repaired · 2024 Q1
Control module: software
Risk. Driving with a deactivated stability control system increases the risk of a crash.
2021 Toyota Redundant SiennaProblems, recalls & complaints
NHTSA has logged 165 owner complaints about the 2021 Toyota Redundant Sienna, most often about the service brakes. It is covered by 1 safety recall, and for recall 22V-239 the manufacturer reports only 95% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through February 4, 2026. Updated daily.
Complaints by system
Where the 2021 Toyota Redundant Sienna has problems
165 complaints grouped by the system owners reported.
80Service brakes8 crash/fire/injury
17Seats1 crash/fire/injury
16Air bags2 crash/fire/injury
13Electrical system2 crash/fire/injury
10Vehicle speed control
8Seat belts
8Engine
8Power train
6Structure
3013 other systems2 crash/fire/injury
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Service brakes | 80 | 8 |
| Seats | 17 | 1 |
| Air bags | 16 | 2 |
| Electrical system | 13 | 2 |
| Vehicle speed control | 10 | 1 |
| Seat belts | 8 | 1 |
| Engine | 8 | 1 |
| Power train | 8 | 2 |
| Structure | 6 | 0 |
| 13 other systems | 30 | 2 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
1 recall
2021 Toyota Redundant Sienna recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Toyota.
Best & worst years
2021 vs. every other Redundant Sienna year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Redundant Sienna median. How we score
'21'22
- Avoid
- Caution
- Solid
- Best
- Not rated
In owners' words
What Redundant Sienna owners report
Recent service brakes complaints filed with NHTSA, shortened. Personal details are removed.
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.
Brake Transition Issues: I have noted frequent jolts of power when braking, which creates at least the sensation of, if not actual acceleration while breaking. Web research suggests this may be linked to the vehicle switching between regenerative and mechanical braking systems, and that the problem…
Occasionally the brakes seem to stop working briefly, and the van even accelerates while the brakes are engaged. It happened again today but has happened since we got the van new in 2021. The dealer cannot replicate the problem. The problem is discussed on this thread: [XXX] INFORMATION REDACTED…
Own a 2021 Redundant Sienna?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.