2024 Toyota Highlander Fuel system Problems

I have been experiencing a gas smell issue with my Toyota Highlander near the rear of the car by gas cap area upon putting in gas and driving. The smell starts typically when it’s a hot day outside and I only usually get half a tank worth of gas. After getting gas and driving about 15-30 mins. Is when the smell of gas starts. I recently took my car it to the local Toyota dealership and they checked the purge valve, fuel canister and EVAP system. The technician did state that the fuel rail failed slightly. But overall, they stated there no codes after testing and the technician did state he smelled the gas faintly. But that since there are no codes to pinpoint an issue they cannot fix or figure out the issue. Please figure out this issue, as this is a real concern to have this issue and drive this car with myself and family in it.

NHTSA ID

11761388

Incident

Aug 1, 2026

Driving the vehicle a strong smell of fuel vapor is noticeable coming from rear driver side of vehicle by rear door and fuel cap area. This happens when car is driven for long periods of time or on hot days. I drive my car daily and it happens every day. Smell gets so bad it gets in to the cabin area. Causing me to get headaches or light headed feeling making it unsafe to drive. I have taken vehicle to the dealership but nothing was done. The only thing they said they could do is clean and disinfect my AC vents. This issue has been on going since I bought the vehicle brand new 0 miles when I purchased it. There are no warning lamps or messages that appear when the issue starts. After returning home I have to park my car out side for a few hours until the fuel smell goes away and it is safe to park in my garage. I have talked to other people who own the 2024 Highlander and they have stated they to have experienced the same issue also taking it back to the dealership but no fix for the issue. Please have Toyota find a fix for this issue it is a huge safety concern for the people and the environment for the amount of fuel vapors that this car releases.

NHTSA ID

11760159

Incident

Aug 26, 2026

There is a strong odor of gasoline coming from the car, to the point where the fumes are so strong they’re entering our home and making it very unsafe. We brought the vehicle to the Toyota dealership, and they said they couldn’t do anything about it. Keep in mind the car is still under warranty. Upon doing further research from Reddit, this seems to be a common issue with 2023+ Highlander and Grand Highlander models; however, Toyota is refusing to correct these issues. This is a hazard to say the least and something needs to be done asap!

NHTSA ID

11757582

Incident

Aug 1, 2026

Vehicle smells like fuel after engine toggles on and off between the hybrid system. This issue is intermittent, but when it is taken to the dealership they smell the fuel, with no luck duplicating the issue. I have also noticed when the smell is present the vehicle seems to run rough.

NHTSA ID

11732318

Incident

Feb 9, 2026

When the engine is running after hours a gasoline smell and vapor exit the tank by the cap.

NHTSA ID

11716387

Incident

Mar 6, 2024

What component or system failed or malfunctioned, and is it available for inspection upon request? THE CAR SMELLS OF GASOLINE, ESPECIALLY WHEN IT IS HOT OUTSIDE. THE SMELL TRAVELS IN THE CAR AND MAKES ME SMELL LIKE GAS AND ALSO THROUGH THE AIRV ENTS WHEN PARKED IN THE GARAGE. I DO NOT OVERFILL THE GAS TANK. How was your safety or the safety of others put at risk? WE ARE INHALING GASOLINE SMELLS ALL THE TIME AND IT IS UNSAFE Has the problem been reproduced or confirmed by a dealer or independent service center? NO THE DEALER AND THE INDEPENDENT CONTRACTOR SAY THEY CANNOT FIND THE PROBLEM BUT THEY DO SMELL THE GAS Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? THE TOYOTA DEALERSHIP AND INDEPENDENT CONTRACTOR HAVE LOOKED AT IT Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? NO WARNING LIGHTS HAVE APPEARED DURING THE TIMES WE SMELL THE GAS

NHTSA ID

11656172

Incident

Jan 28, 2024

Strong smell of fuel after a hot day. This is a new vehicle purchased new on 2024. No warning lights On dashboard. After reading a few threads about the same situation on newer highlanders it seems like it's being ignored.

NHTSA ID

11654245

Incident

Apr 11, 2025

The contact owns a 2024 Toyota Highlander. The contact stated there was an abnormal fuel odor inside the vehicle's cabin coming from the rear of the vehicle near the fuel tank. No warning light illuminated. The vehicle was taken to the dealer where it was diagnosed that the vent valve remained open causing fuel to leak from the fuel tank and as a result the fuel cap needed to be replaced. The vehicle was repaired however the failure persisted. The failure was intermittent. The contact stated that the odor was extremely strong, causing the driver to sustain headaches. The fire department issued a letter with a statement that there was a fume odor coming from the vehicle. The vehicle was taken to a different unknown dealer however, the dealer was unable to determine the cause of the failure. The vehicle was not repaired for the most recent failure. The manufacturer was made aware of the failure. The failure mileage was 2,000.

NHTSA ID

11607256

Incident

Jun 25, 2024

Mileage

2,000 mi