AI Damage2024 Toyota Sienna Hybrid: common problems
Owners of the 2024 Toyota Sienna Hybrid filed 70 complaints with NHTSA, most often about service brakes and engine. The maker issued 112 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 70
- involving a crash
- 5
- Technical service bulletins (TSB)
- 112
What fails most often
- 1 Service brakes 26% of all complaints
- 2 Engine 10% of all complaints
- 3 Vehicle speed control 10% of all complaints
- 4 Structure 9% of all complaints
- 5 Forward collision avoidance 7% of all complaints
- 6 Seats 7% of all complaints
- 7 Powertrain 6% of all complaints
- 8 Visibility 6% of all complaints
- Service brakes: 18 complaints (26% of all), 3 of them with a crash reported by the owner; manufacturer bulletins for this component: 2.
- Engine: 7 complaints (10% of all); manufacturer bulletins for this component: 12.
- Vehicle speed control: 7 complaints (10% of all), 1 of them with a crash reported by the owner.
- Structure: 6 complaints (9% of all); manufacturer bulletins for this component: 28.
- Forward collision avoidance: 5 complaints (7% of all), 3 of them with a crash reported by the owner.
Symptoms owners describe
How many of the 70 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Service brakes | 18 | 3 | 2 |
| Engine | 7 | 0 | 12 |
| Vehicle speed control | 7 | 1 | 0 |
| Structure | 6 | 0 | 28 |
| Forward collision avoidance | 5 | 3 | 0 |
| Seats | 5 | 0 | 0 |
| Powertrain | 4 | 0 | 0 |
| Visibility | 4 | 0 | 0 |
| Tires | 3 | 0 | 2 |
| Latches, locks, linkages | 3 | 0 | 0 |
| Fuel/propulsion system | 2 | 0 | 0 |
| Suspension | 2 | 0 | 0 |
| Electrical system | 1 | 0 | 31 |
| Wheels | 1 | 0 | 3 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
When he pressed on the breaks, instead of slowing down or stopping the vehicle, the brakes failed to engage, and caused a surge that compelled the vehicle to lurch forward. The lurch propelled our vehicle into collision with another vehicle. 2.
During the crash the collision avoidance system did not activate and no air bags had deployed. No injuries were reported. A police report was taken at the scene.. The failure mileage was 25,000.
No warning lights were illuminated. The contact stated the vehicle was unstoppable. The contact stated the option was to crash into the three vehicles which were coming from the opposite direction or to crash into the pole to bring the vehicle to a stop and avoid injuring pedestrians.
No warning lights pop up. All safety features on vehicles were turned on before the incident. Whats weird is the car is functioning normal now after incident. I contacted Toyota USA and waiting for feedback.
No warning lights were illuminated. The vehicle was taken to a dealer where it was diagnosed and determined that the hatchback needed to be recalibrated. The vehicle was repaired; however, the failure persisted.
I have never been in an accident in my 31 years of driving. However, I am worried that this van is going to cause me to be hit. Several times I have pulled out to make a left or right turn and my gas pedal does NOTHING. I can push it clear to the floor and NOTHING!!!
Unexplained acceleration during braking which has caused the vehicle to appear to accelerate further during braking actions causing driver to apple brakes harder
Rear Tail Lights Failed... Brake and Signals work. This was repaired through the dealership. 4 connectors and housing replaced invoice shows part [phone]2. I am writing to express my concern regarding repeated tail light failures on my black Toyota Sienna that appear to be caused by wiring connection issues.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 4,430 of 36,656 model years in the NHTSA data (top 12% most complained about).
On average one model year of the Sienna Hybrid has 82 complaints (6 years in the data). This year has 70, about average.
What to check before buying
- Service brakes. Pedal feel, ABS operation, leaks, discs and hoses.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Vehicle speed control. Accelerator pedal, cruise control, throttle codes.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- OBSOLETE NOTICE August 20, 2026
This bulletin is now obsolete. Please see T-SB-0051-26.
- This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV)…
This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries.
- Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle…
Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’…
- OBSOLETE NOTICE February 27, 2026
This bulletin is no longer applicable and is now obsolete.
- OBSOLETE NOTICE January 30, 2026
This bulletin is now obsolete. Please see T-SB-0001-26.
- Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System…
Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.
- Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a…
Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition…
- Some customers may experience a condition in which the 2021-2025 Sienna HV 2nd row FRAME SUB-ASSY, No.1…
Some customers may experience a condition in which the 2021-2025 Sienna HV 2nd row FRAME SUB-ASSY, No.1 does not function even when the stow lever is pulled. Because the cable has come off from the bracket that holds…
- Some 2024 – 2025 model year Sienna Hybrid and Sienna Hybrid MaaS Package vehicles may exhibit a condition…
Some 2024 – 2025 model year Sienna Hybrid and Sienna Hybrid MaaS Package vehicles may exhibit a condition in which the rear No. 1 seat assembly (for captain seat type) squeaks or rattles while driving. The condition(s)…
- Some 2021 – 2025 model year Sienna Hybrid vehicles may exhibit a sloshing or splashing noise from inside…
Some 2021 – 2025 model year Sienna Hybrid vehicles may exhibit a sloshing or splashing noise from inside one or more door panels when driving, opening and/or closing a door, and/or braking. This condition may be caused…
- TECHNICAL INSTRUCTIONS FOR CUSTOMER SUPPORT PROGRAM 22TE09 HV FLOOR UNDER WIRE HARNESS AND REAR TRACTION…
TECHNICAL INSTRUCTIONS FOR CUSTOMER SUPPORT PROGRAM 22TE09 HV FLOOR UNDER WIRE HARNESS AND REAR TRACTION MOTOR CABLE CORROSION CERTAIN 2021 – 2024 MODEL YEAR SIENNA HYBRID
- The air conditioning dye injection tool kit has been developed to aid in identifying the location of air…
The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and…
NHTSA lists 112 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2024 Toyota Sienna Hybrid?
Owner complaints to NHTSA most often mention: service brakes, engine, vehicle speed control. Total complaints: 70. The most frequent symptoms in complaint texts: warning lights, check engine (14%), unintended acceleration (10%), jerking, harsh shifts (6%).
How many service bulletins (TSB) were issued for the 2024 Toyota Sienna Hybrid?
NHTSA lists 112 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2024 Toyota Sienna Hybrid from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2024 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.