When 87 octane fuel is put into the vehicle, the 2023 highlander is sluggish to start and make jump at times as well. After reading other complaints online, the current fix was putting 93 octane in the vehicle to remedy the issue. Putting 93 octane fuel in the vehicle does help although the vehicle jumps around RPM's when going from ECO mode to normal. All of these issues pose a risk to the car jumping from a start to cause a rear-end accident. I've complained to the dealer and they've stated everything is normal. Folks online stated their dealerships said Toyota was working on a fix.

- Tega Cay, SC, USA

Upon acceleration, car hesitates then surges. Started after approximately 2000 miles. Occurs most frequently from a dead start. However, continues upon acceleration up to 50 mph. Took to Toyota Dealer, but they were unable to diagnose. Others report similar problems on Toyota Nation Form. Concerned about pulling out into traffic safely

- New London, NC, USA

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.

- Gahanna, OH, USA

There is a significant hesitation / stuttering when the gas pedal is pressed (i.e. the vehicle doesn't move properly when the gas pedal is pressed). This is especially dangerous when pulling out into traffic, making turns, etc. This appears to be a known problem with this model and Toyota is working on a TSB (supposedly). Doing a Google search for this problem shows that a number of consumers are having a similar issue. A few people have documented the issue here: https://www.toyotanation.com/threads/2023-highlander-2-4-turbo-surging-and-bucking-under-acceleration.1751952/ This is an ongoing problem. It hasn't resulted in an accident yet, but the lag / stutter in accelerating is putting consumers at risk. I just picked one random date below, but it has been ongoing since the vehicle was purchased new and appears to be happening to numerous other people as well as is evidenced by an internet search.

- West Linn, OR, USA

Almost since purchase this vehicle has emitted a shudder when driving. The loss of power has affected ability to evade when making turns, acceleration on highways, and has caused safety concerns while driving with children in the vehicle-this is a brand new vehicle purchased with approximately 7 miles on the odometer. Vehicle has been in the shop at least 3 times, 4 with today's visit. ToyotaNation forum shows that there are MANY vehicles with this issue and that Toyota Master Technicians are aware of the issues.

- Auburn, WA, USA

2023 Toyota Highlander XLE with 2.4 Turbo hesitates for an unacceptable period of time when accelerating from a stop. This could pose a huge safety risk when merging into traffic from a stop sign. The lag / hesitation is present on all eco / normal / sport drive modes. The issue has been occurring since the vehicle was purchased at 70 miles and currently has about 5200 miles. Toyota needs to look into this issue and address it as soon as possible.

- Victoria, TX, USA

The vehicle hesitates when accelerating from a stop. Dealership Technician says he noticed the hesitation when accelerating, but since there are no DTC-??s and No Data found saying that there is a malfunction

- Pelham, GA, USA