How Fuel Tank Parts and Accessories Work

The fuel filler neck is a key component that connects the fuel filler port to the fuel tank. It provides a pathway for the fuel to enter the tank safely. Fuel tank parts and accessories are typically made from durable materials like metal or rubber; however, over time, they can wear out and require replacement.

When a fuel nozzle is inserted into the filler neck, it triggers internal doors that ensure an airtight seal, preventing fuel vapor from escaping. One of the most vital fuel tank accessories is the gas cap (or fuel cap), which plays a cruc