2021 Toyota Sienna problems
What owners report to NHTSA, grouped by component, with the recalls that cover them.
NHTSA has 43 owner complaints on file for the 2021 Toyota Sienna, filed between 2020-12-03 and 2026-09-15. The most common problem areas are the air bags (13, 30%), service brakes (6, 14%) and seats (5, 12%). Owners reported 1 fire and 1 injury in these complaints. NHTSA lists 4 recalls for this model year.
Last updated: · Source: NHTSA complaints and recalls databases
2021 Toyota Sienna complaints by component
| Component | Complaints | Share | Crashes | Fires | Injuries |
|---|---|---|---|---|---|
| Air bags | 13 | 30% | 0 | 0 | 0 |
| Service brakes | 6 | 14% | 0 | 0 | 0 |
| Seats | 5 | 12% | 0 | 0 | 1 |
| Structure | 5 | 12% | 0 | 0 | 1 |
| Electrical system | 4 | 9% | 0 | 0 | 0 |
| Visibility/wiper | 4 | 9% | 0 | 0 | 0 |
| Engine | 3 | 7% | 0 | 1 | 0 |
| Unknown or other | 3 | 7% | 0 | 0 | 0 |
| Exterior lighting | 2 | 5% | 0 | 0 | 1 |
| Power train | 2 | 5% | 0 | 0 | 0 |
| Suspension | 2 | 5% | 0 | 0 | 0 |
| Back over prevention | 1 | 2% | 0 | 0 | 0 |
| Forward collision avoidance | 1 | 2% | 0 | 0 | 0 |
| Fuel/propulsion system | 1 | 2% | 0 | 0 | 0 |
| Lane departure | 1 | 2% | 0 | 0 | 0 |
A complaint can name several components, so shares can add up to more than 100%. Crashes, fires and injuries are as reported by owners.
The top problem areas, in plain English
Each summary is built from the complaint counts and NHTSA recall notices, not from individual owner stories.
Air bags: 13 complaints
- 13 complaints of 43 (30%) name the air bags — frontal, side and curtain air bags, their crash sensors and control module.
- None of these complaints reports a crash, fire or injury.
- One NHTSA recall covers this system on the 2021 Toyota Sienna; the recall, campaign 23V865000, says: “A short circuit may develop in the Occupant Classification System (OCS) sensor, preventing the front passenger air bag from deploying.”
Service brakes: 6 complaints
- 6 complaints of 43 (14%) name the service brakes — the foot-brake system: pads, rotors, calipers, lines and ABS.
- None of these complaints reports a crash, fire or injury.
- No NHTSA recall for the 2021 Toyota Sienna covers this system.
Seats: 5 complaints
- 5 complaints of 43 (12%) name the seats — seats, seat frames, adjusters and head restraints.
- Owners reported 1 injury in these complaints.
- One NHTSA recall covers this system on the 2021 Toyota Sienna; the recall, campaign 25V086000, says: “The bolts for the seatbacks on the third-row seat assemblies may not be tightened properly.”
Structure: 5 complaints
- 5 complaints of 43 (12%) name the structure — the body and frame structure.
- Owners reported 1 injury in these complaints.
- No NHTSA recall for the 2021 Toyota Sienna covers this system.
Electrical system: 4 complaints
- 4 complaints of 43 (9%) name the electrical system — wiring, battery and charging, fuses, control modules and in-car electronics.
- None of these complaints reports a crash, fire or injury.
- No NHTSA recall for the 2021 Toyota Sienna covers this system.
Visibility/wiper: 4 complaints
- 4 complaints of 43 (9%) name the visibility/wiper — the windshield, windows, mirrors, wipers and defrosters.
- None of these complaints reports a crash, fire or injury.
- No NHTSA recall for the 2021 Toyota Sienna covers this system.
When the complaints were filed
| Year filed | Complaints |
|---|---|
| 2020 | 1 |
| 2021 | 5 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 9 |
| 2025 | 6 |
| 2026 | 19 |
What is counted
Owner complaints filed with NHTSA for the model names SIENNA, SIENNA HYBRID, model year 2021. Complaints are unverified owner reports; a recall is NHTSA's confirmed safety defect. See the 2021 Toyota Sienna recalls.
Frequently asked questions
What are the most common problems with the 2021 Toyota Sienna?
By NHTSA owner complaints, the 2021 Toyota Sienna's most common problem areas are the air bags (13 of 43 complaints), service brakes (6 of 43 complaints) and seats (5 of 43 complaints).
How many complaints does the 2021 Toyota Sienna have?
NHTSA has 43 owner complaints on file for the 2021 Toyota Sienna, including 1 reported fire.
Is there a recall for the 2021 Toyota Sienna's problems?
NHTSA lists 4 recalls for the 2021 Toyota Sienna; 2 of the top 6 complaint areas have a matching recall. Recall repairs are free at a dealer; check your VIN for open recalls.