2018 Toyota Sienna Seats Problems
- Complaints
- 4about this part
- Share
- 6%of 72 total for the year
- Median mileage
- 12,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the seats of the 2018 Toyota Sienna, 6% of the 72 complaints for this model year. Where a mileage was given, the median is 12,500 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“3rd row power seats are malfunctioning and are operating while vehicle is in motion. Multiple times, and on different days, the power seats have started to close while passenger is seated and buckled in the seat. Occurred today while on the highway, at highway speed while my wife was seated in the drivers side 2 seat split. The seat started to close on its own - no one touched any button and we had been driving for over an hour. The seat put pressure on her until it stopped in a partially closed position. The seat buttons then did not work to reopen the seat back for several minutes. …”
NHTSA complaint #11181710, filed 2019-02, 24,000 miles“The last week of September 2021 my husband notice a sound like water runing and a leak on the driver and passenger seats, we take the vehicle to the Dealer for an inspection on October 2nd. They said the AC hose was clogged for a spiderweb and the leak can create a mold. This mold can affect my family health. We informed to the insurance and we taked the vehicle to the Dealer for repair. They did an expensive special cleaning to Remove the mold, and disamble my entire vehicle, the worse is my vehicle still unassembled after 3 months at the dealership. …”
NHTSA complaint #11448917, filed 2022-01“I have a question regarding vehicle seat movement. I have been told by two dealerships that the seats in the third row of the Toyota Sienna are meant to have some play to them. My main concern is that with a couple of car seats in the third row, or a couple of passengers, the movement of the seats may be an issue. All four seat latches rotate when lifting on the seat by hand, allowing the seat to twist, move to the rear of the vehicle and move laterally. This would be less of a concern if the seats themselves were not the mount for the latch system and seat belts. …”
NHTSA complaint #11150111, filed 2018-11Related service bulletins
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Seats: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 9 | 8% |
| 2021 | 17 | 10% |
| 2020 | 1 | 3% |
| 2018 | 4 | 6% |
| 2017 | 2 | 1% |
| 2016 | 2 | 3% |
| 2015 | 3 | 1% |
| 2014 | 2 | 1% |
| 2013 | 3 | 2% |
| 2012 | 3 | 1% |
| 2011 | 11 | 2% |
| 2010 | 2 | 1% |
| 2009 | 2 | 1% |
| 2008 | 2 | 0% |
| 2007 | 1 | 0% |
| 2006 | 11 | 1% |
| 2005 | 8 | 1% |
| 2004 | 18 | 1% |
| 2003 | 1 | 1% |
| 2002 | 1 | 1% |
| 2001 | 1 | 1% |
| 2000 | 6 | 2% |
| 1999 | 2 | 1% |
| 1998 | 2 | 1% |
Other parts of the 2018 Toyota Sienna
20 complaintsOther or unknown
14 complaintsFuel system
13 complaintsElectrical system
7 complaintsAir bags
5 complaintsEngine
5 complaintsBody and structure
5 complaintsVehicle speed control
5 complaintsBrakes
2 complaintsVisibility (wipers, defrost, mirrors)
2 complaintsEquipment
1 complaintsExterior lighting
1 complaints
← All problems reported for the 2018 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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