AI DamageToyota Sienna: problems, complaints, bulletins
Summary for the Toyota Sienna across 7 model years: 387 owner complaints and 263 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Powertrain 20% of all complaints
- 2 Structure 14% of all complaints
- 3 Electrical system 12% of all complaints
- 4 Fuel/propulsion system 10% of all complaints
- 5 Engine 9% of all complaints
- 6 Wheels 6% of all complaints
- 7 Air bags 5% of all complaints
- 8 Service brakes 5% of all complaints
- Powertrain: 76 complaints (20% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 13.
- Structure: 56 complaints (14% of all), 2 of them with a crash reported by the owner; manufacturer bulletins for this component: 149.
- Electrical system: 47 complaints (12% of all), 3 of them with a crash reported by the owner; manufacturer bulletins for this component: 152.
- Fuel/propulsion system: 37 complaints (10% of all), 1 of them with a crash reported by the owner.
- Engine: 34 complaints (9% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 28.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2.7 L · petrol · 4 cyl 2011–2013
- 3 L · petrol · 6 cyl 1998–2003
- 3.3 L · petrol · 6 cyl 2004–2006
- 3.5 L · petrol · 6 cyl 2007–2020
- 2.5 L · hybrid · 4 cyl 2021–2026
- automatic, 4-speed 1998–2003
- automatic, 5-speed 2004–2010
- automatic, 6-speed 2011–2016
- automatic, 8-speed 2017–2020
- CVT 2021–2026
Drive: FWD, AWD
Symptoms owners describe
How many of the 387 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) |
|---|---|---|---|
| Powertrain | 76 | 1 | 13 |
| Structure | 56 | 2 | 149 |
| Electrical system | 47 | 3 | 152 |
| Fuel/propulsion system | 37 | 1 | 0 |
| Engine | 34 | 1 | 28 |
| Wheels | 24 | 0 | 9 |
| Air bags | 19 | 13 | 22 |
| Service brakes | 18 | 6 | 35 |
| Vehicle speed control | 16 | 4 | 14 |
| Fuel system | 15 | 0 | 11 |
| Visibility | 14 | 0 | 17 |
| Steering | 14 | 4 | 10 |
| Seat belts | 12 | 1 | 3 |
| Exterior lighting | 12 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The contact stated that while driving alone at 70 MPH and attempting not to hit tire tread in the road, she crashed into the median, her vehicle drove into a ditch, the vehicle spun twice, and then crashed head-on into a tree where it came to a stop.
There were no warning lights or messages prior to the incident. The airbag system has not yet been inspected or confirmed defective by a service center, but I am willing to make the vehicle available for inspection if needed.
The contact stated that the side air bags did deploy but the front air bags did not deploy vduring the accident. Medical attention was given to the contact and her family in which they were transported to the local emergency room.
The other driver collided straight into the passenger compartment door at an approximate speed of 30 mph crushing the door, exploding the window and neither the driver side airbags nor the side curtain airbags deployed.
What was concerning was the airbags did not deploy despite the significant force and high speed associated with this accident.
Had there been a fire I wouldn't be making this report! Doors need to be operable regardless of situation when none of them are jammed from an accident!
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Structure. Rails, pillars, panel gaps, signs of pulling or welding.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- OBSOLETE NOTICE January 30, 2026
- Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System…
- Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a…
- Some customers may experience echoing on the line calling the vehicle when using Bluetooth Hands Free
- The air conditioning dye injection tool kit has been developed to aid in identifying the location of air…
- To assist with the early detection and early resolution of audio related concerns you may be asked to…
- To assist with the early detection and early resolution of audio related concerns you may be asked to…
- 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…
- The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix…
- To prevent brake rotor rust from forming during transportation and storage, wheel film will be used…
- Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical…
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
Other models of this make
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 2026-11-04.