Product Overview

The fuel tank filler cap, OEM number 31180-5HA00, is fitted to the Hyundai Mighty II, HD35, HD65, HD72, and HD78 commercial truck lineup, covering production from 1998 onward. As a routine wear and security item on a widely used commercial truck platform across Southeast Asia, Africa, and the Middle East, this filler cap sees consistent, repeat demand from distributors and workshops servicing Hyundai truck fleets.

A worn or damaged filler cap typically shows up as fuel odor near the fuel door, difficulty securing the cap, or a loose-fitting seal allowing dust and moisture into the tank. GSK Auto manufactures this filler cap to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

31180-5H000, 31180-5H0000, 31010-4B000

(Confirm against your VIN or chassis code before ordering — these are commonly listed cross-references for this application, not a guarantee of exact fitment for every variant. Includes keys.)

What Is a Fuel Tank Filler Cap?

Function: The fuel tank filler cap seals the fuel tank opening, preventing fuel vapor loss and keeping dirt, water, and debris out of the fuel system, while often providing a locking mechanism for security.

Working Principle: The cap threads or locks onto the filler neck, creating a sealed closure over the fuel tank opening. Locking versions require a key to remove, helping deter fuel theft or tampering.

Importance: On a commercial truck platform, a properly sealed and secured filler cap is essential for preventing fuel loss, contamination, and unauthorized access to the fuel supply.

Common Failures & Signs: Fuel odor noticeable near the fuel filler door. Difficulty inserting or turning the key to lock or unlock the cap. Loose or worn seal allowing dust and moisture into the tank. Cap that won't stay securely closed.

Key Features

OEM-standard fitment - matches factory thread and locking specification for the 31180-5HA00 application.

Includes keys - complete locking cap and key set for security.

Durable construction - built to withstand sustained outdoor exposure and daily use.

Excellent fitment - direct drop-in replacement, no modification required.

Tested before shipment - every unit checked for proper seal and locking function before packing.

Reliable performance - restores factory sealing and fuel system security.

Benefits

Importers - covers a routine wear and security item with steady, repeat demand from the Hyundai Mighty II/HD-series truck platform.

Wholesalers - consistent turnover as a standard service part for commercial truck fleets.

Repair Shops - tested unit reduces comeback risk on a quick, straightforward repair.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored fuel system security and sealing.

Packaging & Shipping

Standard export cartons. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This filler cap is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing fuel tank filler caps for the Hyundai Mighty II, HD35, HD65, HD72, or HD78? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.