A fuel tank is much more than a glorified gas can bolted to the underside of the vehicle. In addition to being a reservoir for fuel, the tank on most modern vehicles houses the electric fuel pump and fuel gauge sender. Baffles inside the tank prevent fuel from sloshing away from the pump pickup and minimize noise, and the tank is a key component in the Evaporative Emission Control System (EVAP), which prevents fuel vapors from escaping to the atmosphere.

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The fuel tank is typically attached to the vehicle with retaining straps. The filler neck connects the tank to the body so fuel can be added. A pressure/vacuum relief fuel cap at the filler neck opening allows air into the tank as fuel is used while preventing the escape of vapors. A pressure relief/rollover valve is mounted to the tank to prevent pressure buildup, allow vapors to flow to the EVAP canister, and prevent fuel flow in case of vehicle rollover.

Fuel tanks are manufactured from metal or plastic. Metal tanks start out as sheets of steel or aluminum that are then stamped and welded together. Plastic tanks are formed from High Density Polyethylene (HDPE) that is blow molded into shape. Regardless of construction, all fuel tanks and filler necks exist in the harsh undercar environment, where they are subject to rain, snow, ice, dirt, road salt, and debris. Corrosion can compromise the structural integrity of metal tanks, to the point of perforation and fuel leaks. Temperature extremes and vibration can cause plastic tanks to crack and leak, and both types can suffer impact damage.

In addition to external corrosion, steel tanks can also rust inside. Rust particles and other contaminants can clog the fuel pump strainer and fuel injectors, resulting in reduced fuel flow and drivability problems. This restriction can also overwork the fuel pump, causing it to fail. In fact, fuel tank contamination is one of the major causes of fuel pump failure, and if not addressed, can cause a replacement pump to fail prematurely. A rusted fuel tank can be difficult to clean thoroughly. Why risk further problems or compromise your safety when we can provide you with a quality, direct fit, affordable replacement tank.

Our replacement fuel tanks and fuel filler necks are made to OE specifications for a perfect fit, and they’re coated to resist corrosion and provide long lasting durability. Each tank is factory leak tested and comes with a new locking ring and seal where applicable. We even offer fuel tank assemblies that come complete with a new fuel pump. Metal tank straps experience the same degree of corrosion, and to ensure a safe, secure mounting we recommend they be replaced along with the tank. We also offer standard and locking fuel caps, gaskets, rollover valves, and filler neck sleeves – everything needed for fuel system repair.

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Guides & Articles

  • Replacement Fuel System Parts
    How To Replace An In-Tank Fuel Sending Unit
    A Fuel tank sending unit is a term for the mechanical assembly inside your fuel tank which measures the level of liquid in the tank, then reports its findings to the fuel gauge on your instrument cluster. All sending units contain a "float" piece which does just what it describes - floats atop the surface of the fuel. Many automakers design the float piece as an attachment on a hinged arm that pivots as the level in the tank rises or drops. Others design the float piece as a cylinder that rides up and down around a metal shaft.

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Fuel Tanks Reviews

Average rating:  4.5  4.7 - 68 reviews
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5 of 5
Great Product
The product looks fantastic, it is a very good fit for the car! The pricing was excellent and was very easy to install. I would recommend CARiD to all my friends and family.
DPosted by David (Middlesex, NJ) /
2012 Nissan Sentra
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