Toyota Sienna: which model years draw the most owner complaints?
8,319 complaints filed with NHTSA about the Toyota Sienna, model years 2000 to 2022. 2 model years stand out for the engine or transmission: 2007 (engine 5.4×); 2000 (engine 6.3×, transmission 6.7×). Quietest mature years by complaint count: 2019, 2018, 2016. Counts of unverified owner reports, compared only with other years of the same model; not failure rates.
Complaints by model year
| MODEL YEAR | COMPLAINTS | VS OTHER YEARS | STANDS OUT | RECALLS |
|---|---|---|---|---|
| 2000 Sienna | 363 | engine 6.3×, transmission 6.7× | 1 | |
| 2001 Sienna | 179 | — | 2 | |
| 2002 Sienna | 181 | — | 1 | |
| 2003 SiennaFEW REPORTS | 105 | quiet: 4 of 20 | 1 | |
| 2004 Sienna | 2,062 | — | 10 | |
| 2005 Sienna | 1,129 | — | 12 | |
| 2006 Sienna | 1,017 | — | 11 | |
| 2007 Sienna | 364 | engine 5.4× | 10 | |
| 2008 Sienna | 429 | — | 9 | |
| 2009 Sienna | 207 | — | 10 | |
| 2010 Sienna | 172 | quiet: 7 of 20 | 8 | |
| 2011 Sienna | 612 | — | 14 | |
| 2012 Sienna | 247 | — | 9 | |
| 2013 Sienna | 183 | — | 6 | |
| 2014 Sienna | 163 | quiet: 6 of 20 | 6 | |
| 2015 Sienna | 229 | — | 6 | |
| 2016 SiennaFEW REPORTS | 76 | quiet: 3 of 20 | 5 | |
| 2017 Sienna | 160 | quiet: 5 of 20 | 10 | |
| 2018 SiennaFEW REPORTS | 72 | quiet: 2 of 20 | 7 | |
| 2019 SiennaFEW REPORTS | 47 | quiet: 1 of 20 | 7 | |
| 2020 SiennaFEW REPORTS | 38 | — | 2 | |
| 2021 Sienna | 165 | — | 1 | |
| 2022 SiennaFEW REPORTS | 119 | — | 2 |
"Stands out" = 40 or more complaints naming that system and at least twice the model's quiet (lower-quartile) year, or twice the share seen across every vehicle of that model year. Newer years have had less time on the road. "Quiet" ranks only years with 7+ years on the road and 20+ complaints. NHTSA data through November 2026.
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Other Toyota models
Toyota 4Runner · Toyota Avalon · Toyota C-HR · Toyota Camry · Toyota Camry Hybrid · Toyota Camry Solara · Toyota Celica · Toyota Corolla · Toyota Corolla Cross · Toyota Corolla Matrix · Toyota Echo · Toyota FJ Cruiser · Toyota Grand Highlander · Toyota Highlander · Toyota Highlander Hybrid · Toyota Matrix · Toyota Prius · Toyota Prius c · Toyota Prius v · Toyota RAV4 · Toyota RAV4 Hybrid · Toyota RAV4 Prime · Toyota Sequoia · Toyota Sienna Hybrid · Toyota Tacoma · Toyota Tundra · Toyota Venza · Toyota Venza Hybrid · Toyota Yaris. All makes and models.
Source: NHTSA public complaints, recalls, service bulletin and investigation databases, data received through November 2026. Complaints are unverified reports from owners, not failure rates: sales volumes are unknown, so a model year is only compared with other years of the same model. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Year pages: 20002001200220042005200620072008200920102011201220132014201520172021