If fuel is leaking from your gas tank, it is a serious safety hazard. Fuel leaks can lead to fire risks, environmental damage, and wasted fuel. The issue may be caused by rust, cracks, or damage to the tank or fuel lines. Immediate inspection is essential to locate the source of the leak and prevent further danger.

What does it mean if fuel is leaking from the gas tank?

This usually means the tank itself is damaged or corroded, or the connections to the filler neck, fuel pump, or fuel lines are leaking. Even small leaks can release fumes that are highly flammable and harmful.

Common causes of a gas tank fuel leak

• Rust or corrosion on the fuel tank
• Cracks or punctures from road debris
• Leaking seals or gaskets around the fuel pump or sender unit
• Loose or damaged filler neck connections
• Damaged fuel lines attached to the tank

Why do you need to fix this problem quickly?

Fuel leaks are extremely dangerous. Escaping fuel can ignite if exposed to heat or sparks, and inhaling fumes is hazardous to health. A leaking gas tank should never be ignored.

How do you know when to get it checked?

You should book an inspection immediately if:

• You smell petrol or diesel around or under your vehicle
• You see fuel spots or puddles beneath the car
• Your fuel economy drops suddenly
• The Check Engine Light or EVAP warning appears
• You notice visible rust, wetness, or damage on the tank

What happens during an assessment?

A mechanic will:

1. Inspect the tank, filler neck, and fuel lines for leaks
2. Check seals and gaskets around the pump and sender unit
3. Pressure test the fuel system if necessary
4. Advise whether the tank can be repaired or needs replacement
5. Ensure no fuel vapours are escaping after repair

How much does it cost to fix?

Minor seal or line repairs may cost $200–$500. Full gas tank replacement typically ranges from $900–$2,000+, depending on the vehicle and parts required.

Is it unsafe to drive with fuel leaking from the gas tank?

Yes. Driving with a fuel leak is extremely unsafe due to the risk of fire, explosion, or engine failure. The vehicle should not be driven until inspected and repaired.