2026 Toyota Sienna Hybrid Owner Complaints

On [XXX], a nearly new 2026 Toyota Sienna XLE AWD with approximately 3,869 miles displayed hybrid-system malfunction, overheating, and check-engine warnings while traveling near Marriottsville, Maryland, at night. The vehicle could not continue safely and had to be towed through Toyota Roadside Assistance, stranding our family and passengers. DARCARS Toyota of Frederick subsequently inspected it and documented multiple punctures and coolant leakage in the inverter radiator on repair order [XXX]. The dealer attributed the punctures to outside influence or road debris, denied factory-warranty coverage, and replaced the inverter radiator and grille. The vehicle remained out of service until [XXX]. I am concerned that the location or protection of this critical hybrid cooling component may leave it vulnerable to ordinary road debris, resulting in coolant loss and sudden interruption of travel. I request review of whether this is a wider safety issue affecting Sienna vehicles. I have repair documentation and can provide it on request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11775479

Incident

Oct 16, 2026

I am filing this complaint regarding an outstanding safety recall affecting my 2026 Toyota Sienna Limited, purchased in May 2026. The vehicle is subject to an open safety recall for which Toyota has not yet provided an available remedy. I have been advised by Toyota Corporate NOT to use the affected second row seating position due to the safety concern. This is particularly concerning because I purchased a three row minivan specifically to safely transport my family, including my three young children, all of whom require car seats. The second row seating configuration is essential to safely and practically transporting my children. As a result of this unresolved recall, I am unable to safely use a passenger seating position in a vehicle I purchased only months ago. There is currently no repair available, no definitive timeline for a remedy, and no resolution to this significant safety and usability issue. I have contacted Toyota Corporate and opened a case regarding this matter. I am also working with the dealership to address the situation. I am requesting that NHTSA review this outstanding safety recall, Toyota’s lack of an available remedy, and the impact on vehicle owners who have been instructed not to use an affected seating position. I am concerned about the safety of my family and believe Toyota needs to provide a timely and effective remedy for this defect as well as a comparable means of transportation in the interim.

NHTSA ID

11775337

Incident

Oct 20, 2026

All of moldings at the doors and passenger side mirror was melted. Dealership didn't help and Toyota brend management will not help us.

NHTSA ID

11775231

Incident

Oct 1, 2026

The contact owns a 2026 Toyota Sienna Hybrid. The contact received a recall letter for Manufacturer Recall Number: 26TB24/NHTSA Campaign Number: (Awaiting). The local dealer was contacted and confirmed that parts were not yet available. The dealer declined to provide a loaner vehicle. The manufacturer was contacted and advised the contact that loaner vehicles were provided at the discretion of the dealer, and no additional assistance was provided.

NHTSA ID

11772707

Incident

Oct 21, 2026

"The factory backup camera on my brand-new 2026 Toyota Sienna has a critically low resolution, resulting in a deeply blurry and pixelated image. The video feed is also heavily letterboxed into a tiny box in the middle of the large 12.3-inch screen. This poor quality and tiny layout severely restrict visibility, making it dangerous to spot pedestrians or small kids when backing out of driveways. Toyota Corporate confirmed this is a universal design choice, meaning it is a model-wide defect creating an active safety hazard." Very dangerous, it needs to be updated.

NHTSA ID

11770909

Incident

Aug 8, 2026

We have been to the dealer 3 separate times for our ac not properly cooling. And also no air flow through out the van. As well as the rear driver passenger door button doesnt open all the time.

NHTSA ID

11769908

Incident

Jul 10, 2026

The factory backup camera on my brand-new 2026 Toyota Sienna has a critically low resolution, resulting in a deeply blurry and pixelated image. The video feed is also heavily letterboxed into a tiny box in the middle of the large 12.3-inch screen. This poor quality and tiny layout severely restrict visibility, making it dangerous to spot pedestrians or small kids when backing out of driveways. Toyota Corporate confirmed this is a universal design choice, meaning it is a model-wide defect creating an active safety hazard.

