2021 Toyota Sienna Seat belts Problems
- Complaints
- 8about this part
- Share
- 5%of 165 total for the year
- Median mileage
- 13,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 8 complaints about the seat belts of the 2021 Toyota Sienna, 5% of the 165 complaints for this model year. Where a mileage was given, the median is 13,000 miles.
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.
“Hi, i complained many time about seat belt sign of front passenger side and rear passenger right side. while driving expect me no one in the car but still i get seat belt sign.”
NHTSA complaint #11501108, filed 2023-01“My young daughter got the seatbelt caught around her waist. The seatbelt was unable to give any slack and was locked up. It could retract a little bit but that would only squeeze around my daughter’s waist tighter. The seatbelt would not pull forward. We eventually had to cut the seatbelt to release her. It caused red marks around her waist and had we tried to retract it any further could have suffocated her. We took the van to the dealer to replace the seatbelt and they had said they heard of this happening before but it wasn’t a malfunction but just a weird design quirk. …”
NHTSA complaint #11541028, filed 2023-08“This recall has been open for 7 months and a remedy has still not been issued - this doesn’t seem reasonable for a safety concern. I have also several times experienced a failure in the “extra” 8th passenger seat (middle row middle seat) sensor - it alarms that the seat belt isn’t buckled even when that seat is not in use and not even installed at the time.”
NHTSA complaint #11603010, filed 2024-07“The driver-side second-row seatbelt goes slack for no reason while driving. All tension is released, and the loose belt falls forward. This is a serious safety issue for the child riding in that seat with no working seatbelt. This has happened about a dozen times on various days while driving. The dealer first denied there was a problem, then they claimed they fixed it. But it is still happening.”
NHTSA complaint #11451325, filed 2022-02“The contact owns a 2021Toyota Sienna Hybrid. The contact stated that while her son was occupying the passenger side in the third-row seat, the seat belt locked and failed to release. The occupant was unable to get out of the seat belt. The occupant sustained marks on his stomach but no medical attention was provided. The contact had to cut the seat belt to release the child from the seat. The vehicle was taken to the local dealer but was not diagnosed or repaired. The manufacturer was notified but no additional assistance was provided. The approximate failure mileage was 13,000. …”
NHTSA complaint #11464377, filed 2022-05, 13,000 milesSeat belts: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 1 | 1% |
| 2021 | 8 | 5% |
| 2019 | 2 | 4% |
| 2017 | 4 | 3% |
| 2016 | 6 | 8% |
| 2015 | 8 | 3% |
| 2014 | 5 | 3% |
| 2013 | 4 | 2% |
| 2012 | 3 | 1% |
| 2011 | 9 | 1% |
| 2010 | 5 | 3% |
| 2009 | 3 | 1% |
| 2008 | 13 | 3% |
| 2007 | 5 | 1% |
| 2006 | 38 | 4% |
| 2005 | 83 | 7% |
| 2004 | 98 | 5% |
| 2003 | 5 | 5% |
| 2002 | 7 | 4% |
| 2001 | 9 | 5% |
| 2000 | 21 | 6% |
| 1999 | 6 | 3% |
| 1998 | 12 | 4% |
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 complaintsTransmission and drivetrain
8 complaintsBody and structure
6 complaintsVisibility (wipers, defrost, mirrors)
6 complaintsForward collision avoidance
5 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 31, 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