2017 Toyota Highlander

About a few weeks back we started noticing a whining noise while accelerating. For safety reason we are not using the truck for long distance driving. Yes, the problem was able to reproduce by an independent mechanic and confirmed. Has not been inspected by the manufacturer or any other. There are no warning lights on the dashboard.

I had been shopping, as I attempted to increase speed, my car wouldn't respond. I smelled something burning and I switched lanes because I needed a safe place to stop. I turned onto [XXX] in Pembroke (I think) and still had no forward (or backward) movement. The lower gears (D5 & D4 ) DID NOT show on the dashboard indicator. I called my husband and he came to me. Then we called AAA and had the car towed to Chichester Car Care. They couldn't fix my car. I then had it towed from Chichester Car Care to McGovern Toyota in Bow. NH. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle is a 2017 Toyota Highlander (VIN [XXX]) experiencing the UA80 8-speed transmission whine defect (T-SB-0160-18) upon acceleration. An authorized Toyota dealership test drove and officially verified the transmission failure and recommended a full replacement. However, Toyota Corporate is refusing to honor the ZJC Customer Support Program warranty extension due to an arbitrary VIN cutoff. The failing internal transmission components pose a safety risk as they can lead to harsh shifting, slipping, or a sudden loss of motive power while driving in traffic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Vehicle had history of hard shifting from 1st drive. On January 24, 2026 we heard a ringing sound as we were driving. Approximately 10 minutes after the noise began, the Check Engine light illuminated. We drove back home and connected our code reader to find P0741, P2714 and P2757. Had the vehicle towed to my Toyota Service Center and upon inspection, was informed that the transmission had failed and would require replacement. I was informed that although it was a 2017 with the UA80E manufacturered in April 2017 - it did not qualify for free replacement under Toyota. A rebuilt unit was secured and installed on 2/11/26. Toyota authorized $2000 Goodwill Assistance and their Warranty Labor Rate. I paid the remainder of the bill. The 'new' transmission also shifts hard and just doesn't feel like it it working right.

There is a known issue with the transmission in my 2017 Toyota Highlander that causes premature failure. This is noted in a Toyota Customer Support Program Bulletin. The issues symptoms are the same as those my car has: a whining noise from the transmission while driving, harsh shifting, reduced power, and master warning light/check engine light illumination. I have contacted Toyota and explained this to them, but they have told me that my car's VIN number does not match the identified vehicles. I am reaching out as I believe there are vehicles with this problem that Toyota has not identified, and it could be a dangerous issue.

DESCRIPTION OF DEFECT: My 2017 Toyota Highlander experienced a complete transmission failure under normal driving conditions. The vehicle began showing symptoms including delayed shifting, hesitation when accelerating, and eventual loss of proper drivability. The issue was diagnosed by an authorized Toyota dealership, which confirmed internal transmission failure. The estimated repair cost provided by the dealer was approximately $9,000. I opened a case with Toyota Customer Experience and submitted an escalation request, but no assistance was provided and the claim was declined or ignored. MY CAR HAD A HISTORY OF REGULAR MAINTENACE DONE BY A CERTIFIED TOYOTA DEALERS My case # :XXX Due to the urgency of transportation needs and lack of manufacturer support, I have been forced to proceed with an independent transmission replacement. Which will cost me anywhere between $6,000 and $7,500 This failure occurred without warning severe enough to prevent continued safe use of the vehicle and raises serious safety concerns regarding sudden loss of power and drivability. SAFETY IMPACT: The transmission failure caused unsafe driving conditions including hesitation during acceleration and potential loss of power while in traffic, which could increase risk of collision. ADDITIONAL INFORMATION: VIN: [XXX] Mileage at failure: 168000 Dealer diagnosis confirmed transmission failure Manufacturer case opened and escalated with no resolution I am submitting this complaint to document a potential systemic defect and to support ongoing safety investigation and consumer protection review. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

In January during an oil change i was advised that my Toyota had a timing cover leak which is a costly repair. At this time my car was at 148k. i researched it recently and found that it could be dangerous to drive with this leak that Toyota did not advise me about after i had several phone calls with their corporate office and dealership. And even though it is a common problem with their 2017 Highlander they would not take responsibility for fixing it. It was disappointing after getting all of the service recommendations done that i would have to pay $4500.00 for engine work for a seven year old vehicle. This cost was a hardship for me because I'm still making a car payment. I also had to replace the battery every 1.5 years. The battery warning light never came on, leaving me stuck at an intersection until the tow truck arrived. It cut off because of the start/ stop feature and that would not start again. No warning. And after about 15 minutes my hazard lights went dead. This is an ongoing issue.

The component that has been deemed in need of replacement is the UA80 8-speed transmission. It is available for inspection as of today's date, April 1, 2026. My and my family's safety has been put at risk of the transmission failing, especially at highway speeds. The problem was reproduced and diagnosed at both a local repair garage in Westwood, MA and the Nucar Toyota dealership in Norwood, MA. Both facilities inspected the transmission, heard a high-pitched whining noise, and determined it was irreparable and needs to be replaced. This high-pitched whining noise is a known and well-documented problem with these transmissions and needs to be included in a widespread manufacturer's recall.