2025 TOYOTA GRAND HIGHLANDER Engine Problems

Poor acceleration from 0 to 40. Vehicle will start shuttering at a dead stop. The engine has shut off once with this issue. It happened around 4800 miles.

The vehicle suddenly gave several warnings of “check engine visit your dealer”, “Hybrid system malfunction”, “AWD system malfunction 2WD activated” and “System malfunction visit your dealer.” The vehicle was bought new 4 weeks prior. Took it to the dealership and the technician said there was coolant all over the engine compartment and there was a leak somewhere. After inspection he told us that a small rock hit the radiator and caused damage. Told to replace the radiator and flush the system and it was not covered under warranty. After research was done, it was found there was a forum with hundreds of not thousands of people with the same issue. This has been an issue with the new OEM front grill not protecting the radiator and leaving it susceptible to be damaged easily. Toyota Corporate was called and said they were aware of the issue for some time. Even the...

The vehicle was in PARK and the IGN was in the ON/RUN position and the air conditioning was on. There was no one in the driver's seat but there was an occupant sitting buckled in the front passenger seat. The passenger heard a sound (possibly the ICE turning on) and he felt the vehicle move forward about five inches. He became worried about his safety and pressed the IGN button in order to turn the vehicle off. It could have pushed itself into other cars in the parking lot or pedestrians. A report was made to the local police department on the same day. This occurred in a retail parking lot. Video footage cannot be obtained as a police officer or insurance company must request it. I have not seen a check engine light nor any message prompts and it has not been inspected by a dealership.

I am submitting this complaint regarding a serious safety hazard and design flaw with the 2025 Toyota Grand Highlander Hybrid. While driving on a two-lane highway, our vehicle suddenly lost power and warning lights appeared on the dashboard. We were forced to exit the highway immediately (we were less than 0.5 miles to an exit). Shortly after pulling onto the off-ramp, the vehicle entered limp mode, significantly limiting its ability to function - all assist systems deactivated amd the car has a significant decrease in power. We were able to drive approximately half a mile to a nearby gas station, where we called for a tow. This situation left us vulnerable on a busy roadway, placing both us and other drivers at risk. The Toyota dealership diagnosed the issue as damage to the hybrid inverter radiator, allegedly caused by a rock or piece of debris entering through the front grille. We were told this was not covered under warranty,...