NHTSA ID

11769787

Incident

Sep 10, 2026

The factory-installed backup camera on my brand-new 2026 Toyota Sienna XSE has a critically low resolution, resulting in a deeply blurry, fuzzy, and pixelated image. Furthermore, the video feed is heavily letterboxed into a small rectangle in the middle of the large 12.3-inch screen. This poor image quality and tiny layout severely restrict rearward visibility, making it dangerous to spot pedestrians, obstacles, or small children when backing out of driveways. A local Toyota dealership inspected the system and confirmed it is operating 'as designed' by the factory, meaning this is a universal design defect on the vehicle model that creates a significant safety hazard.

NHTSA ID

11769045

Incident

Sep 10, 2026

The contact owns a 2026 Toyota Sienna Hybrid. The contact stated that while the vehicle was occupied and parked in the driveway, the sunroof exploded outward without impact. The sunroof shade was closed during the failure. There was no reported injury. The vehicle was taken to a dealer, where the contact was informed that a similar failure was previously reported; however, the failure was not covered under warranty. The vehicle was not diagnosed or repaired. The dealer referred the contact to the manufacturer, who then referred the contact to the sunroof glass manufacturer for assistance. The sunroof glass manufacturer informed the contact that the vehicle manufacturer was responsible for the repair because the sunroof glass was installed on the vehicle. The failure mileage was approximately 2,000. The VIN was unavailable.

NHTSA ID

11755212

Incident

Jul 31, 2026

Mileage

2,000 mi

The contact owns a 2026 Toyota Sienna. The contact stated that while driving at 35 MPH, an abnormal, shattering sound emitted from the vehicle. The contact immediately pulled over and discovered that the rear window had shattered without incident as glass debris had spread all over the truck of the vehicle. The contact was able to flag down a police officer in the area who assisted the contact with the failure. A police report was not filed as no evidence of a crime or nefarious dealing was discovered. The contact managed to drive the vehicle home to drop off her granddaughters and drove the vehicle to the dealer. The dealer inspected the vehicle and stated that the windshield failure was caused by an unknown impact which the contact disputes. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired and remained in the dealer's possession. The failure mileage was approximately 3,000.

NHTSA ID

11753280

Incident

Jul 25, 2026

Mileage

3,000 mi

Seat height not adjusting is ludicrous and a hazard! My husband is 6'4", my sons, 6'1", they seat height is not safe and braking/turns cause them to hit their heads. This could be life threatening in a real accident. There should be a lower profile seat that could be installed by Toyota. This is not safe!

NHTSA ID

11751678

Incident

Jul 20, 2026

Van doors sensors not functioning correctly. Child was in the way and got pinned between doors. The door didn’t stop when it touched the child, cont to close with the child in the way. Child ended up with a bruise on right thigh. The door had to manually be pulled back off of the child..

NHTSA ID

11749806

Incident

Feb 11, 2026

While driving my new 2026 Toyota Sienna Woodland Edition home from the dealership on the day of purchase (XXX), I applied routine braking to stop at a yellow light. Both second-row captain's chairs, which had been slid fully rearward and left in the upright position during the dealer's cargo-space demo, and which I assumed had been properly locked, suddenly slammed forward with extreme force into the back of the front seats, and the seatbacks self-folded on impact. Notably, both chairs failed identically and simultaneously, which suggests a systemic design or manufacturing issue rather than an isolated event. Had a person or object been positioned between the chairs and the front seats, they would have been struck or crushed; any item on top of the chairs could have become airborne. My canvas bag in the cargo area was compressed by the force. Summary: the seats appeared to fail to latch/lock securely in their rearward track position. After the incident I was unable to move or release the chairs from the collapsed position, though this could have been due to my own lack of expertise on how to operate the chairs. No injuries occurred because the seats were unoccupied at the time, but this presents a serious injury risk to occupants under normal braking conditions. On XXX I took the vehicle to a second dealership, Bev Smith Toyota in [XXX], for inspection. The tech's video and resulting service invoice incorrectly claimed the seats were "unlocked" and not in the upright position at the time of the incident, stating "No problem found." I disputed this in writing, since the seats were indeed upright. I asked Bev Smith to conduct a safety test drive but the invoice does not show this was done. I asked for a demo of the seats and was shown how to lock and confirm stability, a step the average consumer might skip entirely, simply pulling the seats back and assuming they were latched, as Palm Beach Toyota had done. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11748875

