27 of the
570 complaints filed about the Toyota Sienna Hybrid
are about the driver-assist systems —
100% of everything owners reported.
The worst model year for it is 2024.
27
Complaints
100%
Share of all complaints
6
Crashes
0
Fires
Driver Assist & Collision Avoidance complaints by model year
Three (3) separate systems failed. 1. Upon seeing cars ahead of us slowing down, my husband pressed the breaks to slow down to avoid collision. 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. Also, the forward collision warning system failed to alert or engage the breaks. Our vehicle was stopped by the impact of hitting the other vehicle, not by its own breaks. 3. The automatic breaking system also failed to engage at all prior to impact.
NHTSA complaint #11759813 — an unverified report by a vehicle owner.
Three (3) separate systems failed. 1. Upon seeing cars ahead of us slowing down, my husband pressed the breaks to slow down to avoid collision. 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. Also, the forward collision warning system failed to alert or engage the breaks. Our vehicle was stopped by the impact of hitting the other vehicle, not by its own breaks. 3. The automatic breaking system also failed to engage at all prior to impact.
NHTSA complaint #11759813 — an unverified report by a vehicle owner.
I own a 2022 Toyota Sienna with approximately 67,680 miles. The vehicle began displaying warnings for **Blind Spot Monitor Malfunction, Rear Cross Traffic Alert Malfunction, and Parking Support Brake Unavailable**. A Toyota dealer diagnosed the problem and found significant corrosion at **both rear blind spot monitor connections**. The wiring harness connector pins had corroded/broken off inside the blind spot monitor sensors. The dealer recommends replacing both blind spot monitors and the rear bumper wiring harness and recalibrating the system. The estimated repair cost is **$3,945.84**. I am concerned that both sides of this safety-related system experienced severe corrosion on a vehicle that is less than five years old. These components are not scheduled maintenance or wear items. I have also found reports of other 2021–2022 Toyota Sienna owners experiencing blind spot monitoring failures involving corrosion of the rear sensor/connectors, including another 2022 Sienna at approximately 65,000 miles. Toyota's Brand Engagement Center has documented my complaint but declined to review the repair for goodwill assistance because the vehicle is outside the basic warranty and has not been serviced exclusively at Toyota dealerships. I am filing this complaint because the corrosion simultaneously disables multiple driver-assistance/safety functions and appears unusually premature. I believe NHTSA should investigate whether corrosion or inadequate protection of the rear blind spot monitor connections is affecting other 2021–2024 Toyota Siennas.
NHTSA complaint #11759229 — an unverified report by a vehicle owner.
I own a 2022 Toyota Sienna with approximately 67,680 miles. The vehicle began displaying warnings for **Blind Spot Monitor Malfunction, Rear Cross Traffic Alert Malfunction, and Parking Support Brake Unavailable**. A Toyota dealer diagnosed the problem and found significant corrosion at **both rear blind spot monitor connections**. The wiring harness connector pins had corroded/broken off inside the blind spot monitor sensors. The dealer recommends replacing both blind spot monitors and the rear bumper wiring harness and recalibrating the system. The estimated repair cost is **$3,945.84**. I am concerned that both sides of this safety-related system experienced severe corrosion on a vehicle that is less than five years old. These components are not scheduled maintenance or wear items. I have also found reports of other 2021–2022 Toyota Sienna owners experiencing blind spot monitoring failures involving corrosion of the rear sensor/connectors, including another 2022 Sienna at approximately 65,000 miles. Toyota's Brand Engagement Center has documented my complaint but declined to review the repair for goodwill assistance because the vehicle is outside the basic warranty and has not been serviced exclusively at Toyota dealerships. I am filing this complaint because the corrosion simultaneously disables multiple driver-assistance/safety functions and appears unusually premature. I believe NHTSA should investigate whether corrosion or inadequate protection of the rear blind spot monitor connections is affecting other 2021–2024 Toyota Siennas.
NHTSA complaint #11759229 — an unverified report by a vehicle owner.
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!!! Cars end up slamming on their brakes and honking at me but there's nothing I can do. This is EXTREMELY scary and a HUGE HUGE HUGE manufacturing flaw. There needs to be a recall for this to be fixed before people are injured.
NHTSA complaint #11754568 — an unverified report by a vehicle owner.
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!!! Cars end up slamming on their brakes and honking at me but there's nothing I can do. This is EXTREMELY scary and a HUGE HUGE HUGE manufacturing flaw. There needs to be a recall for this to be fixed before people are injured.
NHTSA complaint #11754568 — an unverified report by a vehicle owner.
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!!! Cars end up slamming on their brakes and honking at me but there's nothing I can do. This is EXTREMELY scary and a HUGE HUGE HUGE manufacturing flaw. There needs to be a recall for this to be fixed before people are injured.
NHTSA complaint #11754568 — an unverified report by a vehicle owner.
