2025 Toyota Grand Highlander problems

Filed Oct 27, 2026 · CT

The front panel of the two-panel glass moonroof spontaneously shattered, buckled and collapsed onto the panoramic roof sunshade of my 2025 Toyota Grand Highlander Hybrid without any impact or accident. I was driving at about 35-45 mph on a paved road and noticed the sound of wind coming from the car ceiling. I opened the panoramic roof sunshade slightly to see if the moonroof was open and saw that the front panel of the two-panel glass moonroof had spontaneously shattered. By the time I got home about an hour later, the moonroof glass had buckled about 1/2 inch into the air and a large chunk of the moonroof glass had collapsed onto the sunshade on the ceiling of the car. I now have a 6x10-in. hole in the moonroof glass and large, raised cracks much longer than that. The repair shop told me not to drive the car, because the broken shards of glass could damage the sunshade and get into the moonroof track. My car is available for inspection upon request. The defect in the moonroof glass clearly put my safety at risk. Had the sunshade not been closed when the glass collapsed, my car would have been full of shards of glass. I could have been hurt, and it could have caused an accident. This problem has been reported online repeatedly in Toyota Highlanders, as well as in Toyota RAV4s, resulting in a class action lawsuit with respect to the RAV4s. A service representative at the Toyota dealer saw the problem, but she could not help me because they don't handle glass. I also reported the problem to Toyota at 800‑331‑4331, but they have not inspected the damage. I have been informed that there are no replacement skylights for my car anywhere in the US and that it will take 1-2 months before the part will arrive. Nevertheless, Toyota has refused to pay for a rental car or cover the indoor storage I will need to obtain for my vehicle while we wait for some indeterminate time for the part to come in. There were no warnings of any kind before the skylight glass failed.

Filed Oct 25, 2026 · Suspension, Transmission · NY

Experienced repeated axle issues, acceleration hesitation, and poor suspension performance. Dealer failed to identify or reproduce the problem despite multiple visits and diagnostic fees. Axles eventually required out-of-pocket replacement due to popping and clicking. Suspected axle defect persists, and the vehicle remains unsafe-feeling and unresolved. Requesting Toyota investigate and provide free repairs.

Filed Oct 15, 2026 · Fuel system · IL

The vehicle exhibits abnormal fuel system behavior. When the vehicle reaches a low fuel condition (approximately 40–50 miles to empty), the fuel tank only accepts about 12 gallons, even though the listed tank capacity is 17.2 gallons. After refueling, the fuel gauge displays FULL and the “Distance to Empty” reading jumps to over 360 miles, which is inconsistent with the amount of fuel added. A Toyota dealer documented this behavior on a repair order, stating that the tank accepted only 12 gallons from a low fuel condition and immediately displayed a range of 363 miles. A second repair order states that the fuel system was inspected and that the tank supposedly has a “3–5 gallon reserve,” but no technical documentation was provided to support this claim. Toyota’s customer support later provided a written response stating only that mathematically 3–5 gallons must have been in the tank, without offering any engineering explanation for why the gauge reads FULL or why the vehicle reports an inflated driving range after adding only 12 gallons. The dealer also provided documentation explaining the issue using online forums and social media posts rather than Toyota engineering documentation. Safety concern: Because the gauge displays FULL and the vehicle reports a high range when the tank has not actually been filled to capacity, the vehicle may be operating with significantly less fuel than indicated. This creates a risk of unexpected fuel starvation, hybrid system shutdown, and loss of propulsion if the vehicle runs out of fuel while the driver believes adequate range remains. Supporting documents include dealer repair orders, Toyota’s written response, a dealer explanatory response, and confirmation that the issue was escalated internally.

