2024 Toyota Grand Highlander Complaints

Vehicle: 2024 Toyota Grand Highlander Hybrid Max The vehicle intermittently experiences a severe hesitation and shudder during acceleration from approximately 0-40 mph. The condition occurs only under specific circumstances: -The vehicle has been parked long enough for the engine, transmission, and related systems to cool to ambient air temperature. -The vehicle is started and driven shortly thereafter. -Engine oil and transmission temperatures are below approximately 160°F. -The air conditioning system is operating at maximum cooling with Eco Air Mode enabled. -The hybrid battery indicator displays approximately three bars of charge. When these precise conditions are present, the vehicle may hesitate, shudder, and fail to respond normally to accelerator pedal input during acceleration. Even with the accelerator pedal fully depressed, repeatedly, there is a noticeable delay in power delivery and vehicle acceleration. This creates a situation where the vehicle does not accelerate...

A couple of days ago, I was driving when my Toyota Grand Highlander started displaying a series of alerts. These alerts included "Hybrid system malfunction" "All Wheel Drive malfunction," "Check engine. See dealer," and finally something akin to "Find a safe place to pull over and turn off vehicle." Until these alerts appeared, back-to-back-to-back, there were no indications that there was anything wrong with the car. We were fortunate enough to be both close to home and close to a dealership when this happened and were able to bring the car in right away. If we were in a high traffic situation, or, conversely, in a very rural area (specifically in winter, not an unlikely happening for us), having the car's drive system suddenly fail out of nowhere could have been very dangerous. As I said, we were able to get the car to the dealer soon after. The dealership informed us that the car has a coolant system perforation, more than likely from a rock penetrating the grill. The coo...

What component or system failed or malfunctioned, and is it available for inspection upon request? I was driving when I heard a loud boom, it almost sounded like a gunshot. Not noticing anything I continued driving. After a short distance I started hearing wind whistling. It was at this point I pulled over and saw my sunroof had shattered and there was a big hole. How was your safety or the safety of others put at risk? If I had not have the shade closed glass would have fallen into the car. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes, I brought the car to the Toyota dealership. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? I did call my insurance company but I am not sure if they actually inspected the damage. They have been dealing directly with the Toyota dealership service department. Were there any warning lamps, messages or other symptoms of the problem pr...

My 2024 Used Toyota Grand Highlander Hybrid Platinum Max was at a slight decline stopped at a stop sign in Echo mode. The whole car began to violently shake and lurching forward. No one was in front of me and my foot was on the brake or I probably would have run into a car in front of me. The dashboard then flashed a warning about the hybrid system overheating. The only way to stop it was to turn off the engine, then turn it back on. The car then began driving normally. I have also had an issue with hesitation felt while accelerating 0-40 mph with study throttle. Upon researching both issues, they should be resolved with TSB calibrations to my car of T-SB-0028-25 and T-SB-0017-24. This is not an error that would come up when doing a diagnostic check on my car's computer per research I have done. I took my car to get the updates at Toyota of Redlands, CA, and they refused to do them unless they could recreate them themselves. I called Toyota to report this, and they said tha...

On [XXX], while driving my 2024 Toyota Grand Highlander at approximately 45-50 mph on a gusty, high-wind day, the rear panoramic moonroof/sunroof panel blew out and shattered completely without warning. The failure occurred as I rolled up the vehicle windows during the wind gust. Rapid window closure created a sudden spike in cabin air pressure — a documented pressure differential mechanism — that forced the moonroof glass outward until it shattered. There was no external impact of any kind. The glass, which is not laminated safety glass, scattered throughout the interior with occupants present. Component is available for inspection. This failure is consistent with NHTSA Investigation PE13-035 (Kia Sorento panoramic sunroof spontaneous breakage), in which ODI found glass shattering while in motion to be a safety hazard warranting engineering analysis. The same pressure-based failure mechanism applies here. This is a documented pattern on this specific model. Lemberg Law [XXX] ) an...