. He did a software update and a hard-reset in order to try fixing it. Low and behold, two days later it happened again. After having it at heart city Toyota to have the problem with the cruise control light flickering, for the fifth time, fixed, I reported about the dash still having the problem of resetting itself. The manager of heart city Toyota told me at that point that I am not welcome back to their dealership. …
Electrical complaints in other Sienna years
Frequently asked questions
How common are electrical problems on the 2015 Toyota Sienna?
NHTSA has 44 complaints about the electrical system of the 2015 Toyota Sienna, 19% of the model year's 233 complaints. The component named most often is instrument panel › speedometer/odometer (2 mentions).
Is there a recall for 2015 Toyota Sienna electrical problems?
No. NHTSA lists no electrical system recall for the 2015 Toyota Sienna, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2015 Toyota Sienna electrical problems start?
Half of the complaints with a recorded mileage happened before about 19,000 miles, and 55% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 4 fires and 2 injuries to electrical system problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.