What breaks most · 2021 to 2022 model years
Toyota redundant Sienna problems by year
Owners have filed 284 safety complaints with NHTSA about the Toyota redundant Sienna across model years 2021 to 2022. Two years stand out: 2021 for brakes complaints and 2022 for brakes complaints.
- Years to check closely: 2021, 2022
- Complaints on file
- 2842021 to 2022, all trims
- Worst year
- 2021165 complaints
- Crashes reported
- 183 fires · 12 injuries · 0 deaths
- Typical failure mileage
- 12kMedian where owners gave mileage
- Recall campaigns
- 3Across the years shown
Complaints by model year
Raw filings with NHTSA, not adjusted for how many were sold.
| Model year | Complaints | Crashes | Recalls | Most-reported component |
|---|---|---|---|---|
| 165 | 14 | 1 | Brakes (80) | |
| 119 | 4 | 2 | Brakes (62) |
What fails on the 2021 Toyota redundant Sienna
| Component | Share of complaints | Filings | Crashes | Parts for this job |
|---|---|---|---|---|
| BrakesBrake pads, rotors and calipers | 48% |
80 | 8 | Shop brakes parts for the 2021 Toyota redundant Sienna |
| Unknown or other | 16% |
27 | 3 | — |
| Seats | 10% |
17 | 1 | — |
| Air bags | 10% |
16 | 2 | Check recalls for air bags on NHTSA.gov |
| Electrical systemAlternators, starters and ignition | 8% |
13 | 1 | Shop all electrical system parts, not filtered to this vehicle |
| Speed control and throttleThrottle and pedal sensors | 6% |
10 | 1 | Shop speed control and throttle parts for the 2021 Toyota redundant Sienna |
| EngineEngine gaskets and seals | 5% |
8 | 0 | Shop engine parts for the 2021 Toyota redundant Sienna |
| Seat belts | 5% |
8 | 0 | Check recalls for seat belts on NHTSA.gov |
One complaint can name more than one component, so shares add to more than 100%. "Unknown or other" is NHTSA's uncategorized bucket and is shown but never ranked.
In owners' words
Complaint narratives as filed with NHTSA, trimmed for length.
-
When braking to a stop at low speed (stopping at stop sign or at light), then car accelerates forward even though my foot is on the brake attempting to slow the car down. This unintended acceleration is dangerous and can cause an accident.
-
The 2022 Toyota Sienna temporarily accelerates or surges forward while braking, or has a momentary loss of braking / deceleration before it re-engages in braking.
How to read this page
Every figure comes from the National Highway Traffic Safety Administration's public complaint database, which holds every safety-related defect complaint filed by owners since 1995. We refresh it monthly and count each complaint once per component it names. Data through September 6, 2026.
NHTSA only accepts safety-related complaints. Rattles, paint, infotainment bugs and other annoyances are under-reported here, so this page is a map of what fails in ways owners consider dangerous, not a full reliability score.
Counts are raw. Use the year-over-year shape and the component mix, not the absolute numbers. Where a component maps to parts we stock, the row links to that category filtered to the year you are viewing. Air bag and seat belt complaints link to the recall checker instead, because those repairs are almost always covered.
Common questions
Which Toyota redundant Sienna years have the most problems?
By NHTSA complaint volume, 2021, 2022 carry the most filings on the Toyota redundant Sienna. The 2021 alone has 165 complaints, led by brakes.
What is the most common Toyota redundant Sienna problem?
On the 2021 model year, the most-reported component is brakes with 80 complaints. The table above lists the top components for every year.
At what mileage do Toyota redundant Sienna problems start?
The median mileage at failure across all Toyota redundant Sienna complaints that include mileage is about 12,000 miles. Older model years skew higher; the per-year figure is in the "at a glance" card.
Are these complaints verified?
No. NHTSA publishes complaints as submitted and does not investigate individual filings. Patterns across hundreds of complaints are meaningful; a single one is not.