2022 Toyota Sienna electrical system problems
12 owner complaints filed with NHTSA name the electrical system on the 2022 Toyota Sienna — 10% of all complaints for this model year.
What owners report
“The wiring harness connector for both lights has had water accumulate in the connector which causes the rear tail lights to fail. Both of my tail lights have failed, and the cause was corrosion inside the wiring harness connector. I had to replace the wiring harness and connectors on both sides…”
filed Sep 16, 2025
“Pre-Collision System Malfunction, Hybrid System Malfunction, AWD System Malfunction suddenly when restarting the vehicle. Towed to Toyota of Downtown LA dealership. Toyota of Downtown LA Service tells me that the CPU on my relative new Sienna 2022 was fried from jump start when Sienna…”
filed Sep 9, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Electrical System problems in other Sienna years
| Year | Reports | Share |
|---|---|---|
| 2021 Sienna | 13 | 8% |
| 2020 Sienna | 7 | 18% |
| 2019 Sienna | 4 | 9% |
| 2018 Sienna | 7 | 10% |
| 2017 Sienna | 20 | 13% |
| 2016 Sienna | 9 | 12% |
| 2015 Sienna | 44 | 19% |
| 2014 Sienna | 16 | 10% |
| 2013 Sienna | 22 | 12% |
| 2012 Sienna | 27 | 11% |
| 2011 Sienna | 69 | 11% |
| 2010 Sienna | 20 | 12% |
Other reported problem areas on the 2022 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.