Gasoline smell inside the car

Symptoms

• Smell of gasoline noticeable inside the cabin, not just briefly after fueling up
• Smell may be stronger when the car is running or after driving
• No visible fuel puddle necessarily seen yet
• Possible rough running, hesitation, or reduced fuel economy alongside the smell

Likely causes

• CommonLeaking fuel injector or fuel line under the hoodA cracked line or a leaking injector seal can let fuel vapor or liquid escape near the engine, where it can be drawn into the cabin's air intake.
• PossibleLeaking or damaged fuel tank or fuel filler neckRust or physical damage to the tank or the neck connecting it to the fuel door can create a slow leak.
• PossibleLoose or missing gas capA loose or faulty gas cap can let fuel vapor escape and sometimes trigger a check engine light along with the smell.
• PossibleOverfilled fuel tank after a recent fill-upTopping off past the automatic shutoff can cause temporary fuel smell until it clears, though this should not persist long-term.

What to do

1. Check that the gas cap is properly installed and tightened, and inspect it for cracks or a worn seal.
2. Drive with windows cracked for ventilation and avoid smoking or open flames near the car until the source is found.
3. Have someone check under the car and under the hood for visible fuel wetness, staining, or a strong gasoline smell concentrated in one area.
4. Do not ignore a persistent gasoline smell, especially if it's strong, gets stronger over time, or is accompanied by a check engine light.
5. Have a mechanic inspect the fuel system (lines, injectors, tank, filler neck) as soon as possible, since fuel leaks are a fire hazard.

Tools and parts

When to call a pro

See a mechanic promptly for any persistent gasoline smell inside the car, since a fuel system leak is a fire risk and should not be diagnosed by guesswork alone.

Safety