2021 Toyota Sienna Hybrid problems, complaints & recalls

Updated Oct 11, 2026 from NHTSA data · How we count

Owners have filed 43 complaints with NHTSA about the 2021 Toyota Sienna Hybrid, most often about airbags. There are 4 recalls for this model year.

Complaints: 43
Recalls: 4
Crashes: 0
Fires: 1
Injuries: 1
Median mileage: 30,800 mi

Key facts

Airbags is the most-reported problem area, named in 13 of 43 complaints (30%).
Brakes (7) and body & structure (6) follow.
Half of the complaints that list mileage happened before 30,800 mi.
Owners reported 0 crashes, 1 fire and 1 injury.
The 2021 Toyota Sienna Hybrid has 4 recalls on file.
NHTSA has opened 1 defect investigation covering this vehicle.
It ranks 4th of 6 Toyota Sienna Hybrid model years by our severity-weighted complaint score (1st = worst).

A complaint can mention more than one problem area, so categories add up to more than the total.

Most-reported components

Component (as filed with NHTSA)	Complaints
Air bags	13
Service brakes	6
Seats	5
Visibility/wiper	4
Electrical system	3
Unknown or other	3
Engine	3
Structure:body	3

When problems happen (mileage)

Mileage at the time of the problem, for 2021 Toyota Sienna Hybrid complaints that list mileage.

2021 Toyota Sienna Hybrid recalls (4)

Recall 25V877000Dec 17, 20251,019 vehicles
EQUIPMENT ADAPTIVE/MOBILITY:WHEELCHAIR RESTRAINTS/SECUREMENT:LATCH/ANCHOR:
Vantage Mobility, LLC (VM) is recalling certain 2021-2026 Honda Odyssey, 2021-2025 Chrysler Pacifica, and Toyota Sienna vehicles equipped with QRT-Deluxe and QRT-Max wheelchair restraints. The retractors may not lock, preventing the wheelchair from being properly secured.
Risk: An unsecured wheelchair can move during transit, increasing the risk of injury.
Remedy: Dealers will inspect and replace the retractors, free of charge. Owner notification letters was mailed January 27, 2026. Owners may contact Vantage Mobility customer service at 1-800-488-9082.
Recall 25V086000Feb 13, 2025167,802 vehicles
SEATS:CRITICAL FASTENERS · SEATS:MID/REAR ASSEMBLY:RECLINER
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2025 Sienna Hybrid vehicles. The bolts for the seatbacks on the third-row seat assemblies may not be tightened properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 202, "Head Restraints," 207, "Seating Systems," and 225, "Child Restraint Anchorage Systems."
Risk: An improperly tightened seatback may not adequately restrain the occupant during a crash, increasing their risk of injury.
Remedy: Dealers will tighten the seat assembly bolts, free of charge. Owner notification letters were mailed April 1, 2025. Owners may contact Toyota's customer service at 1-800-331-4331. Toyota's number for this recall is 25TA05.
Recall 23V865000Dec 20, 2023999,901 vehicles
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2021 Avalon, Avalon Hybrid, Corolla, Highlander, Highlander Hybrid, RAV4, RAV4 Hybrid, Lexus ES350, Lexus RX350, Lexus RX450H, 2021 Sienna Hybrid, Lexus ES250, 2020-2022 Camry, Camry Hybrid, and ES300H vehicles. A short circuit may develop in the Occupant Classification System (OCS) sensor, preventing the front passenger air bag from deploying.
Risk: An air bag that does not deploy during a crash increases the risk of injury.
Remedy: Dealers will inspect and replace the sensor as necessary, free of charge. Interim letters notifying owners of the safety risk were mailed in February 2024. Some final remedy owner letters were mailed October 31, 2024. Letters will continue to be mailed in phases through January 2026. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 23TB15/23TA15 Lexus 23LB03/23LA03.
Recall 22V239000Apr 13, 2022458,110 vehicles
ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE
Toyota Engineering & Manufacturing (Toyota) is recalling certain 2022 Lexus LX 600, Lexus NX 350h, Lexus NX 450h+, Toytoa RAV4 Hybrid, 2021-2022 Lexus LS 500h, Toyota Mirai, RAV4 PRIME, Sienna, Venza, and 2020-2022 Toyota Highlander Hybrid vehicles. The Skid Control ECU software may not turn on the Vehicle Stability Control (VSC) system when the vehicle is restarted after the driver has disabled the VSC system. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 126, "Electronic Stability Control Systems."
Risk: Driving with a deactivated stability control system increases the risk of a crash.
Remedy: Dealers will update the Skid Control ECU software, free of charge. Owner notification letters were mailed May 27, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 22TA03. Lexus' number for this recall is 22LA01.

