Spectra Premium fuel tank lock ring LO186 — OE-fit replacement, corrosion-resistant seal for fuel modules

Spectra Premium LO186 is a direct-fit fuel tank lock ring engineered to replace the factory part and create a reliable, leak-resistant seal between the fuel module and tank.

Built to meet or exceed original equipment standards, this lock ring is manufactured from durable, corrosion-resistant materials and designed for a precise fit on application-specific fuel modules and tanks. It’s intended for use whenever the fuel tank or fuel module is serviced or replaced, offering the same form, fit and function you'd expect from OE components while helping prevent costly fuel leaks and vapor loss.

How does the LO186 lock ring ensure a proper seal?

The LO186 uses the original equipment geometry and material specifications to match the mating surfaces of the fuel tank and module. That exact fit reduces gaps and micromovements that can cause seepage or vapor leaks over time.

• OE-matched dimensions for a secure mechanical fit
• Corrosion-resistant construction to maintain sealing integrity
• Designed to resist warping and deformation under fuel exposure

When should I replace the fuel tank lock ring?

Replace the lock ring whenever you remove or change the fuel module or the fuel tank, or if the original ring shows signs of corrosion, cracking or loss of elasticity. Swapping it during service is a small cost that helps avoid future fuel leaks and returns the assembly to OE spec.

• Every fuel module replacement or fuel tank service
• If the ring shows rust, cracks, or flattened sealing surfaces
• After prolonged exposure to road salts or harsh environments

Will this lock ring fit my vehicle and match OEM parts?

Spectra Premium LO186 is an application-specific part engineered to meet original equipment fit, form and function. Verify fitment using vehicle year, make and model or the part number to ensure compatibility before purchase.

• Designed to replicate OEM geometry for proper installation
• Manufactured with quality control to match OE tolerances
• Works with corresponding Spectra or OEM fuel modules where specified

What benefits come from using a new OE-style lock ring?

Installing a new OE-quality lock ring restores the fuel system’s sealing performance, decreases the risk of leaks and vapor intrusion, and increases long-term reliability of the fuel module assembly. It’s a low-cost preventative measure with clear safety and environmental advantages.

• Prevents fuel leaks that can lead to costly repairs
• Reduces fuel vapor emissions and related odors
• Extends service life of the fuel module and tank components

Who is this for: technicians, DIY mechanics and fleet managers who replace or service fuel tanks and modules and need a dependable, OE-equivalent lock ring. If you’re restoring sealing integrity after fuel system work or replacing a corroded factory ring, the Spectra Premium LO186 provides a precise replacement engineered to last under normal fueling conditions.