2021 Toyota Sienna seats problems
17 owner complaints filed with NHTSA name the seats on the 2021 Toyota Sienna — 10% of all complaints for this model year.
What owners report
“I purchased a 2021 Toyota Sienna from United Access Mobility in Sacramento. The vehicle was sold and delivered with multiple serious pre-existing safety defects. The exhaust system was unsafe. The catalytic converter had been stolen prior to sale and replaced with a non-OEM catalytic converter that…”
filed Jan 18, 2026
“2nd row passenger seat recline does not work. My seat is very reclined now causing the 2nd row passenger to not be in the optimal position for SRS airbag performance that may result in possible death due to head impact during a side collision. Toyota likely has enough data to issue a TSB to resolve…”
filed Sep 17, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Seats problems in other Sienna years
| Year | Reports | Share |
|---|---|---|
| 2022 Sienna | 9 | 8% |
| 2020 Sienna | 1 | 3% |
| 2018 Sienna | 4 | 6% |
| 2017 Sienna | 2 | 1% |
| 2016 Sienna | 2 | 3% |
| 2015 Sienna | 3 | 1% |
| 2014 Sienna | 2 | 1% |
| 2013 Sienna | 3 | 2% |
| 2012 Sienna | 3 | 1% |
| 2011 Sienna | 11 | 2% |
| 2010 Sienna | 2 | 1% |
| 2009 Sienna | 2 | 1% |
Other reported problem areas on the 2021 Toyota Sienna
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.