Fuel Tank & Fuel Filler Neck



Fuel System


Fuel Tank & Fuel Filler Neck

Sign up for latest news on Kowze aftermarket car parts.

Master more information about product, including discount, new arrivals, and hot sale.
Two Indispensable Parts in Fuel System: Fuel Tank & Fuel Filler Neck

The fuel system of any vehicle is one of the most important components that ensures its smooth and efficient operation. It is responsible for storing, delivering, and filtering fuel to the engine. Among the various parts that make up the fuel system, two of the most crucial components are the fuel tank and the fuel filler neck.

The fuel tank stores the fuel and ensures a steady supply to the engine, while the fuel filler neck helps with the refilling of fuel into the car. Without these two components, the fuel system would not be able to function properly, which would result in poor performance, decreased fuel efficiency, and even engine damage.


Fuel Tank

Fuel Tank Uses
A fuel tank plays a crucial role in the performance and fuel efficiency of a vehicle. The primary function of the fuel tank is to provide a secure and stable environment to store fuel, preventing it from leaking or spilling out during driving, as well as ensure that the engine is supplied with the right amount of fuel, which is necessary for optimal performance.

Also, the fuel tank helps to prevent the formation of vapor lock, which can occur when fuel in the lines or the engine gets too hot and evaporates, causing the engine to stall. The fuel passes through several filters before getting to the car engine. This is to ensure that it’s clean and conducive. A diesel filter, for example, removes impurities from diesel, such as water, dirt, and rust particles.

Meanwhile, a clogged fuel filter can cause a reduction in engine power, fuel economy, and even lead to engine failure, so a fuel filter body, which is attached near the engine, protects the filter from damage and allows for easy replacement.


Fuel Tank Construction
Fuel tanks are typically constructed from high-density polyethylene (HDPE) or metal, such as steel or aluminum. HDPE is a popular choice because it is lightweight, durable, and resistant to corrosion, which makes it ideal for use in fuel tanks. Metal fuel tanks are also durable and resistant to punctures, but they are heavier than HDPE tanks and susceptible to rust.

Fuel tanks come in different shapes and sizes, depending on the vehicle make and model. They can be cylindrical, rectangular, or even irregularly shaped to fit specific areas of the car’s chassis. They are typically located at the rear of the vehicle, underneath the trunk or the back seat, and are connected to the fuel pump through fuel lines.

The fuel tank has a fuel tank gauge unit, which provides information about the fuel level in the tank to the driver. The gauge unit typically consists of a float connected to a variable resistor, which changes its resistance according to the position of the float. This resistance is then converted into a voltage signal that is sent to the fuel gauge on the dashboard.


Fuel Filler Neck

A fuel filler neck is a component of the vehicle’s fuel system that connects the fuel tank to the fuel cap. Its primary function is to allow the driver to refill the vehicle’s fuel tank with gasoline or diesel. The fuel filler neck is a tube-like structure that is typically made of steel or plastic. It is designed to withstand the weight of the fuel as it flows into the tank and to resist the corrosive effects of the fuel.

Various vehicles have different types of fuel filler necks, which are designed to fit the specific fuel tank and fuel cap of that vehicle. For example, the Ford filler neck is designed to fit Ford vehicles, while the 57 Chevy gas tank filler tube is specifically designed for the 1957 Chevrolet model, and the 2009 Mitsubishi Galant fuel filler neck is designed to fit the 2009 Mitsubishi Galant model.

The fuel filler neck is an important safety feature in a vehicle’s fuel system. It is designed to prevent gasoline or diesel from spilling out of the tank during refueling, as well as prevent the escape of harmful fumes and vapors that can be produced by the fuel. Additionally, the fuel filler neck may have a vent that allows air to escape from the tank as the fuel flows in, which prevents pressure from building up in the tank.


The Symptoms of the Wrong Fuel Tank and Fuel Filler Neck

The fuel tank and fuel filler neck are essential components in a car’s fuel system. If the wrong fuel tank or filler neck (including 2010 Ford explorer fuel filler neck and Nissan filler neck) is used, it can lead to several symptoms that can cause significant engine damage. The symptoms can vary depending on the make and model of the car, but there are some common signs to watch out for.

  • Reduced performance of the engine. This can manifest as a loss of power, reduced acceleration, and even stalling. The engine may also produce unusual sounds or vibrations, indicating that it is not running correctly.
  • Inaccurate readings on the fuel gauge. The gauge will show an incorrect fuel level, or it may fail to register at all. This can lead to the driver running out of fuel unexpectedly, or to inaccurate readings that make it difficult to estimate how much fuel is left in the tank.
  • Fuel leaks, which can be dangerous due to the potential for fire. Fuel leaks can occur at the filler neck or around the tank, and they should be addressed immediately to prevent further damage.



Without the right fuel tank and fuel filler, the car’s operation will be compromised. It’s important to keep them in good working condition to prevent damage to the engine and ensure a long lifespan for the car.

Do you need help with your car’s fuel system, simply contact us and we will be glad to help!

Are Aftermarket Fuel Tank Safe & Worth It?

Kowze, a trusted aftermarket fuel tank supplier, can provide options for fuel tank upgrades. However, safety should remain a top priority. The quality of aftermarket tanks can vary, so ensure you’re choosing a reputable manufacturer.

For off-road enthusiasts or those seeking increased fuel capacity, aftermarket tanks can be a valuable addition. They often provide greater fuel range and durability, making long journeys more manageable.

On the flip side, some aftermarket tanks may lack the stringent quality control of OEM options, potentially posing safety risks. It’s crucial to research thoroughly, considering factors like material quality and compatibility with your vehicle.

Kowze: Premium Custom Fuel Tank Provider

Kowze has raw material sourcing teams, stylish designers, and manufacturing engineers to work together with our customers. We are an OEM & ODM aftermarket car parts supplier providing comprehensive solutions for cars and our clients.

Whether you need Nissan fuel tank or Mitsubishi Lancer fuel filler neck, we will be committed to making all-around bumper solutions to meet your requirements and specifications.

  • ODM and OEM are available, the small MOQ is 500 pcs for molding. If the conditions are satisfied, we can also provide an MOQ of less than 500 pcs.
  • Tough metal with collision avoidance system.
  • Win-win business for mutual benefits.


Every durable fuel tank is custom-made to the requirements and vehicle type of clients. The possibilities for its designs are limitless. Please tell us what you want, and we’ll make it happen. Our parts are the strongest and toughest in the industry.