2012 Toyota Sienna Other or unknown Problems
- Complaints
- 28about this part
- Share
- 11%of 247 total for the year
- Median mileage
- 74,000miles
- Trend
- FallingComplaints filed in the last 3 full calendar years are at least 25% lower than in the 3 years before.
NHTSA recorded 28 complaints about the other or unknown of the 2012 Toyota Sienna, 11% of the 247 complaints for this model year. Where a mileage was given, the median is 74,000 miles. 2 of these say a crash was involved and 3 a fire, according to the filers.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“Passenger door - motor lock assembly failure where passenger door will not shut and flies open when driving. Rusting of door components from improper door sealing around door frame. Popping sound when opening motorized passenger door. Fortunately, door was stopped initially when door failure occurred but door flew open after I shut it and drove the vehicle. I then stopped to shut door and door would not close at all.”
NHTSA complaint #10908710, filed 2016-09, 52,600 miles“We first encountered a problem in which the automatic sliding door would not function to open or close automatically but it still worked manually. About a week later the rear latch of the passenger sliding door became stuck in the lock position thus not allowing the door to fully close. I took the vehicle to my mechanic who greased the latch and allowed it to function properly however the door would still only open automatically but would open or close manually just fine. …”
NHTSA complaint #10598023, filed 2014-06, 70,000 miles“Was driving home from running errands, about a 4 mile drive at 35 miles/hr. At a stop light there seemed to be some sort of electrical surge. All the dashboard lights flashed and the vehicle turned off. I was able to put the car in park and restart it. There were no warning lights on after restarting the engine, so I assumed it was a fluke and continued on my way home. A little further down the road at another stop light it happened again. I pulled into my driveway and started to unload my car when I noticed smoke emanating from under the hood. …”
NHTSA complaint #11156461, filed 2018-12, 63,500 miles“This car caught on fire few minutes after some electrical issues- while driving the car with everything looking just fine , the A/C fan fluctuated on and off -car blue tooth also kept disconnected and reconnect for a few seconds then all dashboard lights illuminated on and off few times . After maybe 2 minuets I reached home ,may family got off the car when I noticed smoke coming from the hood . I opened the hood to find a medium size fire coming from the driver side of the engine, I called 911 right away . In less than 10-15 mins most of the car melt from the fire plus the whole garage.”
NHTSA complaint #11128824, filed 2018-09, 65,000 miles“As I have driven on the highway, on three separate occasions, my rear sliding doors have spontaneously opened on their own. After it happened the first time, we turned off the automatic door feature and it still happened another two times. When we took it into the dealership we were informed that this was a known issue with 2007-2011 Toyota Sienna's but that Toyota has not acknowledged an issue yet with 2012 Sienna's . We were also told it would cost over $5000 for a partial fix. When I called Toyota corporation their response was what do you want us to do about it?”
NHTSA complaint #10840430, filed 2016-03, 119,500 milesRelated service bulletins
- 11028712Jan 7, 2026Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate…
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 11 | 9% |
| 2021 | 29 | 18% |
| 2020 | 6 | 16% |
| 2019 | 9 | 20% |
| 2018 | 14 | 19% |
| 2017 | 27 | 17% |
| 2016 | 14 | 18% |
| 2015 | 48 | 21% |
| 2014 | 28 | 17% |
| 2013 | 33 | 18% |
| 2012 | 28 | 11% |
| 2011 | 64 | 10% |
| 2010 | 27 | 16% |
| 2009 | 37 | 18% |
| 2008 | 38 | 9% |
| 2007 | 34 | 9% |
| 2006 | 59 | 6% |
| 2005 | 58 | 5% |
| 2004 | 107 | 5% |
| 2003 | 2 | 2% |
| 2002 | 3 | 2% |
| 2001 | 8 | 4% |
| 2000 | 13 | 4% |
| 1999 | 16 | 7% |
| 1998 | 6 | 2% |
Other parts of the 2012 Toyota Sienna
84 complaintsBody and structure
72 complaintsElectrical system
27 complaintsTransmission and drivetrain
17 complaintsSteering
15 complaintsWheels
12 complaintsBrakes
11 complaintsVehicle speed control
11 complaintsEngine
9 complaintsTires
8 complaintsVisibility (wipers, defrost, mirrors)
8 complaintsFuel system
5 complaints
← All problems reported for the 2012 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology