Gates 31846 Fuel Tank Cap

Gates 31846 Regular Locking Fuel Cap

The Gates 31846 Regular Locking Fuel Cap is a direct replacement fuel tank cap for a wide range of Hyundai and Kia vehicles. It combines a lockable design with emission-control venting to help maintain proper tank pressure while limiting fuel vapor escape.

Key Features

• Lockable regular fuel cap for added fuel tank security
• Quick-On cam type for straightforward cap engagement
• Emission-control venting with two-way pressure relief and vacuum relief
• Built to meet OEM specifications and Federal and State emission requirements
• Thread diameter: 1.78 in; shell diameter: 2.9 in; depth: 2.61 in

Product Details

Gates Regular Locking Fuel Cap part number 31846 is engineered for vehicles that use a regular locking fuel cap with Quick-On cam action. The cap is designed to help the fuel system breathe through controlled pressure and vacuum relief while reducing the release of fuel fumes. This makes it a practical replacement for drivers servicing Hyundai Elantra, Hyundai Sonata, Kia Forte, Kia Soul, and other listed applications.

This part cross-references Four Seasons 35075 for the same application.

As part of the Gates Regular Locking Fuel Cap line, this cap focuses on OE-style fit and emission-control function rather than universal coverage. If you need a replacement fuel tank cap for a Hyundai Elantra, Kia Sportage, or Kia Optima, Gates 31846 is built around the specified locking and venting requirements for those vehicles.

Common Reasons to Replace

• Fuel cap warning light or evaporative emissions fault related to a loose or worn cap
• Damaged locking mechanism that no longer secures the fuel tank opening
• Cracked, warped, or worn sealing surfaces
• Fuel vapor odor around the filler area
• Loss of proper tank pressure control during refueling or operation

Installation Notes

Verify the existing cap style, thread diameter, and cam type before installation. This cap is listed for regular locking fuel cap applications with Quick-On engagement and emission-control venting. Confirm vehicle-specific fitment for your exact year, make, and model, including early 2011 INFINITI applications and California-emission notes where listed.

Compatible With: Fits 2020-2025 Hyundai Palisade, N/A; Fits 2021-2025 Kia Seltos, N/A; Fits 2010-2024 Kia Forte, N/A; Fits 2020-2024 Kia Forte5, N/A; Fits 2021-2024 Kia K5, N/A; Fits 2010-2024 Kia Soul, N/A; Fits 2004-2021 Hyundai Elantra, N/A; Fits 2006-2021 Hyundai Sonata, N/A; Fits 2006-2020 Kia Optima, N/A; Fits 2005-2022 Kia Sportage, N/A.

Quality Assurance

Gates states that this locking fuel tank cap meets OEM specifications and Federal and State emission requirements. The two-way pressure relief and vacuum relief valve design supports controlled tank breathing while helping limit fuel vapor escape.