Total Complaints
32 filings
TOYOTA SIENNA HYBRID · model year
32 NHTSA complaints, and 2 active recalls for this specific cohort.
NHTSA overall rating
5 / 5 ★
New Car Assessment Program
The 2021TOYOTASIENNA HYBRID carries 32 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 0 crashes, 0 fires, 3 injuries, and 0 fatalities. For crash performance, NHTSA's New Car Assessment Program gave this cohort an overall 5/5 rating, with 4/5 front crash, 5/5 side crash, and 4/5 rollover scores derived from standardized barrier and dynamic tests.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2021 SIENNA HYBRID is air bags with 10 filings, followed by visibility/wiper (4) and seats (3). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 2 active recall campaigns, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.
NHTSA currently has 51 investigation files overlapping the 2021 SIENNA HYBRID, and 1 remain open. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
32 filings
Crashes Reported
0 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| AIR BAGS | 10 |
| VISIBILITY/WIPER | 4 |
| SEATS | 3 |
| SERVICE BRAKES | 2 |
| EXTERIOR LIGHTING | 2 |
| ENGINE | 1 |
| STRUCTURE:BODY | 1 |
| VISIBILITY:REARVIEW MIRRORS/DEVICES | 1 |
| LATCHES/LOCKS/LINKAGES:DOORS:LATCH | 1 |
| SERVICE BRAKES, HYDRAULIC | 1 |
| TIRES | 1 |
| STRUCTURE:BODY:HATCHBACK/LIFTGATE:SUPPORT DEVICE/STRUT | 1 |
| STRUCTURE:BODY:DOOR | 1 |
| ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE | 1 |
| POWER TRAIN | 1 |
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 cir
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
The car jerks when coming to a stop. Like when the regenerative system is disengaged it jerks. For the Adaptive cruise control the car will accelerate instead of braking when another car merges in front of you.
The car jerks when coming to a stop. Like when the regenerative system is disengaged it jerks. For the Adaptive cruise control the car will accelerate instead of braking when another car merges in front of you.
The car jerks when coming to a stop. Like when the regenerative system is disengaged it jerks. For the Adaptive cruise control the car will accelerate instead of braking when another car merges in front of you.
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags). Upon contacting the local dealer, the contact was informed that the parts for the recall repair were on backorder. The contact had not experienced a failure related to the recall. The manufacturer had not been contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (AIR BAGS); however, the part to do the recall repair was not yet available. The contact stated that the SRS warning light was illuminated. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The failure mileage was unknown. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact stated that while the vehicle was parked, the contact observed a melted spot, almost identical on the driverâs and front passengerâs lower back rest on the seats. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure. The failure mileage was approximately 60,000.
Mileage: 60,000
The contact owns a 2021 Toyota Sienna Hybrid. The contact stated that while driving at an undisclosed speed, there was an abnormal rattling sound coming from the second-row seats. The message to "Check Rear Seats" was displayed. No warning lights were illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 25V086000 (Seats); the VIN was included, and the vehicle was repaired. However, the contact was informed that the remedy was for the third-row seat only. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline to report the failure. The failure mileage was 169,000.
Mileage: 169,000
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact was notified of NHTSA Campaign Number: 23V865000 (Air Bags); however, the part to do the recall repair was not yet available. The local dealer was made aware of the issue and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (AIR BAGS); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact stated that the vehicle was experiencing inaccurate fuel gauge readings. The contact stated while starting the vehicle, the fuel gauge reading displayed that the fuel tank was empty; however, while the contact was attempting to refuel the vehicle at the gas station, she became aware that the fuel tank was not empty and that there was sufficient fuel in the vehicle. The vehicle was taken to the CarMax dealer, where it was driven and refueled several times; however, the failure could not be replicated. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 50,300.
Mileage: 50,300
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags) however, the part to do the recall repair was not yet available. The local dealer was not contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna Hybrid. The contact stated that while driving at an undisclosed speed, the contact heard an abnormal splashing sound inside the vehicle. The contact stated that while the vehicle was parked, there was water coming from underneath the doors. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The contact related the failure to Technical Service Bulletin: 0121-20 (Sloshing or Splashing Noise Caused by Water Inside Doors); however, the vehicle was not covered under the TSB. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 22,500.
Mileage: 22,500
The contact owns a 2021 Toyota Sienna Hybrid. The contact stated that after pressing the rear lift gate button, the rear liftgate door failed to open, trapping the dog inside the vehicle. The contact stated that the rear liftgate door was later manually forced open by two good Samaritans and the dog was retrieved. The vehicle was later taken to the local dealer who diagnosed that the failure was caused by a faulty passengerâs side liftgate strut bolt. The liftgate strut and bolt were replaced and the vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 67,000.
Mileage: 67,000
The contact owns a 2021 Toyota Sienna Hybrid. The contact received notification of NHTSA Campaign Number: 23V865000 (Air Bags) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
The contact owns a 2021 Toyota Sienna equipped with Cooper Tires, Tire Line: Discoverer True North, Tire Size: 235/35/R17, DOT Number: RN811KW1322. The contact stated while his wife was driving approximately 65 MPH, the front driver's side tire sustained a blowout. Upon inspection, it was discovered that the sidewall of the tire had failed. The cause of the failure was not yet determined. The contact stated that prior to the failure, the tire was taken to the local dealer regarding slight bulging on the sidewalls, but the contact was informed that the tires were safe for driving. The manufacturer was not contacted. The failure mileage was 37,000.
Mileage: 37,000
The contact owns a 2021 Toyota Sienna Hybrid. The contact stated that while depressing the brake pedal, there was a three-second delay before the brakes would respond. Additionally, the brake pedal was difficult to depress, creating an extended stopping distance. The vehicle was taken to the local dealer who adjusted the brake stroke sensor and recalibrated the braking system; however, the failure persisted. The vehicle was later taken to a second dealer who bled the brake lines, but the failure persisted. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 30,800. The VIN was not available.
Mileage: 30,800
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.