2023 Toyota Highlander fuel system problems

Filed Jul 30, 2026 · Fuel system · AZ

Vehicle has strong gas smell and has gas vapor streaming out from under rear driver side wheel well and gas cap area.

Filed Jun 16, 2026 · Fuel system · AZ

This 2023 Toyota Highlander XLE AWD has a recurring gasoline/fuel odor that began while the vehicle was still within the basic warranty period. The concern was reported to Toyota/dealer multiple times. At first, the odor was intermittent and difficult to duplicate, but the problem continued after repeated dealer visits. The fuel smell was later duplicated/confirmed while the dealer was open, before approximately 60,000 miles, but the vehicle was still not properly repaired. The odor has continued and recently occurred multiple days in a row. The smell has been noticed around/inside the vehicle and creates a safety concern because gasoline odor may indicate fuel vapor leakage or a fuel-system problem. Possible sources could include the fuel tank, fuel pump module or seal, filler neck, fuel lines, EVAP system, charcoal canister, purge valve, injectors, fuel rail, or another related fuel-system component. The vehicle has been inspected by a Toyota dealer multiple times, but the cause has not been identified or corrected. No warning light has clearly identified the source of the problem. The concern is especially serious because it involves fuel odor, possible vapor exposure, possible fire risk, and possible fuel-system failure. Occupants and others could be placed at risk if the odor is caused by a leak or defective fuel-system component. The dealer is now recommending removal/drop of the fuel tank for further diagnosis and quoted approximately $1,500 for that step. My concern is that full fuel-system diagnosis, including tank removal if needed, should have been performed earlier when the complaint was repeatedly made during warranty. The issue is not a new complaint; it is a continuing unresolved fuel odor concern that started during warranty and remained unresolved despite repeated dealer involvement. The vehicle and related components should be available for inspection upon request.

Filed Jul 20, 2025 · Brakes, Driver assistance · MI · crash · 1 injury

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.

Filed Nov 3, 2024 · Engine, Fuel system · AZ

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.

Filed Oct 10, 2024 · Fuel system · 40,000 miles · AZ

The contact owns a 2023 Toyota Highlander. The contact stated that while operating the vehicle, the odor of gasoline was present inside and outside of the vehicle. The contact indicated that the failure had occurred intermittently after refueling the vehicle on extremely hot days. The vehicle was taken to the local dealer who was unable to duplicate the failure and the cause of the failure was not determined. The manufacturer was notified of the failure. The failure mileage was 40,000.

Filed Oct 8, 2024 · Fuel system · NV

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.

Filed Sep 13, 2024 · Fuel system · TX

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.

Filed Sep 12, 2024 · Acceleration, Fuel system · KY

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.

Filed Aug 3, 2024 · Fuel system · TX

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.

Filed Jul 21, 2024 · Acceleration, Engine · MO

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.