2020 Toyota Highlander

The 8 speed automatic transmission is failing at 100k miles. Whining noises are heard and after being taken to Toyota dealerships mechanic, we were told that the gear mesh or bearing is bad and that we'll need to replace the transmission. We were told that many other highlanders have experienced the same issues. No light popped up before or during driving while the transmission is whining.

On August 3, 2025, the vehicle developed a loud humming noise. After an inspection on August 12, Heritage Toyota informed me that the transmission had failed and would require replacement at an estimated cost of $9,000. This failure occurred only days past the five-year warranty and just 8,834 miles beyond the 60,000-mile powertrain limit. I immediately contacted Toyota’s Brand Engagement Center (Case #250814000192). Despite speaking with multiple representatives over several weeks, my inquiries were repeatedly delayed, escalated, or dismissed. At one point, I was even informed that further follow-up on my case would be deleted through Toyota Website. Ultimately, I was offered 50% coverage of the transmission replacement. While I appreciate this offer, it does not fully address the seriousness of a transmission failure occurring under such circumstances. I also contacted Heritage Toyota directly to request assistance, but my calls to the service manager went unanswered, and the dealership declined to provide any additional support. I believe this situation raises concerns about both product quality and customer care. A transmission should not fail in under five years with fewer than 70,000 miles, especially on a well-maintained vehicle serviced exclusively by Toyota. I respectfully request that Toyota be held accountable for this failure and that further review be conducted to determine whether this issue represents a larger pattern of premature transmission failures in Highlanders.

1- Most of the time my rear hatch will not close unless you use the inside button - cost 1,198.10 to repair. 2- my car started making a whining noise on acceleration. Took it Toyota and they said that I need to replace my transmission that it has an internal failure. Of course my warranty was of no use b/c it stopped at 100,000 miles. At the time of the inspection I was at 104,000. To get a new transmission it will be 7,425.60 (not including the labor). I really wish the dealership could have been honest about this year model transmissions failing. I would have passed on this car.

So there was a service bulletin put out by Toyota in December 2020, about its AC repair. Well no notice was given to Toyota owners about this. Well fast forward to yesterday May 21, 2025, my mechanic told me that the AC lines to the rear were leaking and needed to be replaced as it was leaking refrigerant into the environment. Well after reading reviews and other folks problems it seems Toyota knows there is a problem with the ac lines and the type of material they used. Toyota should be issuing a recall notice on these cars to replace the ac lines so it does not pose an environmental hazard inside or outside the vehicle.

While driving on the freeway in the evening about 10 minutes into the drive, a loud bang was heard like a shotgun and the front portion of the panoramic sunroof had shattered. Small shards of glass entered the cabin but fortunately no one was injured inside the vehicle. No sign of a rock hitting the vehicle or defect in the panoramic had occurred prior to this incidence. It appears to have occurred spontaneously. There was a large hole in the glass with an outward projection like the pressure inside the vehicle somehow blew out the sunroof. The passengers in the vehicle were at risk of being covered in small shards of glass including a small child in a rear facing carseat who was sitting behind the driver's side. The driver and front passenger would have been impacted as well if the glass gave away. This occurred at high speeds on a freeway where if the glass would have fallen inside the cabin could have caused the driver to be covered in glass, injured while driving at high speeds and caused a wreck. The incident was reported to the highway patrol who could not place a formal report because they said it was not a mechanic defect and the Toyota corporate office said that they could not report because it was a glass issue. Insurance has not been informed yet as we are waiting from the local dealership to see if they can assist. There were no warning messenger prior to this problem and it occurred spontaneously.

There is an open recall which has not been addressed in a timely manner. The below has been open since OCT 26, 2023. I have been advised that I would be notified when a remedy was available but it's been ten months with no solution. My front bumper detached while I was on the interstate causing damage to the front end of my vehicle. The subject vehicles are equipped with a resin front lower bumper cover assembly, connected with mounting tabs. If there is minor impact to the lower front bumper cover assembly that causes the mounting tabs to detach from the vehicle during normal operation, one or more parts of this assembly could detach, which could become a road hazard, increasing the risk of a crash or injury for other road users.