2018 Toyota Highlander

My transmission had to be replaced at 30,000 miles and a year and two weeks later it needs replaced again at 42000 miles. Toyota will only cover 1/2 the replacement the second time and nothing the first.

I took my car in to the dealer for a noticable hum sound that was staying to occur. UA80 transmission model has been determined to be failing by the dealership that I took it to. They determined there's metal flakes showing in the fluid.

The contact owns a 2018 Toyota Highlander. The contact stated that while driving 75 MPH, there was an audible chime followed by the message "Transmission Overheating". The vehicle started jerking and hesitating while depressing the accelerator pedal. Additionally, there was a burning odor coming from the vehicle. Due to the failure, the contact pulled off the highway and allowed the transmission to cool down. The vehicle was restarted, and the message disappeared; however, the vehicle continued to hesitate while depressing the accelerator pedal. The contact continued driving 70 MPH, and the transmission message displayed again. The vehicle was then taken to a dealer, and the failure was associated with Customer Support Program: ZJC. The contact was informed that the vehicle was not included in the program. The manufacturer was notified of the failure, and the contact was provided a case number. The manufacturer confirmed that the vehicle was not included in the CSP. The failure mileage was approximately 130,000.

I would like to report a transmission problem with my 2018 Toyota Highlander XLE which I purchased in XXX with 108,000 miles. Since about mid-XXX it has been making a noticeable whine under acceleration in the speed range of about 35-50 mph. I had the noise diagnosed on XXX at the Toyota of [XXX] dealership; they confirmed it and said it cannot be fixed except to replace the entire transmission at a cost of $9900 (estimate attached). I also called the national Toyota customer service center and was told there is no recall, customer support program, or warranty extension available for my vehicle. It is a UA80F (AWD) transmission which have a history of failing prematurely in a variety of Toyota vehicle models, beginning with the whining noise and progressing to grinding and mis-shifting before failing completely. Although my transmission is still functioning adequately despite the whining noise, I am concerned that it may break down well before the expected lifespan of the vehicle. In financial terms, the repair cost is quite onerous and the resale value is now substantially less than it should be. The biggest concern is that it could cause a safety hazard if a failure occurred in conditions such as extreme hot or cold weather, remote or hilly or curvy terrain, or while driving in busy highway speed traffic. As such, I believe that Toyota should bear the responsibility to address these transmission issues and a recall should be issued. Thanks for your consideration. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Whining noise in the transmission

whining sound in the transmission, including high-pitched whining, erratic shifting, clunks, hesitation, and premature failure. These vehicles are equipped with the UA80F (AWD) and UA80E (FWD) 8-speed automatic transmissions.

Transmission failure happened suddenly. I pulled out of a car wash and car would not accelerate. I was in heavy traffic and car wouldn’t move.

The position of the screen monitor for the backup camera is hard to see when the sun creates a glare on the front windshield.

The Pre-Collision System (PCS) failed to engage the automatic emergency braking during a stop-and-go traffic, thereby, resulting in rear-ending the vehicle ahead of our 2018 Highlander Limited vehicle. Our Highlander was at a complete stop, then when the traffic moved slowly forward, we too started moving forward but didn't realize the vehicle ahead of us had suddenly stopped again. Our Highlander alerted us with high-pitched beep-beep-beep sound, but it didn't stop before colliding with the rear of the vehicle ahead of us. The speed couldn't have been more than 10 MPH since it started out from a complete stop and the distance traveled before the collision was about 40 feet. There were no warning lamps, messages or other symptoms of the problem prior to the collision. It always beeped, like it should, when there were nearby obstacles, pedestrians, and when we got closer to the end of our garage parking space, etc. PCS sensitivity was set at the highest level (3 bars).

Vehicle has a high pitch whine on acceleration. Was diagnosed by Toyota dealer. Advised to replace the transmission. This VIN is not included in the CSP ZJC warranty but is a 2018 and is experiencing the same issue. Sound began at 110k miles.

GUEST STATES HER VEHICLE IS WHINING DURING ACCELLERATION, WILL STOP WHINING FOR A MOMENT WHEN VEHICLE UPSHIFTS AND THEN RETURN. GUEST HAS BEEN IN CONTACT WITH SERVICE MANAGER. NOISE CONFIRMED IN DRIVETRAIN, NOTED SUBLT BUT IT DOES OCCURE TEST DROVE ON BACK HILL. PLEASE HAVE CHECKED ADVISE. Comments: Verified reported sound. Like make and model comparison vehicle did not exhibit sound. Traced source of sound to transmission. Replacement of transmission needed to address reported sound. Warranty company sent independent inspector out, warranty company approved replacement with OEM remanufactured transmission. Car has been at dealer for since July 18, 2026 (1 month and counting) and still waiting for replacement transmission to be available from Toyota. Repair Estimate: $9681.80 Original Approved: $0.00 TOTAL APPROVED: $9681.80

This vehicle has a UA80 8-speed transmission that has prematurely failed. This is a KNOWN issue to Toyota and they have refused to provide a fix. It is a safety hazard when all acceleration stops when attempting to merge into heavy traffic (as had happened to me last week) or on a highway traveling at top speed. I have only 27,000 miles on this automobile and it failed with NO WARNING! Within a very short time frame the following occurred: the check AWD system, TRAC off, check engine and the transmission fluid at a high temperature lights appeared on the dashboard. Shortly thereafter I experienced a burning smell, suddenly no acceleration with a high TAC response and vehicle jerking. My transmission is toast. This would have ended very badly for me as it failed on a highway at speed with heavy traffic. Toyota needs to address this and recall and replace. Shame on you Toyota!

