2023 Toyota Highlander Engine Problems

“On 10/21 the vehicle accelerated on its own. At a stoplight behind another automobile, when I only slightly lifted my foot from the brake, the car lurched forward and the auto safety stop system lit up. I never touched the accelerator pedal. I pushed back down on the brake. This was not the first time this happened.”

“My new Highlander has had issues that I can describe as power surging when accelerating from a stop. The car frequently does not respond to accelerator being pushed down for a second or two and then surges from a stop to accelerating with very inconsistent results. The acceleration is not consistent and unreliable. When crossing traffic from a stop I need to think twice and do not have confidence the car will do what I want.”

“We live on a farm so the fact there is rodents is no surprise. However strangest thing is the knock sensor harness has been chewed completely off two times in last two months.. when this happens it causes power loss. With the extra shielding the wire has tells me it gives off a low frequency that would irritate most animals and me at this point since the part is never available. If it actually gives off a frequency, it is absolutely unnecessary and a complete nuisance.”

“weather conditions were severe due to a snowstorm, causing ice buildup on the road, low visibility, and slippery pavement. Despite driving cautiously, I lost control of the vehicle, which resulted in going off the road, down an embankment, and crashing into a tree. Immediately after the impact, I called 911 emergency services for assistance. I attempted to exit the vehicle, but the driver’s door was blocked due to the position of the tree. I remained inside the vehicle until a passerby stopped and helped me get out. …”

“There’s a noticeable lag in the engine, especially when starting or turning. Sometimes, it’s almost a full second, which is quite alarming. When I asked the mechanics at a few dealerships about this, they all said it’s normal for these new “Green” type engines with four cylinders and a turbo. However, I feel that the turbo is functioning poorly as the mileage increases. I’ve owned the car for almost three years and it only has 20k miles! Another issue is the wind noise. At speeds exceeding 40 mph on the highway, the wind noise can become quite annoying. …”