Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 11 of 38 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Power Train. Review the 8 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Electrical System. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Engine. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
0 crash reports1 fire reports0 injury reports
What owners actually said
38 reports
60,000 miles · Nov 22, 2024
Electrical System
The contact owns a 2020 Toyota Sienna. The contact stated that while his wife was driving at an undisclosed speed, the pre collision, lane assist, and air bag warning lights illuminated on the instrument panel. The vehicle was taken to a dealer and a fuse in the ECU (Electronic Control Unit) was replaced; however, the contact st…
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The contact owns a 2020 Toyota Sienna. The contact stated that while his wife was driving at an undisclosed speed, the pre collision, lane assist, and air bag warning lights illuminated on the instrument panel. The vehicle was taken to a dealer and a fuse in the ECU (Electronic Control Unit) was replaced; however, the contact stated that approximately 10 days later, the failure recurred. The vehicle was taken back to the dealer where the vehicle remained for almost two weeks. The contact was informed that the wiring harness needed to be replaced; however, the wiring harness was on backorder. The manufacturer was notified of the failure, but no additional assistance was provided. The contact was provided a case number. The vehicle was not repaired. The failure mileage was approximately 60,000.
NHTSA ODI #11626786
Mileage unknown · Aug 11, 2024
Structure
Hinge rust on fuel door causing it to break and not let rear passenger door auto open (because switch won't make up) hinge is very weakly built
NHTSA ODI #11607833
Mileage unknown · Jul 15, 2024
Unknown Or Other
Sun roof leaking or clogging causing water to get inside vehicle. Causing extensive damages and malfunctions
NHTSA ODI #11602345
Mileage unknown · Apr 5, 2024
Electrical System
Spontaneous and random: Blinkers come on, radio volume goes up or down when turning the other way, CarPlay USB shuts off and on, hiccups when accelerating (when ECO kicks on/in)…everything points to an electrical/computer issue. Purchased used from a dealership and noticed these issues after the 3-day return window.
NHTSA ODI #11581325
Mileage unknown · Apr 4, 2024
Electrical System
Speakers make an ear piercing loud noise that lasts about a second. If this sound were to occur during travel, could cause distraction leading to harm, or with young kids in the car, possibly damage their ears. This problem has been random and not experienced by a dealership. No warning messages or symptoms to the problem. Probl…
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Speakers make an ear piercing loud noise that lasts about a second. If this sound were to occur during travel, could cause distraction leading to harm, or with young kids in the car, possibly damage their ears. This problem has been random and not experienced by a dealership. No warning messages or symptoms to the problem. Problem first appeared 6 months ago.
NHTSA ODI #11581181
Mileage unknown · Jan 7, 2024
Structure
The passenger side rear door unlocked and opened by itself in the middle of the night, no warning messages were given previously, doors were locked that night. Keys were not accidentally pressed on. It seems that others have had similar problems with Toyota Siennas in the past as well.
NHTSA ODI #11563987
Mileage unknown · Sep 29, 2023
Steering
The contact owns a 2020 Toyota Sienna. The contact stated while driving at various speeds, the vehicle lost power steering assist. Additionally, the "Check Vehicle Stability Control System", "Pre-Collision System Malfunction", and "Lane Departure Alert" messages were displayed. The vehicle was initially taken to an independent m…
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The contact owns a 2020 Toyota Sienna. The contact stated while driving at various speeds, the vehicle lost power steering assist. Additionally, the "Check Vehicle Stability Control System", "Pre-Collision System Malfunction", and "Lane Departure Alert" messages were displayed. The vehicle was initially taken to an independent mechanic where the rack and pinion was replaced; however, the failure persisted. The dealer was then notified of the failure and informed the contact that there were no open recalls on the VIN. Upon investigation, the contact discovered NHTSA Campaign Number: 19V532000 (Steering) which he linked to the failure. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was unknown.
NHTSA ODI #11547302
Mileage unknown · Aug 22, 2023
Service Brakes
The brake peddle is too small, it feels like my foot is going to come off of it or miss it. Some time's I lose a second or two trying to locate it with my foot, very frightening, and dangerous Every vehicle I have ever owned had a brake peddle twice that size. Yes it's a mini van, but the brake peddle does not need to be …
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The brake peddle is too small, it feels like my foot is going to come off of it or miss it. Some time's I lose a second or two trying to locate it with my foot, very frightening, and dangerous Every vehicle I have ever owned had a brake peddle twice that size. Yes it's a mini van, but the brake peddle does not need to be mini. This vehicle can carry 8 adults with lots of extra room, it should not even be classified a mini van. The brake peddle is less then 4 inches wide. Please look into this dangerous issue. Photos attached.
NHTSA ODI #11539977
Mileage unknown · Aug 7, 2023
Unknown Or Other
I came to sellers home to look at his van. His ad said mileage was 77k and odometer also read 77k. When I ran the Carfax, I noticed CA DMV registered title at 143k. Seller admitted to replacing dashboard when confronted. Address of seller is [XXX] . I don't have a name. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION…
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I came to sellers home to look at his van. His ad said mileage was 77k and odometer also read 77k. When I ran the Carfax, I noticed CA DMV registered title at 143k. Seller admitted to replacing dashboard when confronted. Address of seller is [XXX] . I don't have a name. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA ODI #11536966
28,000 miles · Jul 28, 2023
Service Brakes, Air
The contact owns a 2020 Toyota Sienna. The contact stated while driving approximately 15 MPH and making a turn, the brake pedal was depressed, and the vehicle skidded. The ABS warning light was illuminated. There was an abnormal sound coming from the vehicle. The vehicle was taken to the local dealer, where it was diagnosed that…
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The contact owns a 2020 Toyota Sienna. The contact stated while driving approximately 15 MPH and making a turn, the brake pedal was depressed, and the vehicle skidded. The ABS warning light was illuminated. There was an abnormal sound coming from the vehicle. The vehicle was taken to the local dealer, where it was diagnosed that there was a speed sensor short circuit on the front passenger’s side, and that the brake actuator was fractured. The vehicle was not repaired due to parts not being available. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 28,000. The VIN was not available.
Consequence: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.
Remedy: Toyota will notify owners, and dealers will replace the fuel pump assembly with an improved one, free of charge. Owners of specific models were notified that remedy parts were available starting January 21, 2021. Owners of other models will be notified as remedy parts become available. Remedy parts should be available for all affected vehicles by late March 2021. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Note: This recall is an expansion of recall 20V-012. Toyota's number for this recall is 20TA02. Lexus' number for this recall is 20LA01.
Braun Corporation (Braun) is recalling certain modified 2017-2020 Toyota Sienna vehicles. The steering shaft extensions may have been improperly manufactured, possibly causing the extensions to fracture.
Consequence & remedy
Consequence: If the steering shaft extension completely fractures, it can cause a loss of steering, increasing the risk of a crash.
Remedy: Braun has notified owners, and dealers will replace the steering shaft extensions, free of charge. The recall began July 25, 2019. Owners may contact Braun customer service at 1-800-488-0359.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0
No exact-year investigations in this snapshot.
2020 Toyota Sienna Problems, Complaints & Recalls | Skip That Year