I was parking my car and was almost to the gray slab to stop when the car suddenly surged forward! It felt like an airplane taking off. I hit a brick building. Somehow my nose was broken, and I was bleeding profusely. If someone had been walking on the sidewalk in front of me, they would have been crushed against the brick wall. Others have had this problem; in fact, one lady said she almost hit a brick wall! Ironic! There was no warning of any kind. However, the day before, while driving on the highway, the car did the same thing: it surged forward, but fortunately I was able to control it, and there had been no one in front of me. If I had been driving locally, I surely would have hit someone, and who knows what the consequence would have been. The Insurance Company towed the car and totaled it.

While driving my 2018 Toyota Highlander Limited, the check engine light began flashing off and on. I was near an exit and drove off the freeway. I could feel the car (near the gas pedal) start shaking, then the power went down quickly... as I was trying to find a safe place to go. The farther I drove, there was less power until the car was going about 2 miles an hour. The check light continued flashing as I pulled into a parking lot. This was very scary as I'm sure the car would have just stopped on the freeway if I had not been near an exit as it just simply had no power left. (The check engine light has been on over a year and I took it to three different mechanics. Not one could fix it. This car wiped out my savings and now sits at a Toyota dealership)!

I just got my vehicle inspected and successfully passed with no codes on 07/07/2026. Today 07/10/2026 as I was driving to work my vehicle began to jerk/ jitter and when into limp mode. I took it to a shop to have the codes checked on it and they said it was something to do with the transmission and they don’t specialize in that type of work. My vehicle has less than 45400 miles on it and been maintained regularly. I was told this was a common issue with these vehicles. I don’t know where to go to get this serviced. I called around to local shops with no luck at getting someone to fix or look at the cause of it.

The contact’s daughter owns a 2018 Toyota Highlander. The contact stated that while operating the vehicle, there was a clunking sound coming from the front driver’s side of the vehicle. The vehicle was taken to the local dealer, and the owner was informed that the struts needed to be replaced. The vehicle was not repaired. The vehicle was later driven to a local tire and battery service center who inspected the vehicle and informed the owner that the front control arms were rusted and needed to be replaced, and that the front axle was cracked. The vehicle was not yet repaired. The daughter was informed that the vehicle was unsafe to drive. The manufacturer was not yet contacted. The failure mileage was 101,000.

Transmission failed at 65,000 miles right after the warranty expired. Cost to fix is $8,000. This is an epidemic issue with Toyota Highlanders built from 2017 to 2023. Tried to get dealer to cover but they said they refuse. They said that Toyota Corporate settled by paying all dealerships for potential repairs due to this issue, however all funds have been depleted. Basically no help at all. Pursued issue with Toyota Corporate for several weeks of escalations and appeals. In the end they completely refused to offer any solution other than for me to pay out of pocket. This issue should have been a nationwide recall due to the systemic failure on thousands of Toyota Highlanders. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My car had around 52,930 miles on it when the transmission suddenly went out and left me stranded in [XXX]. I always took my car to the North Hollywood Toyota dealership regularly, twice a year since I bought the car for regular service maintenance. When I was quoted nearly $7,000 to replace the transmission, I sold the car. Why would a 2018 Japanese car with such low mileage and in great condition suddenly have transmission problems? Something doesn’t add up. I had to get towed home. I’m wondering if other Toyota Highlander owners have experienced unexplained transmission problems as well. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Complaint: I am writing to report a transmission defect in my 2018 Toyota Highlander AWD (UA80 8-speed automatic transmission). Prior to the check engine light illuminating, I noticed a burning smell coming from the vehicle. Subsequently, the following fault codes were retrieved: •P0741 – Torque Converter Clutch Circuit Performance/Stuck Off •P2714 – Pressure Control Solenoid “D” Performance/Stuck Off •P2757 – Torque Converter Clutch Pressure Control Solenoid Circuit Performance/Stuck Off These symptoms are consistent with the known defect described in Toyota’s Customer Support Program ZJC (POL19-04), which acknowledges a manufacturing defect involving an improperly bent washer tab inside the UA80 transmission. However, my VIN was not included in the covered vehicles under this program, despite experiencing identical symptoms. I am also aware that multiple class action lawsuits were filed in December 2025 against Toyota alleging the company knowingly concealed this defect from consumers for years. I am requesting NHTSA to investigate whether Toyota’s CSP ZJC coverage should be expanded to include additional affected VINs, and to consider issuing a mandatory recall for all vehicles equipped with the defective UA80 transmission.

Transmission failure (whining noise similar to the well-documented issue with UA80F 8-speed transmissions). I reported the noise and requested a specific diagnosis at approximately 95k miles --- no warning lamps/warnings were visible, just noticeable noise while driving without the radio on. On May 22, 2026, Torrington Toyota confirmed that the transmission was failed, but vehicle is drivable. As I purchased a Toyota Extended warranty, Toyota has approved the order of a remanufactured unit, which is on back order, so repair date is TBD/unknown. I lack confidence in the long-term viability of remanufactured unit, as this UA80F transmission continues to have issues, and will cost me $12k+ after the warranty expires, in the likely case that the remanufactured unit fails. There should be a long-term fix to this expensive issue.