2021 Toyota Sienna Hybrid · symptom sheet
Seat belt or seat problems
- 29owner reports
- 18,000median miles
- 1involved a crash
Newest report Sep 5, 2026 · checked Sep 27, 2026
29 of the 208 complaints on this car describe seat belt.
Tick what matches of 29 reports
Seat belt on other Sienna Hybrid years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2022, 2026.
What this problem usually is
This group covers the belt and the seat it's bolted to: buckles that won't latch or won't let go, belts that lock up and won't pull out, and seats that shift or rock in their tracks. It's a wide bucket, with over 9,000 complaints across the vehicles on this site, and a quarter of them mention a recall.
What got replaced
Owners who name the part that was replaced mention the buckle (5 reports).
Recalls and investigations
One recall on the seats covers the 2021 model year. A recall on the same system isn't always the same failure, so read the defect text.
The bolts for the seatbacks on the third-row seat assemblies may not be tightened properly.
All 4 recalls on the 2021 Toyota Sienna Hybrid, with the owner complaints on each recalled system
When it happens
Too few of these reports state a mileage to give a range.
Is this a known problem?
The manufacturer has sent NHTSA 2 service bulletins or notices for the 2021 Toyota Sienna Hybrid that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
Some 2010 ? 2022 model year Toyota vehicles may exhibit paint stains after the removal of Rapgard?. The paint stains may appear to be under the clear coat but are usually under wrinkles in the Rapgard?.
Some 2010 ? 2021 model year Toyota vehicles may exhibit paint stains after the removal of Rapgard?. The paint stains may appear to be under the clear coat but are usually under wrinkles in the Rapgard?.
What owners wrote
“brake sleeps sometime when i press brake pedal i took car to dealer once,they said need time i did not have much time took another time, they reseted system still... my warranty is over now. rear seat,make shake noise and check rear seat sign on dealer can't find problem. did not do anything since new car. i do not know any other 2021 sienna drivers have same problem.”
Filed Sep 5, 2026
“2nd row passenger seat recline does not work. My seat is very reclined now causing the 2nd row passenger to not be in the optimal position for SRS airbag performance that may result in possible death due to head impact during a side collision. Toyota likely has enough data to issue a TSB to resolve this issue preventing serious injury or death to one of my children.”
Filed Sep 17, 2025
“My van been giving me some weird issues lately. When Iâm going downhill, my brakes donât seem to work well! I have to push it all the way down, like a spongy. It doesnât break until I put on the emergency brake. the seat broke only weighed 185 pounds! the wiper blades donât do a great job cleaning the driverâs side after I bought new ones. Dealership wipers”
Filed May 2, 2025
“This recall has been open for 7 months and a remedy has still not been issued - this doesnât seem reasonable for a safety concern. I have also several times experienced a failure in the âextraâ 8th passenger seat (middle row middle seat) sensor - it alarms that the seat belt isnât buckled even when that seat is not in use and not even installed at the time.”
Filed Jul 17, 2024
Should you keep driving it?
This page can't tell you that. 1 of 29 reports involved a crash and 4 people were hurt. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Brakes grind, pulse or wear early 87 reports
- Airbag warning light or recall 29 reports