2021 Toyota Sienna Forward collision avoidance Problems
- Complaints
- 5about this part
- Share
- 3%of 165 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the forward collision avoidance of the 2021 Toyota Sienna, 3% of the 165 complaints for this model year. 1 of these say a crash was involved, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I have this car for 1 year, and I’ve have problems when I am driving and I have use the brake the car stop and keeping going forward ,I already had a accident hitting a car in front me,I’ve see a lot complain about this problems and the Toyota is not getting fixed and keeping saying that is the driver fault,I work as a driver I need this problem get fix.”
NHTSA complaint #11572459, filed 2024-02“When I apply brakes sometimes the brake is released and I need to push the paddle hard to engage the brake again. Same thing happens sometimes on adaptive cruise control. It sometimes release the brake and I need to push the paddle to engage the brake.”
NHTSA complaint #11583550, filed 2024-04“I BELIEVE THE COMPUTER CAUSED THE PROBLEM. THE CAR IS AVAILABLE FOR INSPECTION AS PERSONNEL AT GETTEL TOYOTA IN PUNTA GORDA CLAIMED THEY COULDN'T TOUCH THE COMPUTER AND HAVE DONE NOTHING. Purchased Sienna in August 2021. In October at about 5:30 a.m. we were in the far left lane on a PA interstate, traffic came to a stop for construction. A delivery truck in front of us rolled backward a bit. When traffic started up again, our car would not go forward, only reverse. We tried drive --nothing--only had reverse. Finally, with cars whizzing around us, shut the engine off. …”
NHTSA complaint #11579932, filed 2024-03“Van has just over 5k miles. Multiple warnings occurred while at speed on a highway. Primary warning was 'Low Brake Power' and braking became extremely touchy as it seemed to utilize the emergency brake as a backup. This extreme braking is hazardous and could result in an accident caused by braking too quickly - with a possible rear-end collision by traffic to the rear. Additional warnings/malfunctions were listed as well, due to the low brake power: LTA Malfunction (Lane keep assist), Automatic Emergency Brake Malfunction, Parking Brake Malfunction, Check Engine. …”
NHTSA complaint #11423107, filed 2021-07Forward collision avoidance: other model years
Other parts of the 2021 Toyota Sienna
80 complaintsOther or unknown
29 complaintsSeats
17 complaintsAir bags
16 complaintsElectrical system
13 complaintsVehicle speed control
10 complaintsEngine
8 complaintsSeat belts
8 complaintsTransmission and drivetrain
8 complaintsBody and structure
6 complaintsVisibility (wipers, defrost, mirrors)
6 complaintsFuel system
5 complaints
← All problems reported for the 2021 Toyota Sienna
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology