Fuel leak or gas smell outside the car

Symptoms

• Strong gasoline smell near the car when parked
• Visible wet spot or puddle under the car, often near the tank or engine
• Fuel gauge dropping faster than expected
• Possible staining or dampness under the rear of the car

Likely causes

• CommonCracked or corroded fuel lineRubber or metal lines can crack with age, especially in cold climates.
• PossibleDamaged fuel tankRust-through or impact damage can create a slow or steady leak.
• PossibleLoose or failed fuel filter connectionA fitting near the filter can loosen or its seal can fail.
• PossibleLeaking fuel injector or fuel railA leak in the engine bay can drip down and pool under the front of the car.
• Less commonFailed filler neck or hoseThe hose from the fuel door to the tank can crack, especially after a fender-bender nearby.

What to do

1. Do not start the car near an active fuel puddle if you can avoid it, and don't smoke or use open flame nearby.
2. Look underneath (car off, on level ground) to spot exactly where fuel is dripping from.
3. Check the color and smell to confirm it's fuel rather than another fluid; gasoline is thin and smells strongly of gas.
4. If it's actively dripping, have the car towed rather than driven to a shop.
5. If it's a very slow or intermittent leak, drive minimally and get it to a shop as soon as possible.
6. Have the exact source repaired, whether it's a line, tank, or fitting, and don't just patch a fuel leak temporarily.

Tools and parts

• Flashlight
• Cardboard to check under the car for drips

When to call a pro

This should go straight to a repair shop; fuel system leaks need to be found and repaired properly, not patched.

Safety