On high-temperature days, when the A/C is running at full capacity, the vehicle occasionally fails to accelerate from a stop. This issue persists even after applying the recommended ECM update. The lack of reliable acceleration poses a significant safety risk, particularly when turning across oncoming traffic or entering a busy street. This situation can leave the vehicle stalled in the path of approaching vehicles, increasing the likelihood of an accident.

- Aberdeen, MD, USA

The car stalls or fails to accelerate from a complete stop despite adequately stepping on the gas pedal. This has left me in dangerous situations with oncoming cars as my car fails to move as expected. This issue occurs sporadically.

- Stockton, CA, USA

- Vehicle intermittently will not respond or will barely respond when accelerator is depressed from a complete stop or near (rolling) stop. I have noticed this issue mainly when A/C is on high and during hot temperatures. I reside in the Phoenix, AZ area where high temperatures have been ranging around 110-115. - This poses a safety risk when attempting to pull out onto a busy road, either turning left or right. If the gas pedal fails to respond, this could lead to a serious crash. - This issue has arisen following a recent software update that Toyota performed (under service bulletin TSB-0017-24). This update was done to correct a different issue (shifting hesitation between gears when accelerating from 0-40mph), however it seems to have negatively affected the response of the vehicle when starting up from a stop. I have not yet taken my vehicle back to Toyota with this issue, but MANY owners of the HybridMAX are experiencing this same issue as the weather temperatures have peaked. - No warning lights appear when this occurs. The problem arose shortly after I had a software update done at the dealer on June 14, 2024.

- Goodyear, AZ, USA

Sometimes the vehicle will be very sluggish when accelerating from a stop, it is hard to replicate, and inconsistent.

- Georgetown, TX, USA

while the engine has not warmed up, when its hot and air conditioning is on high, vehicle does not respond to the gas pedal while trying to accelerate from a stop. vehicle hesitates on acceleration. i feel this is a safety problem, because i need the car to merge quickly onto the road from a stop. this hesitation could cause a bad accident. i feel like the hesitation, is the car trying to find the gear.

- Henderson , NV, USA

The vehicle randomly won-??t go when starting out from a complete stop. You can push the gas pedal to the floor and it will barely move. Almost got hit in an intersection trying to make a left turn. Toyota is aware of the problem and has a TSB and did an ECM update but the problem persists. It-??s scary when it happens. Can-??t trust the vehicle.

- River Heights, UT, USA

when moving from a full stop, the car sometimes has hesitation to move to a full speed.

- Staten Island, NY, USA

**Vehicle:** Toyota Grand Highlander Hybrid Max **Issue:** On high-temperature days, when the A/C is running at full capacity, the vehicle occasionally fails to accelerate from a stop. This issue persists even after applying the recommended ECM update. **Safety Concern:** The lack of reliable acceleration poses a significant safety risk, particularly when turning across oncoming traffic or entering a busy street. This situation can leave the vehicle stalled in the path of approaching vehicles, increasing the likelihood of an accident. **Action Taken:** Applied the ECM update that is supposed to resolve the issue, but the problem persists.

- Centennial, CO, USA

Starting off from a stop or at low speeds the vehicle loses all power. Engine stumbles and does not respond, when it happens it almost feels like the engine may stall. Pressing the accelerator and the vehicle will not move, then suddenly will start to go seconds later. This has almost resulted in a crash since the vehicle loses all propulsion unexpectedly. No warning lights. Took to the dealer twice and everything is -??normal-?? no codes stored.

- Erie, PA, USA

There are two documented events, Jun 28 and Jul 02, but several others have been observed While moving forward -Exiting a private drive, from a stopped position -Turning right to merge into a traffic lane -The vehicle failed to accelerate rolling forward into traffic at idle speed only -There was no response from the vehicle when the accelerator peddle was depressed or re-depressed -Vehicle had to be -??coasted-?? to the right shoulder out of the way of oncoming traffic After traffic passed -While still on the road shoulder and the vehicle still running -It was a minute or two before the vehicle started to respond to throttle -When it did started to respond, it was laggy for about 30 seconds -Response remained laggy until the speed passed 20 mph and it started to respond as normal There were no vehicles or obstructions within range that should have triggered a vehicle control response There were no instrumentation or gauge cluster warnings indicating obstructions

- Ridgecrest, CA, USA

Our vehicle loses power after initial startup when you first accelerate. We have had three incidents where we were pulling out from a stop sign or stoplight on a major road and you press the gas and the car shutters and doesn-??t move at all. All three times a car accident almost occurred. This has been reported to the dealer and they replaced the entire hybrid powertrain. The issue persists at random with no warning messages generated by the car. It also hasn-??t been replicated for a dealer to see themselves. It-??s extremely dangerous and has been reported numerous times on forums.

- Tucson, AZ, USA

Bought in September 2023, within the first month, it started making a clunking noise when the wheel was turned to the left. The noise continued to get louder and started to make the same noise when turning right. In November, I got in my vehicle and it wouldn-??t start. The dash and everything was flashing and making a cranking noise. I took it to the nearest dealership. They -??charged-?? my battery and said it was fine. Also stated the noise was a heat shield issue and they fixed it. As soon as I pulled out of dealership, it still made the noise. The next morning went to start car, battery was dead. Had it towed to dealership for them to replace the battery. I filed complaint with Toyota, a field tech guy looked at it and said it had a bad left CV axel. No warning lamps/icons. But-??Dealership's said it was safe to drive. However, If it fails, it can cause the vehicle to stop or tires to lock up. Causing an accident! It can also cause more damage to vehicle parts/ transmission. Furthering decreasing the value of the vehicle.

- Buckhannon, WV, USA

Faulty CV Axles installed on 2024 Grand Highlanders. Toyota is aware of the problem and have edited the production of newer models. They have not issued a bulletin or recall for the ones installed in older models. Older meaning in the last year. This is a brand new vehicle. It started making noise when turning 2 weeks ago. The noise has gotten louder and occurs with every turn. It initially only made the noise when turning on an incline. If the axle fails, you lose control of the entire vehicle. Several dealerships have had to service and replace the axles, so Toyota needs to formally recall the ones installed in earlier Grand Highlanders before someone gets hurt. The vehicle sensors do not detect this issue. It was detected from sound and service at a Toyota Dealership.

- Lafayette, LA, USA

Every time we turn in the vehicle it knocks/clicks. A lot of research shows the CV Axle is causing this problem.

- Wetumpka, AL, USA

Very loud Popping/clicking noises when turning/accelerating from a stop. Only had 2,162 miles on the vehicle when this happened. While driving, it also felt like my front driver side wheel was wobbling-very unsafe. Called Toyota roadside assistance and had car towed to dealership. Lead service technician was able to reproduce the popping and clicking noise. Dealership opened a case with Toyota, and had engineers come look. 10 days later, they called to tell me that they have to replace CV axle. Car was in the shop 18 days total. This problem shouldn-??t be happening to a brand new car with 2,000 miles on it. There are MULTIPLE reports of this same thing happening to MULTIPLE Grand Highlander owners-on a -??Grand Highlander Owners-?? Facebook page. Some have had to have both cv axles replaced.

- Kilgore, TX, USA