FAILURE: Blind spot monitor module failed due to a corroded internal electrical connector. The failure disabled both the Blind Spot Monitor (BSM) and Rear Cross-Traffic Alert (RCTA). Both remain inoperative. The failed component has not been replaced and is available for inspection. SAFETY RISK: Two active safety systems are disabled. The vehicle no longer warns of vehicles in the blind spot during lane changes, and no longer warns of cross traffic when backing out of parking spaces or driveways. WARNING LAMPS: Yes. Multiple warning lamps illuminated simultaneously in February 2026, including BSM and RCTA malfunction messages. No prior symptoms or gradual degradation. CONFIRMED BY DEALER: Yes. A Toyota dealer diagnosed the corroded connector as the cause. Repair quoted at approximately $2,500-$3,000. Repair not performed. INSPECTED BY MANUFACTURER: Diagnosed by a Toyota dealer. Goodwill assistance was requested from Toyota and declined, on the stated grounds that the vehicle had not been regularly serviced at a Toyota dealer. NOT A WEAR ITEM: A sealed electrical connector that corrodes to failure is a component defect. No step in the manufacturer's published maintenance schedule inspects, services, or protects this connector — no owner action could have prevented it, and service history has no bearing on a connector that no service procedure touches. Vehicle purchased new September 2021; failure occurred at approximately [XXX] of age. REQUEST: Request that ODI evaluate whether the BSM sensor and connector design used on this vehicle is inadequately sealed against moisture intrusion, resulting in premature failure of two active safety systems. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11750096 — an unverified report by a vehicle owner.
FAILURE: Blind spot monitor module failed due to a corroded internal electrical connector. The failure disabled both the Blind Spot Monitor (BSM) and Rear Cross-Traffic Alert (RCTA). Both remain inoperative. The failed component has not been replaced and is available for inspection. SAFETY RISK: Two active safety systems are disabled. The vehicle no longer warns of vehicles in the blind spot during lane changes, and no longer warns of cross traffic when backing out of parking spaces or driveways. WARNING LAMPS: Yes. Multiple warning lamps illuminated simultaneously in February 2026, including BSM and RCTA malfunction messages. No prior symptoms or gradual degradation. CONFIRMED BY DEALER: Yes. A Toyota dealer diagnosed the corroded connector as the cause. Repair quoted at approximately $2,500-$3,000. Repair not performed. INSPECTED BY MANUFACTURER: Diagnosed by a Toyota dealer. Goodwill assistance was requested from Toyota and declined, on the stated grounds that the vehicle had not been regularly serviced at a Toyota dealer. NOT A WEAR ITEM: A sealed electrical connector that corrodes to failure is a component defect. No step in the manufacturer's published maintenance schedule inspects, services, or protects this connector — no owner action could have prevented it, and service history has no bearing on a connector that no service procedure touches. Vehicle purchased new September 2021; failure occurred at approximately [XXX] of age. REQUEST: Request that ODI evaluate whether the BSM sensor and connector design used on this vehicle is inadequately sealed against moisture intrusion, resulting in premature failure of two active safety systems. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11750096 — an unverified report by a vehicle owner.
The Supplemental Restraint System (SRS), specifically the airbag system, is the component of concern. During a two-impact collision involving my 2025 Toyota Sienna XLE, none of the airbags deployed despite significant front-end damage that resulted in the vehicle being declared a total loss. The vehicle is currently in the possession of the insurance company or its storage facility. I do not know whether it has been released for salvage, but it may still be available for inspection. I, my wife, and our children were all wearing seatbelts at the time of the collision. After an oncoming vehicle struck the front-left portion of my vehicle while making a left turn, my vehicle lost control and collided with a concrete pillar. None of the airbags deployed during either impact. All occupants sustained injuries and were transported to the emergency department. I suffered injuries to my right leg, wrist, chest, neck and back. My wife sustained injuries to her neck, chest, back, and knee, and our children sustained injuries including head impacts. My wife and I continue to receive physical therapy. The vehicle was declared a total loss following the collision, and no dealer or independent repair facility has evaluated or reproduced the concern. The vehicle was inspected by the responding law enforcement officers at the crash scene, and a police crash report was completed. The insurance company (GEICO and Allstate Fire and Casualty) inspected the vehicle and declared it a total loss. To my knowledge, Toyota has not yet inspected the vehicle, and I do not know whether the Event Data Recorder (EDR) or Supplemental Restraint System has been analyzed. Prior to the collision, I did not observe any airbag warning lights, SRS warning messages, or other indications that there was a problem with the Supplemental Restraint System. The vehicle was operating normally before the crash.
NHTSA complaint #11747444 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
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 complaint #11745053 — an unverified report by a vehicle owner.
The contact owns a 2024 Toyota Sienna. The contact stated that while approaching a stop light and pressing the brake pedal the vehicle crashed into the rear of a second vehicle. 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.
NHTSA complaint #11739102 — an unverified report by a vehicle owner.
