2012 Toyota Sienna electrical system problems
27 owner complaints filed with NHTSA name the electrical system on the 2012 Toyota Sienna — 11% of all complaints for this model year.
What owners report
“Odometer Fraud. The contact purchased a 2012 Toyota Sienna. The contact discovered a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 48,230. It was later discovered that the mileage on the Title was 241,080.”
filed Sep 12, 2025
“The engine stalled, power steering frozen then engine shut off while driving in an intersection. Replaced new battery, dove home upon arrival the engine stalled again, power steering frozen and engine shut off again. I don’t know what’s going on.”
filed Jun 7, 2022
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other Sienna years
| Year | Reports | Share |
|---|---|---|
| 2022 Sienna | 12 | 10% |
| 2021 Sienna | 13 | 8% |
| 2020 Sienna | 6 | 17% |
| 2019 Sienna | 4 | 9% |
| 2018 Sienna | 6 | 9% |
| 2017 Sienna | 20 | 13% |
| 2016 Sienna | 9 | 12% |
| 2015 Sienna | 44 | 19% |
| 2014 Sienna | 16 | 10% |
| 2013 Sienna | 22 | 12% |
| 2011 Sienna | 67 | 11% |
| 2010 Sienna | 20 | 12% |
Other reported problem areas on the 2012 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.