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Power Train
04/04/2026
My transmission has started with a whining noise, Toyota knows about this issue with thousands of cases regarding the faulty transmission, yet only a few are being covered under a customer support bulletin ZJC. We need to hold Toyota responsible for this issue. We were just told today they won't help us at all. Yet now we are left with a van that we can't use and if we decide to fix it for 10k they are saying the transmission is backordered for months We had to pay Toyota $180 to diagnosis what we already knew was wrong with the vehicle so they would even consider if they would cover it.
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Engine
02/10/2026
Whining noise upon acceleration
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Power Train
07/25/2025
In July of 2025 my 2017 Sienna started making a whine noise. Took it to mechanic and he stated it was likely coming from transmission but recommended we take it to Toyota dealership to confirm. So we took it to Toyota and sure enough they said the transmission was failing. They said it was due to high mileage but it only had just over 150,000 at time of incident. After doing some research on line and talking with other Sienna owners I believe our Sienna should fall under the UA-80 recall.
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Power Train
02/01/2026
The transmission started making a whining sound. There is a Toyota customer support bulletin pol19-04 that mentions this issue however the dealer says this car is not covered
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Power Train
01/20/2026
The contact owns a 2017 Toyota Sienna. The contact stated that while starting the vehicle, reversing, and then while driving 20 MPH, there was an abnormal whining sound coming from the front of the vehicle. A dealer was contacted. The vehicle was taken to the dealer and was currently being diagnosed. The vehicle was not repaired. The contact related the failure to Technical Service Bulletin: TSB-0160-18 (Transaxle Whine Noise, Harsh Shift, MIL ON, or Reduced Power); however, the VIN was not included in the bulletin. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was 120,000.
