Hyundai H-1 Diesel Fuel Tank Filler Cap Cover 31010-3A901

Hyundai H-1 Diesel Fuel Tank Filler Cap Cover is an original component from the Fuel filler flaps and caps group, designed for diesel fuel systems. It ensures a tight seal of the filler neck, stabilizes the fuel system operation, and helps maintain the proper performance parameters of the diesel engine.

Specifications and technical data

• SKU: 31010-3A901
• Mark: Hyundai
• Condition: Used
• OEM Part Number: 31010-3A901
• Substitutable numbers: 31010-3A901, 3 101 0-3 A9 01
• Fuel type: Diesel
• Category: Fuel Tank Caps

Purpose and technical function

The diesel version of the fuel filler cap is responsible for a controlled, secure closure of the fuel tank neck, limiting evaporation and the risk of contaminants entering the system. For Hyundai H-1 vehicles, a correctly selected cap is essential for the stable operation of the fuel system, especially during intensive use and frequent refueling cycles.

The element was designed as an original Hyundai part, which translates into a perfect fit for the filler neck geometry, appropriate sealing characteristics, and compatibility with the diesel fuel system used in this model.

Construction and fit for the diesel fuel system

The fuel filler cap for diesel units is constructed with the specific properties of diesel fuel in mind – its density, chemical properties, and sealing requirements. The applied design solutions help maintain:

• stable pressure within the fuel tank,
• protection against the ingress of dirt and moisture,
• proper operating conditions for fuel system components, such as lines, the pump, and injectors.

As a result, the cap supports consistent engine fueling, which is important for both the durability of the equipment and fuel economy.

Condition, origin, and benefits of using a used part

The offered cap comes from the Hyundai used parts segment. In practice, this means the opportunity to obtain an original component with factory geometry and fit, while reducing costs compared to a new replacement. For many Hyundai H-1 users, this is a reasonable compromise between quality and maintenance budget.

Using an original fuel filler cap allows for maintaining the structural integrity of the fuel system, which is particularly important in diesel engines sensitive to leaks and contamination. This is a practical solution when replacing a damaged, worn, or faulty cap that may cause issues with refueling or vehicle operation.

Support for selection and operation

To maximize the potential of the fuel system in your Hyundai H-1, it is worth ensuring regular inspection of components such as the cap, lines, pump, or injectors. A detailed discussion of operating principles and diagnostics can be found in the article: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where the importance of tank tightness and correct component selection by OEM numbers is described, among other things.

If you want to better understand how to safely purchase components from the secondary market and what to look for when verifying manufacturer markings, the following guide will be helpful: how to professionally select used car parts, avoiding bad purchases. This is practical support when planning repairs and vehicle upgrades.

Expanding your Hyundai fuel filler upgrade

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Hyundai and need other elements from the same group, such as additional caps, flaps, or filler covers, check out the available parts in the Hyundai fuel filler flaps and caps category.