2019 Toyota Highlander: complete transmission failure

Filed Nov 5, 2026 · Engine, Transmission · 84,820 miles · FL

The contact owns a 2019 Toyota Highlander. The contact stated that while his wife was driving, the engine made an abnormal sound. While making a turn, the vehicle experienced a loss of motive power, slowly responded, and the transmission failed to shift properly. The traction control warning light illuminated prior to the failure, and the check engine warning light illuminated after the failure. The vehicle was taken to the dealer for diagnostic testing. The dealer diagnosed the vehicle with transmission failure, and the contact was informed that the transmission required replacement. The vehicle was driven back to the residence. The contact stated that the vehicle was unsafe to drive due to the transmission failure. The failure mileage was approximately 84,820.

Filed Nov 4, 2026 · Transmission · NY

Transmission. I brought my 2019 Toyota Highlander to the Toyota dealer for an oil change. Reported a whirring sound when depressing the gas. After they inspected it, I was told it needs a new transmission. I don't know when it can malfunction when driving.

Filed Nov 2, 2026 · Transmission · IA

Whining in the transmission. Took to a certified Toyota Mechanic and confirmed transmission is failing. Will need a total transmission replacement.

Filed Oct 28, 2026 · Transmission · VA

The component that failed was the transmission. My safety was at risk because I was going uphill and the engine surged then the transmission seized, almost causing a rear-end incident with my family in the car. The dealer confirmed that the transmission has failed. No incident happened so only the dealer needs to be involved at this time. There were no warning lamps indicating to me that the transmission failed. Upon discovering that the transmission was not downshifting (based on the engine not downshifting uphill), I put the car into manual mode to determine if I could manually shift down or not, it would not downshift. Attempting to downshift to gears 4, 3, 2, or 1 was not possible, the lowest gear was gear 5 and the engine had no torque to get up the hill that it was seized on. The 2019 Toyota Highlander was serviced for the automatic transmission fluid at 100K miles and failed at about 120,450 miles.

Filed Oct 27, 2026 · Transmission · MA

My transmission failed while driving. The gears began to stick and then I lost all driving capability while on a state highway.

Filed Oct 26, 2026 · Transmission · CO

The transmission has been making a whining noise for a little while now. After having it diagnosed by Toyota, the entire transmission has to be replaced. According to multiple reports on the internet, the 8 speed transmission in the 2017 to 2026 model will fail prematurely do to defective components. Toyota has even replaced multiple model year transmissions under a specific TSB but has not included later model years. I know have to spend $10,500 to replace the transmission at Toyota.

Filed Oct 23, 2026 · PA

I purchased this Toyota Highlander two years ago, and I am extremely disappointed and frustrated that it now requires a transmission replacement costing approximately $10,000. I understand that vehicles can require maintenance and repairs, but a major mechanical failure of this magnitude is a significant financial burden. I have reached out multiple times seeking assistance and a reasonable resolution, but I have been unable to get anyone to take responsibility or offer meaningful help. I should not be left to shoulder such an enormous expense without a fair review of the circumstances. I am filing this complaint because I believe this matter deserves further investigation and I am requesting assistance in reaching a fair resolution.

Filed Oct 23, 2026 · FL

I was on interstate 75 and the transmission went out. I had to be towed home (over 100 miles). I pulled into a rest area and when I went to leave, I pulled out and the engine RPM's went real high and the car would not go over 20 MPH. I was in the way of semi-trucks as I tried to get back to a parking spot at the rest area. Thankfully This did not happen while driving. After getting to the repair shop they could not even steer the car. I want Toyota to help me with the cost of the repair. This car only has 85,000 miles on it and it is a 2019. It should be good for at least 200,000 miles. I feel very fortunate that I was not actually on the highway when this happened.

Filed Oct 21, 2026 · Transmission · UT

Transmission is making a whining noise, took it to the dealer and they confirmed the transmission needs to be replaced. Looked online and there appear to be thousands of these cases with the transmission going out on Toyota Highlanders between 2017-2021

Filed Oct 16, 2026 · Transmission · IL

I am filing this complaint regarding a transmission failure in my 2019 Toyota Highlander at approximately 150,000 miles that resulted in a complete loss of propulsion while driving on the highway. My husband was driving to work toward River Forest, Illinois, when he initially noticed that the vehicle would not accelerate beyond approximately 60 mph. After attending practice, he decided to return home rather than continue to the office because of the vehicle’s performance. While driving home on the highway, the vehicle progressively lost the ability to maintain speed. Despite traveling at approximately 60 mph, the vehicle slowed to approximately 30 mph, then 20 mph, and eventually lost propulsion completely. This created a serious safety concern because the vehicle could no longer maintain highway speeds or continue driving normally, potentially exposing the driver and surrounding motorists to a collision. The vehicle was subsequently taken to an independent repair facility for evaluation, and a transmission failure is suspected. The estimated cost to replace the transmission is approximately $5,000 to $10,000. I contacted Toyota Corporate to report this failure and request assistance. Although a case number was assigned, Toyota representatives informed me that they would not escalate the concern without historical maintenance documentation. We purchased the vehicle in 2024 and do not have access to its complete maintenance history. I am requesting that the federal safety agency investigate whether this transmission failure and sudden loss of propulsion represent a broader safety defect affecting Toyota Highlander vehicles.

Filed Oct 15, 2026 · Transmission · 65,000 miles · NJ

The contact owns a 2019 Toyota Highlander. The contact stated that while driving at various speeds, a loud grinding and humming sound was heard intermittently from underneath the vehicle. The vehicle was taken to an independent mechanic, who diagnosed a transmission failure and warned that the transmission could experience a complete failure. The vehicle was not repaired. The mechanic contacted the manufacturer, who confirmed that the VIN was not included in a recall. The manufacturer contacted the dealer on the contact's behalf; however, no further assistance was provided. The failure mileage was approximately 65,000.

Filed Oct 14, 2026 · Transmission · MD

Transmission had problems with shifting gears - can hear a banging noise while shifting gears. Reported to dealer and they indicated diagnostics report showed purge valve issues. Nothing showing transmission errors. 9/20/26 significant transmission Issues occurring with eco mode turning on and off problems with shifting and no power with RPM up to 5 let off gas pedal and eco shift then transmission accelerated. Problem repeated for 40 miles on Interstate 95 with family and animals. Engine lights finally come on stating AWD error traction control On and off visit dealer an 1/8 mile from Haley Toyota Richmond VA - $280 diagnostics show transmission failure, needs to be replaced for $12000 at 87K miles warranty expired no assistance offered and "0" transmissions available throughout the United States- - $470 out of pocket tow truck to get it to a local transmission shop in Waldorf MD 25 miles from home. Definitely a safety issue when there is no acceleration on a major highway and now error codes to indicate there is a major transmission problem!