2021 Toyota Sienna vehicle speed control problems
10 owner complaints filed with NHTSA name the vehicle speed control on the 2021 Toyota Sienna — 6% of all complaints for this model year.
What owners report
“Sometimes when each of us 2 are slowing to a stop while applying the brake, the Sienna will lunge forward. This unexpected event may cause a rear-end collision if too close. Also, it is enough to cause us to hit our head on the head rest. Can’t understand why this happening. We are sure we only…”
filed Jun 6, 2024
“When my car is going down a steep hill and I have the brake applied, Suddenly the car will speed up and lurch forward instead of continuing to slow down. This is not how cars normally behave in the 30 years I have been driving. I could have slammed into the car in front of me. This has happened…”
filed Apr 25, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Vehicle Speed Control problems in other Sienna years
| Year | Reports | Share |
|---|---|---|
| 2022 Sienna | 7 | 6% |
| 2019 Sienna | 3 | 7% |
| 2018 Sienna | 5 | 7% |
| 2017 Sienna | 6 | 4% |
| 2016 Sienna | 2 | 3% |
| 2015 Sienna | 3 | 1% |
| 2014 Sienna | 11 | 7% |
| 2013 Sienna | 6 | 3% |
| 2012 Sienna | 11 | 4% |
| 2011 Sienna | 20 | 3% |
| 2010 Sienna | 19 | 11% |
| 2009 Sienna | 13 | 6% |
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.