2023 TOYOTA HIGHLANDER Fuel/propulsion System Problems

I was involved in a vehicle crash on 7-1-25. I had just pulled out of the gas station and was coming up to a stop sign so I was only going about 8mph I put my foot on the brake and nothing happened. I had my foot all the way down on the brake pedal because I saw a car coming and they were traveling at about 40mph. No automatic braking nothing worked. I had no control. I just prayed that I hope this doesn’t hurt. None of my airbags deployed. My car is now totaled and of course I got the ticket because I did not have control of my vehicle. I strongly believe this has to do with the brakes and how it switches from electric to gas in my hybrid vehicle. Toyota has recalled prior years 2020 to 2022 hybrids for this exact issue. This is a huge safety issue and thankfully I am alive to make this complaint. My husband went to my Toyota dealership where I get all my service and the service manager said yes he has noticed this as a problem that he himself pulled in a Toyota Highlander Hybrid into the garage and had the same thing happen. We have been reading online about others complaining of this same issue.

Acceleration Issues, engine lag, poor response time and bucking when accelerated is pressed. Dangerous to drive not enough power to merge with traffic and hesitates to go at stop lights. Bought as a family suv and don’t feel safe with them in the car. RPMs jump when at idle. The car struggles to shift gears especially 2nd gear. Does not preform well under normal circumstances not sure how this car would ever be able to tow anything. I feel very mislead by Toyota and its reputation as this vehicle vehicle is lacking safety and performance. Reached out to Toyota about problems and have not received a remedy for the situation. A special campaign was issued but has not helped the problem. Very disappointed with this purchase as I paid over 50k for the vehicle brand new and don’t feel safe in the car as it bucks on acceleration and lacks the power to flow with traffic. This suv will cause negative impacts if safety measures aren’t started quickly.

Vehicle smells like gas/fuel sometimes. I brought it to the dealership and was advised that they cannot duplicate my concerns since they can't smell anything when I dropped it off.

On hot days the evap system does not function properly. You can visibly see gas fumes spewing from the filler neck area. The smell of gas inside and outside of the vehicle is horrible. It has caused headaches, nausea and dizziness to the passengers inside of the vehicle. It is extremely unsafe and Toyota doesn't know how to fix it. They are aware of the problem but refuse to remedy it. I personally know of 3 other highlanders doing the same thing. Not only is it a personal safety concern, it's also an environmental issue. This problem is with 2023 and newer highlanders and grand highlanders.

Vehicle is sluggish and will not accelerate from a dead stop for several seconds. The gas pedal often has to be pushed much farther down than usual so then when the vehicle actually starts moving it lurches. It often seem like it can't find the proper gear so it will buck and stutter while driving. The shifting is not smooth at all and you never know how the vehicle will respond making for a very unpredictable driving experience. This all started shortly after reaching the 2000 mile mark. The cruise control has issues reaching and maintaining the speed that is set. I found the Toyota service bulletin, T-SB-0087-23 and have made an appointment with my local dealer to hopefully fix the issue.

The car absolutely reeks of gas after driving for a while on warm days. You can visibly see the fumes around the filler neck. It has been the the dealer multiple times and they say they can't find anything. It seeps into the car causing headaches and dizziness. I personally know of 2 2023 Highlanders and 1 2024 highlander that have this issue. I am extremely worried this will cause a fire and/or explosion at some point.

When 87 fuel is put into the vehicle, the 2023 highlander is jerky/has hesitation, RPMs jump around. Trying to slow down to a yield then go again it jerks and almost feels like engine is cutting out. Seems worse when car is being driven on warm day with a/c on or under a “load”. Very dangerous in intersections. Current fix is to put 93 octane in the vehicle to remedy the issue. Putting 93 octane fuel in the vehicle does help. 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 when they test drive and no codes are showing even explaining a TSB was issued they refuse to fix. Started at 500 miles on odometer, still happening at over 13,000 miles.

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.

Engine intermittently has no power on take off and causes an unsafe condition to turning into traffic where car will just not go until after flooring it and a 3-5 second delay!! Engine also looses power and bucks or misses while accelerating through gears. This has caused multiple near miss incidents when turning into or across traffic. Also have issues with the steering assist that it yanks the wheel intermittantly. This cause me to loose control on the wet interstate in a turn when it yanked the wheel to the right while banking left at 65mph. I panicked and pulled the wheel back which cause a skid. The system has been turned off since. Toyota is not doing anything to repair anything and keep giving me the car back saying its fine.

I've had the car for 6 months. After a few months we noticed a "bucking" during acceleration and a "hesitation" when pressing the accelerator. Under medium to hard acceleration the car will exhibit these traits almost consistantly and now after 3500 miles it has become so noticeable that it is dangerous! The hesitation is "off the line" from a dead stop. There is at least a couple second delay sometimes when leaving a stop. And then as the car climbs in RPM's you can feel the engine struggling almost like a car with bad spark plug wires. It tends to "spit and buck" as it is accelerating. We have tried different fuels, fuel cleaners, different octanes, and nothing seems to curb the problem. We took the car to our local dealer and they confirm the problem but have stated that there is nothing they can do as it appears to be a software issue with the car. I have requested from Toyota using their "Brand engagement center" to provide an engineer to evaluate the car and so far have not heard back from them in almost a week.

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

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.

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.

Vehicle unpredictably hesitates during light to moderate acceleration in all driving modes (Sport, Normal, and Eco). This is especially dangerous when crossing in front of oncoming traffic from a stop or slow speed. Had a certified mechanic drive the car and verify the problem, but the car's systems don't report that there is a problem, so he had no answers.