Incident

Jul 3, 2026

Less than 1000 miles on my car i do not remember exact dates hence i have added todays date for incident date.All three incident happend in three different days. Scenario 1 two times. Scenario 2 one time --- SCENARIO 1: Curved Road / No Lane Markings --- Conditions: ACC set at 25 MPH on an undivided two-way road with no lane markings. Parked vehicles present at curves; oncoming traffic at safe distance. Issue: On two separate occasions, the vehicle applied sudden, significant braking without driver input while navigating curves. No imminent collision risk existed. The abrupt speed reduction created a rear-end hazard from following traffic. Reported to Toyota support: YES --- SCENARIO 2: Michigan Left Turn Lane / 40 MPH --- Conditions: ACC active at 40 MPH on a multi-lane road with a dedicated Michigan Left turn lane. Forward path in my lane was clear. Issue: A vehicle ahead moved into the Michigan Left turn lane and began decelerating. As my vehicle accelerated (path now clear) and was still slightly behind — approaching but not yet parallel to — the turning vehicle, the system applied brief unexpected braking. The turning vehicle then moved further forward to complete its Michigan Left maneuver ; my vehicle resumed normal speed when some diagonal distance had been seen. Reported to Toyota support: NO ACTION REQUESTED: Investigate whether Toyota Sienna's PCS/ACC (1) miscalibrates object detection on unmarked curved roads and (2) fails to distinguish lateral vehicles from forward obstacles. Software update or remedy may be warranted.

NHTSA ID

11745053

Incident

Jun 18, 2026

The center console between the front seats has a design defect. When small objects such as a credit card, key fob, or coin are left on the flat surface of the console, they can slip through a gap into the internal storage compartment. Once inside, the object becomes lodged and physically blocks the console lid from opening, locking the owner out of the storage compartment. The console must be partially disassembled to retrieve the object. This is a design flaw, not operator misuse. The flat surface visually appears usable, and the owner's manual does not warn against placing objects there. This defect is widely reported in the "Toyota Sienna 2025+" Facebook group (the largest online community of current Sienna owners), where multiple owners report the same problem. The defect is therefore not isolated. The vehicle was purchased new on 01/22/2026 from Nourse Toyota. The dealer declined to repair and referred me to Toyota. Toyota Customer Experience (Case ID XXX, contact: [XXX], 06/04/2026) declined to offer a remedy. On 06/10/2026, the Toyota Brand Engagement Center (Case #XXX) confirmed in writing that no recall or Customer Support Program covers this issue, and that the diagnosis does not indicate a manufacturer defect. No warning lamps or messages appeared. The defect is mechanical. I request NHTSA review this defect for investigation and potential recall action. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11743184

Incident

May 1, 2026

While slowing to a stop sign at a normal speed, the 3rd row, which does not lock into place, flew into the upright position. Thankfully it had nothing on top of it, but if it did my children in the second row would have been seriously injured.

NHTSA ID

11741192

Incident

May 30, 2026

The contact owns a 2026 Toyota Sienna. The contact stated while driving at an undisclosed speed, the rear window glass shattered. No warning lights were illuminated. The vehicle was taken back to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 6,442.

NHTSA ID

11734941

Incident

Apr 30, 2026

Mileage

6,442 mi

The sun roof glass spontaneously combusted

NHTSA ID

11734127

Incident

Apr 27, 2026

2dark areas on driver's side with low beams on. Very distracting when driving and almost hit road debris not visible due to dark areas. Having this as a standard feature on lights is dangerous for driving at night.

NHTSA ID

11734119

Incident

Nov 24, 2025

The back up camera freezes. It will show old image not the live image. This creates a safety hazard when parking and reversing in school around kids and other people.

NHTSA ID

11710701

Incident

Jan 13, 2026

This minivan has the entertainment system, when using the TV screen, it blocks the rearview mirror where you are unable to see out of the back window. I have not seen any warning labels. I am unsure if it has been inspected by the manufacturer, and police and insurance reps have not inspected mine.

NHTSA ID

11704150

Incident

Dec 10, 2025