See attached document for complaint. My husband and I purchased a Sienna, 7-passenger van, April 2025 and have received two safety recalls, the first being the lack of second-row seats being installed correctly presenting a safety problem, and later a possible problem with the backup camera. We purchased a vehicle of that size especially for the convenience of transporting family when they visit. Also, we have a granddaughter, husband and one-year old great-grandson who live nearby and thought having a van would be helpful for trips together. Unfortunately, all our hopes were diminished at being able to enjoy the reason we purchased such an expensive vehicle, $65,000+. We are an elderly, retired couple, considered the vehicle an investment, because our two previous Toyota vehicles had lasted us for 15 years with no problems. Therefore hoping our daughter and grandchildren would be able to use the van for many years. The van has been nothing but an Albatross, not being able to drive it with only two passengers, in the front, since learning of the first recall on the second row seats. The local dealer told me if I’d get an appointment and be at their door at 7:00 a.m. they could repair the camera. BUT, dealers have no fix from Toyota for the second row seats. However, I went on line to the Toyota web site and they have a “FIX” process listed. I cannot imagine how a vehicle maker can be allowed to sell a vehicle when they find out it has such safety hazards? We consumers can beg our Legislators to pass laws to that effect, but, hope your agency will take the lead on protecting us consumers since we know this Congress will do nothing. I ask your agency to please take action on this issue and prod Toyota to do something concerning the major safety hazards with their 2025 model Sienna vans.
NHTSA complaint #11731557 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
I am reporting a recurring safety-related defect involving driver-assistance and steering-wheel controls on my 2022 Toyota Sienna Limited, VIN [XXX] ry 8, 2026, I brought the vehicle to Parkway Toyota in [XXX] bec [XXX] tion” warning appeared and cruise control stopped working. The dealer diagnosed the issue as related to the 12V battery, replaced the battery, and advised that the condition was resolved. The same malfunction later recurred. I returned to Parkway Toyota on March 18-19, 2026 for the same problem. I reported that the issue had reappeared after driving in cold conditions in Canada and that when the vehicle was warm there were no warning lights. The dealer diagnosed DTC U042381 (“invalid data received from instrument panel cluster”) and replaced the hybrid vehicle control ECU. I was told the repair was complete. Within about two days, the identical “LTA Malfunction” warning returned again and cruise control was again disabled. In addition, a broader failure then developed involving the steering-wheel-mounted controls: the steering-wheel buttons stopped responding, the instrument display became stuck on one screen and could not be changed, the cruise-control buttons stopped functioning, and the radio volume could no longer be changed from the steering wheel. This appears to be an intermittent but recurring defect affecting driver-assistance functions and vehicle controls while driving. The vehicle has now had two repair attempts for the same general condition, and the problem has not been resolved. Repairing dealer: Parkway Toyota, [XXX] . Repair dates: January 8, 2026 and March 18-19, 2026. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11729260 — an unverified report by a vehicle owner.
I am reporting a recurring safety-related defect involving driver-assistance and steering-wheel controls on my 2022 Toyota Sienna Limited, VIN [XXX] ry 8, 2026, I brought the vehicle to Parkway Toyota in [XXX] bec [XXX] tion” warning appeared and cruise control stopped working. The dealer diagnosed the issue as related to the 12V battery, replaced the battery, and advised that the condition was resolved. The same malfunction later recurred. I returned to Parkway Toyota on March 18-19, 2026 for the same problem. I reported that the issue had reappeared after driving in cold conditions in Canada and that when the vehicle was warm there were no warning lights. The dealer diagnosed DTC U042381 (“invalid data received from instrument panel cluster”) and replaced the hybrid vehicle control ECU. I was told the repair was complete. Within about two days, the identical “LTA Malfunction” warning returned again and cruise control was again disabled. In addition, a broader failure then developed involving the steering-wheel-mounted controls: the steering-wheel buttons stopped responding, the instrument display became stuck on one screen and could not be changed, the cruise-control buttons stopped functioning, and the radio volume could no longer be changed from the steering wheel. This appears to be an intermittent but recurring defect affecting driver-assistance functions and vehicle controls while driving. The vehicle has now had two repair attempts for the same general condition, and the problem has not been resolved. Repairing dealer: Parkway Toyota, [XXX] . Repair dates: January 8, 2026 and March 18-19, 2026. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11729260 — an unverified report by a vehicle owner.
"We were notified by Toyota that it was unsafe to transport our children in the second row seats in November 2025 and the vehicle was under a recall. This puts our children at risk. A letter from NHTSA stated Toyota would have a remedy by 12/6. The manufacturer (Toyota) confirmed this recall. Given that Toyota has not indicated a solution date for this and the problem was discovered in October 2025 I believe the manufacturer has failed or is unable to remedy this safety recall for our vehicle in a timely manner and would like to officially log a complaint with NHTSA.
NHTSA complaint #11723857 — an unverified report by a vehicle owner.
The contact owns a 2025 Toyota Sienna Hybrid. The contact received notifications of NHTSA Campaign Numbers: 25V744000 (Back Over Prevention) and 25V668000 (Seats); however, the parts to do the recall repairs were not yet available. The dealer was contacted and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repairs. The manufacturer was made aware of the issue. The contact had not experienced a failure.
NHTSA complaint #11717668 — an unverified report by a vehicle owner.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
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.
NHTSA complaint #11717402 — an unverified report by a vehicle owner.
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 complaint #11710701 — an unverified report by a vehicle owner.