NHTSA defect investigations

DP22005Opened Jan 27, 2023Closed Aug 7, 2023led to recall 22V063000
Pedestrian alert sounds
NHTSA received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at NHTSA.gov under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after Marc…

Recent 2021 Toyota Sienna Hybrid complaints

Excerpts of the newest owner complaints, lightly cleaned of personal details. Complaints are unverified owner reports.

Filed Sep 15, 2026VAElectrical System
The front passenger door lock actuator does not work properly causing the door to stay locked or unlocked despite attempts to change the door lock through the internal power locking system or remote key. This presents a safety issue in that it requires a manual lock/unlocking of the door should an emergency situation arise and expeditious ingress or egress from the vehicle be required. The door actuator is presently working intermittently and appears likely to fail…
NHTSA complaint #11764560 · source
Filed Sep 10, 2026WIBody & Structure
The rear power liftgate hinges on my 2021 Toyota Sienna failed structurally under normal, everyday operation. The power liftgate motor and struts appear to exert uneven or excessive pressure on the rear hatch assembly, causing the metal hinges to crack. Before the failure, we noticed a loud popping/grinding sound when opening the hatch, which quickly progressed to the liftgate binding and misaligning. This is a severe safety hazard because the structural failure prevents the…
NHTSA complaint #11763294 · source
Filed Sep 5, 2026CABrakesSeats & Seat Belts
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.
NHTSA complaint #11762371 · source
Filed Sep 2, 2026ILBody & Structure
My liftgate has been making loud noises upon closing. The dealership checked it and diagnosed that the trunk door is mis-aligned, leaving a gap so that the door WOULD NOT SECURELY CLOSE. I was referred to the body shop to have the shocks and hinges changed. Further discussions mentioned this was a common problem with the Toyota RAV-4 where the hydraulics fail causing a bad alignment therefore affecting the hinges. Although my vehicle is a Toyota SIENNA, I had asked if this…
NHTSA complaint #11761738 · source
Filed Sep 2, 2026NYSeats & Seat Belts
The electronic driver's seat motor and track assembly failed completely on my 2021 Toyota Sienna (VIN: [XXX]) at less than 18,000 miles. The seat is permanently seized in a fixed position. This creates an immediate safety and crash-protection hazard, as drivers of different heights cannot safely adjust their distance from the steering wheel airbag or properly reach the pedals. Toyota corporate is refusing to repair this premature manufacturing defect on a known problematic…
NHTSA complaint #11761587 · source
Filed Jul 22, 2026FLOther / Unknown
Vehicle safety SOS button is not functioning properly. When the SOS button is depressed in case of emergency, the vehicle notifies user at the emergency system is un operational. Toyota includes this for 10 years from the date purchase and my vehicle is a 2021 making this feature active till 2031. By having the SOS button nonfunctional occupants of the vehicle, which may rely on this feature may sustain injury or death by this feature not operating correctly in the event of…
NHTSA complaint #11752014 · source
Filed Jul 13, 2026NYDriver Assistance & Safety TechElectrical System
FAILURE: Blind spot monitor module failed due to a corroded internal electrical connector. The failure disabled both the Blind Spot Monitor (BSM) and Rear Cross-Traffic Alert (RCTA). Both remain inoperative. The failed component has not been replaced and is available for inspection. SAFETY RISK: Two active safety systems are disabled. The vehicle no longer warns of vehicles in the blind spot during lane changes, and no longer warns of cross traffic when backing out of…
NHTSA complaint #11750096 · source
Filed Jul 13, 2026NYBrakes
FAILURE: Brake control system. Vehicle intermittently surges forward while braking at low speed, most often through a curve — the brakes momentarily release and the vehicle lurches before braking resumes. Appears to occur during the transition between regenerative and friction braking. Vehicle available for inspection. SAFETY RISK: Unpredictable momentary loss of braking at low speed, in parking lots, residential streets and curves where pedestrians and other vehicles are…
NHTSA complaint #11750094 · source

Compare the 2021 Toyota Sienna Hybrid with another vehicle →

Other 2021 Toyota models

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data, as of Oct 11, 2026. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology