2021 Toyota Sienna problems by component
165 owner complaints filed with NHTSA for the 2021 Toyota Sienna, grouped by the component owners reported. Each component links to a detailed breakdown with mileage, severity and owner reports.
| Component | Complaints | Share | Median mileage |
|---|---|---|---|
| Service Brakes → | 80 | 48% | — |
| Seats → | 17 | 10% | — |
| Air Bags → | 16 | 10% | — |
| Electrical System → | 13 | 8% | — |
| Vehicle Speed Control → | 10 | 6% | — |
| Engine | 8 | 5% | — |
| Power Train | 8 | 5% | — |
| Seat Belts | 8 | 5% | — |
| Structure | 6 | 4% | — |
| Forward Collision Avoidance | 5 | 3% | — |
| Fuel/propulsion System | 5 | 3% | — |
| Visibility | 4 | 2% | — |
| Steering | 3 | 2% | — |
| Lane Departure | 2 | 1% | — |
| Suspension | 2 | 1% | — |
| Tires | 2 | 1% | — |
| Visibility/wiper | 2 | 1% | — |
| Back Over Prevention | 1 | 1% | — |
| Chest Clip, Buckle, Harness | 1 | 1% | — |
| Exterior Lighting | 1 | 1% | — |
| Latches/locks/linkages | 1 | 1% | — |
| Tether, Lower Anchor (on Car Seat OR Vehicle) | 1 | 1% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.