If your car smells like gas, it can be a sign of a potentially serious issue. Here are the most common reasons why:

Fuel Leak
- From the fuel tank, fuel lines, fuel injector, or fuel rail.
- Look for puddles or spots under the car, especially near the rear or under the engine bay.
Faulty Gas Cap
- A loose, cracked, or missing gas cap can let fumes escape.
- Try tightening or replacing it — this is a cheap and common fix.
Evaporative Emissions System (EVAP) Leak
- This system prevents gas vapors from escaping into the air.
- A cracked charcoal canister, bad purge valve, or leaky hose can cause a strong gas smell, often without visible leaks.
Fuel Injector Leak
- Leaking around the injectors can produce a strong smell, especially in the engine bay.
Recent Refueling
- Spilled gas on the body or fuel vapors can cause temporary smells.
- If it goes away after a short drive, it's likely nothing serious.
Exhaust Leak
- If exhaust gases contain unburned fuel (often from a misfire), you may smell gas inside or around the car.

Do not ignore a strong gas smell, especially if it’s constant or inside the cabin.
Gasoline fumes are flammable and potentially harmful to your health.

Inspect the gas cap first.
If the smell persists: Have a mechanic check for leaks in the fuel system or EVAP system.