2026 Toyota SIENNA HYBRID problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
13 owner complaints analyzed
0 distinct recall campaigns
3,000 mi median reported failure mileage
Scope: 2026 model year. Data snapshot: . 3 complaints include usable failure mileage.
Most common problems
Seats is the most frequently named component, appearing in 3 of 13 complaints (23.1%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 3 | 23.1% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Seats | 3 |
| Back Over Prevention: Sensing System: Camera | 1 |
| Exterior Lighting | 1 |
| Forward Collision Avoidance: Adaptive Cruise Control | 1 |
| Service Brakes | 1 |
| Structure:Body | 1 |
| Structure:Body:Door | 1 |
| Structure:Body:Door:Hinge And Attachments | 1 |
Seats: 3; Back Over Prevention: Sensing System: Camera: 1; Exterior Lighting: 1; Forward Collision Avoidance: Adaptive Cruise Control: 1; Service Brakes: 1; Structure:Body: 1; Structure:Body:Door: 1; Structure:Body:Door:Hinge And Attachments: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 3 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 3; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
Under 25,000 miles has the most reports with usable mileage (3). 10 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2025 | 1 |
| 2026 | 12 |
2025: 1; 2026: 12
Pattern summary
Seats leads the component reports. Braking behavior appears in 3 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11745053 · 2026-06-18 (June 18, 2026)
Less than 1000 miles on my car i do not remember exact dates hence i have added todays date for incident date.All three incident happend in three different days. Scenario 1 two times. Scenario 2 one time --- SCENARIO 1: Curved Road / No Lane Markings --- Conditions: ACC set at 25 MPH on an undivided two-way road with no lane markings. Parked vehicles present at curves; oncoming traffic at safe distance. Issue: On two separate occasions, the vehicle applied sudden, significant braking without driver input while navigating curves. No imminent co…
Owner-reported narrative. Look up ODI 11745053 at NHTSA ↗
Owner report 11748875 · 2026-07-07 (July 7, 2026)
While driving my new 2026 Toyota Sienna Woodland Edition home from the dealership on the day of purchase (XXX), I applied routine braking to stop at a yellow light. Both second-row captain's chairs, which had been slid fully rearward and left in the upright position during the dealer's cargo-space demo, and which I assumed had been properly locked, suddenly slammed forward with extreme force into the back of the front seats, and the seatbacks self-folded on impact. Notably, both chairs failed identically and simultaneously, which suggests a sys…
Owner-reported narrative. Look up ODI 11748875 at NHTSA ↗