Toyota Sienna electrical system problems by year
728 NHTSA owner complaints name the electrical system across 25 Sienna model years. The most reported year is 2004 with 132 reports.
| Year | Electrical System reports | Share | Median mileage | |
|---|---|---|---|---|
| 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% | 28,650 mi | |
| 2014 Sienna | 16 | 10% | — | |
| 2013 Sienna | 22 | 12% | 64,000 mi | |
| 2012 Sienna | 27 | 11% | 54,875 mi | |
| 2011 Sienna | 67 | 11% | 64,000 mi | |
| 2010 Sienna | 20 | 12% | 94,353 mi | |
| 2009 Sienna | 28 | 14% | 115,000 mi | |
| 2008 Sienna | 45 | 11% | 74,233 mi | |
| 2007 Sienna | 18 | 5% | 64,650 mi | |
| 2006 Sienna | 85 | 8% | 73,000 mi | |
| 2005 Sienna | 65 | 6% | 85,000 mi | |
| 2004 Sienna | 132 | 6% | 82,000 mi | |
| 2003 Sienna | 4 | 4% | — | |
| 2002 Sienna | 24 | 13% | 93,224 mi | |
| 2001 Sienna | 20 | 11% | 60,000 mi | |
| 2000 Sienna | 17 | 5% | 69,140 mi | |
| 1999 Sienna | 10 | 5% | — | |
| 1998 Sienna | 14 | 5% | — |
Share is the fraction of that year’s complaints naming the electrical system. Raw counts are not adjusted for sales volume — years that sold more units naturally accumulate more reports.