2021 Toyota Sienna electrical system problems
13 owner complaints filed with NHTSA name the electrical system on the 2021 Toyota Sienna — 8% of all complaints for this model year.
What owners report
“I was driving my Toyota Sienna on a busy 6 lane highway in the second to the left lane, on a bridge. Suddenly without any warning AT ALL, my vehicle lost all power and came to an abrupt halt in the middle of high speed traffic. My wife and children were all in the car and we were in imminent danger…”
filed Feb 2, 2026
“At the begining of 2024, I received a recall letter from Toyota regarding the airbag malfunction. I was told to wait for a remedy by Q3 of 2024. I patiently waited and was very anxious driving my vehicle. I recently did talk to my local dealer during my maintenance and they stated that they do not…”
filed Oct 14, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
22td04 expired on june 30, 2025 technical instructions for limited service campaign 22td04 accessory dash camera firmware update certain 2021 model year sienna vehicles certain 2021 model year venza vehicles
22TD04 · Service Bulletin/Repair Instructions · issued Jul 1, 202522TD04 Expired on June 30, 2025 A Toyota Genuine Accessory Dash Camera was installed in the involved vehicles. If the Micro SD Card used in the accessory dash camera is damaged the accessory dash camera may continuously…
22TD04 · Service Campaign · issued Jul 1, 202522TD04 Expired on June 30, 2025 A Toyota Genuine Accessory Dash Camera was installed in the involved vehicles. If the Micro SD Card used in the accessory dash camera is damaged the accessory dash camera may continuously…
22TD04 · Service Campaign · issued Jul 1, 2025
Electrical System problems in other Sienna years
| Year | Reports | Share |
|---|---|---|
| 2022 Sienna | 12 | 10% |
| 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% |
| 2012 Sienna | 27 | 11% |
| 2011 Sienna | 67 | 11% |
| 2010 Sienna | 20 | 12% |
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.