Filed Oct 13, 2026 · Driver assistance, Steering · GA

I experienced a serious safety incident involving my 2025 Toyota Grand Highlander with approximately 14,000 miles. While driving on a straight interstate highway at approximately 70 mph, surrounded by other vehicles, the steering wheel suddenly made two to three sharp, forceful jerking movements to the left. Afterward, the steering wheel remained approximately 20 degrees off-center to the left. All lane departure assistance sensors were active during the incident. This unexpected steering behavior created a significant safety hazard. At highway speed, I could have lost control of the vehicle, departed my lane, or collided with surrounding traffic. I was able to reach my destination, but the steering wheel remained crooked. Immediately afterward, I took the vehicle to an authorized Toyota dealership for inspection and repair. The technician reported that the left rear wheel was significantly out of alignment and that the left rear alignment eccentric lock nut was loose. According to the technician, this caused excessive wear on the inside tread of the left rear tire. The dealership also performed a vehicle health check to identify any system faults. My vehicle has always been serviced by authorized Toyota dealerships. At the last service appointment, at approximately 10,000 miles, no related problems were identified. The technician confirmed that no alignment-related work had been performed during that visit. The vehicle had no previous similar issues. I am concerned that the loose alignment eccentric lock nut and resulting severe misalignment may indicate a mechanical defect that could compromise vehicle stability and steering safety. The sudden steering movements at highway speed presented a serious risk to me, my passengers, and other motorists. I respectfully request that the federal safety agency investigate this incident and determine whether a safety defect exists in the 2025 Toyota Grand Highlander involving the rear suspension alignment component, eccentric locking, sensors.

Filed Oct 9, 2026 · Brakes, Electrical · OR

On 9/26 at about 10:15am, my husband and I were fully stopped at a red light with his foot on the brake. Without him touching the gas pedal, the car suddenly surged forward as if it had been accelerated. It stopped for a moment, then surged forward again. Because he was holding the brake, the car didn’t move much, but each surge caused a hard jolt that felt like being rear-ended. No other vehicle hit us.

Filed Oct 6, 2026 · Transmission · OH

While driving in neighborhood at around 25 mph car started to sputter and lose power. Started flashing on display regarding ADAS which all disengaged then hybrid system failure message displayed. Stopped car, called dealership and asked if safe to drive. They said it was ok and set appointment for next morning, they contacted Toyota and confirmed it needed a new transmission. Gave me a rental and said car was do not drive. Said transmission backordered under warranty.

Filed Sep 30, 2026 · Body · NM

Driving in city traffic during morning rush hour, sitting at traffic light, when display lights up indicating “Hybrid Malfunction” and “take vehicle to dealer”. Leaving traffic light, the vehicle at first does not move after pressing accelerator, then slowly engages and thugs along. Pull over on closest side street and turn off vehicle, hoping just a fluke. Restart vehicle and drive a few yards. Stop and attempt to resume driving. This time the vehicle does not react at all, neither in drive or reverse. I was able to put in neutral and coast to nearby parking spot so not to block traffic. Had vehicle towed to my hometown Toyota dealer. Upon inspection, they notified me that a small object, probably a rock, had punctured the radiator , that it was not covered under the warranty, and would cost $2500 to fix. The suddenness and abrupt fashion this incident occurred could certainly have resulted in an accident or left be stranded in an unsafe area.

Filed Sep 28, 2026 · Engine · TX

Engine temperature overheated during long idle on an out of town event. The vehicle put in park and engine running in idle with AC running. Vehicle coolant temp reach high mark in the red area. Vehicle temp alarm gave a warning to shutdown. I estimated the car idle time 40 min due to traffic accident ahead. The incident occurred on 9/11/26. The car was taken to dealer 9/17/26 for checkup/diagnose the issue. Dealer stated, they could not duplicate the issue. But they did my find the vehicle computer log, the engine registered high temp.

Filed Sep 21, 2026 · Engine · 15,000 miles · WI

The contact owned a 2025 Toyota Grand Highlander. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with radiator failure. The contact was informed that there was a hole in the radiator. The contact was informed that the radiator needed to be replaced. The vehicle was repaired. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 15,000.

Filed Sep 18, 2026 · Engine · OK

A piece of road debris/rock struck the radiator/heat exchangers in my 2025 Toyota Grand Highlander Hybrid that immediately damaged the radiator/heat exchangers to result in coolant leakage and sudden loss of propulsion and terminated the engine from moving and required a tow to a Toyota dealer and thus a replacement of the heat exchanger/radiator. It came apparent from their experience that the design of the front-end grill has large, open apertures and no protective screen between the grill and the vehicle’s heat exchangers. Had to file an insurance claim under comprehensive coverage that required me paying a deductible for repairs and NOW stress in future driving experiences.