2017 Toyota Sienna

I am writing to report a significant safety issue with my vehicle involving a leaking sunroof that is causing damage to both the seatbelts and airbags. I believe this issue poses a serious safety concern and could lead to malfunctioning safety systems during an accident. I asked my local Toyota dealership for guidance adn they told me to clean the drain tubes out with weed eater wire. We tried that and the drains were working fine. If that did not work, it would be 3-5 thousand dollars to fix it. I have reported this issue to Toyota cooperate, but they are not willing to acknowledge the issue because of the year and miles on my van. There are several other Toyota Sienna van owner that have experienced the same problem and yet a recall has not been issued. This is my family vehicle that I drive my young kids around in. I feel that Toyota is willing to put my family's safety on the line by not acknowledging this on going issue. Issue: The sunroof in my vehicle has developed a leak over the past year that continues to get worse. The leak is allowing water to enter the cabin during rain. The water appears to be collecting around the area where the sunroof is installed and is dripping onto the headliner, seatbelts, and side airbags. It soaks my driver and passenger seatbelts for days. Damage: Over time, this leak has caused visible deterioration to the seatbelts, as they are getting wet and showing signs of wear. Additionally, the airbags may be at risk, as moisture could affect their proper deployment during an accident. I am concerned that the presence of moisture may result in these safety features malfunctioning when needed most. This could potentially be a fatal issue.

While driving our vehicle on the highway, the check engine light suddenly came on and traction control turned off. Within moments, the vehicle began to stall and would not accelerate. My wife and children were in the car and we were nearly hit by another vehicle as she struggled to get the car to safety. It was a terrifying experience that put my entire family in danger, along with everyone else on the highway. Upon taking the car to the dealership, we were told the transmission failed and would need to be replaced.

The contact owns a 2017 Toyota Sienna. The contact stated that while driving at an undisclosed speed and attempting to accelerate, the vehicle briefly hesitated before shifting hard into gear. The contact stated that after the failure, there was an abnormal whining sound coming from underneath the vehicle. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who was unable to provide a specific diagnosis for the cause of the failure; however, the contact was informed that there were known issues with the transmission of similar vehicles. The vehicle was not repaired. After investigating the failure, the contact related the failure to the Customer Support Program Bulletin: ZJC. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 40,000.

The contact owns a 2017 Toyota Sienna. The contact stated that occasionally while driving approximately 35 MPH, the vehicle lost automotive power before jolting forward. There was an unknown warning light illuminated. In addition, the contact stated that the failure had progressed over time. The vehicle was taken to a local independent mechanic; however, the cause of the failure was unknown. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 69,000.

My 2017 Toyota sienna has a whine noise coming from the transmission. Brought it to the dealer I have done everything at for this van and they say it’s the transmission and it will cost more than it’s worth. There’s a CSP-zjc but my vin isn’t on there. It’s presenting the same exact problem as the CSP. Unbelievably, Toyota CARES isn’t doing a “good will” service fix. Very disappointed in their customer service

My transmission (UA80e) has started to steady whining noise when driving and has some choppiness when changing gears. The local Toyota dealership is recommending full replacement, the dealership said it is out of warranty. Toyota headquarters released a Customer Support Bulletin ZJC in 2019 covering this issue for the next 10 years, but they are saying they will not cover it under this bulletin even though my model year, transmission and symptoms all match the described issue.

We have started to experience the transmission whine at that is specified in Toyota's CSP ZJC documentation. We took our vehicle into our local Toyota Dealership Service Center and they confirmed that the whine was a transmission issue and that the only course of action to take would be to replace the transmission. Our vehicle was manufactured in the specified window (manufacture date 10/2016, manufacture data window from the program 7/2016-2/2018), it has the specified transmission model (UA80), we are within the coverage window stated in the support materials (within ten years of first use), we are experiencing the same transmission symptoms described in the program support materials (whining transmission noise), and we have been recommended by our local Toyota Service members to replace the transmission. From this information, it appears that we meet the criteria and are suffering the same issues as are referenced in the ZJC materials, but our VIN is not included in the program. I believe that is an error and the program should be expanded.

The contact owned a 2017 Toyota Sienna. 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. The driver's side air bags did not deploy, but the passenger air bags deployed when there was no occupant seated. The contact sustained neck and back injuries, and medical attention was sought via the hospital. A police report was filed, but it was not available at this time. The vehicle was towed to a tow lot. The manufacturer was not notified of the failure. The failure mileage was 216,000.

October of 2024 my van stalled while I was driving. The van was towed to an auto shop. The shop suspected a battery & alternator so replaced it. Later that same week I filled my tank at Delta Sonic and immediately proceeded to the car wash. My van stalled in the car wash. Once I was pushed out I had it towed again. I drove it for a few weeks and filled up the tank at Delta Sonic but this time the van didn’t start at all. Towed the van again. Shop thinks my issue is resolved- did a complete check of everything & returned my van to me. A week or so goes by and I filled my tank late at night and it wouldn’t start after fill up. A tow was not available. Scared and frustrated I called multiple people for help. Two hours pass, before I try to start the van again. It starts. Now I am starting to correlate a fuel fill up with my van not starting after re-fueling. My safety and my grandchild’s safety was jeopardized when my van stalled while driving in an extremely busy roadway. The next time, Multiple people had to push me out of the car wash and the last time I was forced to sit at gas pumps waiting for help. I stop filling my tank to full and take the van to Toyota. They confirmed the fuel pump was the issue and fixed it.