Opuiue Inner Fuel Tank Cap for Volkswagen & Audi — Replacement 5C0201550T, ABS with Rubber Seal

Opuiue Fuel Tank Inner Cap is a direct-fit replacement fuel cap for many Volkswagen and Audi models, restoring a tight seal and helping prevent fuel vapors and check-engine light triggers.

If your vehicle shows a fuel-cap-related warning, emits fuel odor near the filler, or the original cap is cracked or loose, this Opuiue inner gas cap offers an inexpensive way to address common sealing issues. Manufactured from durable ABS plastic and a high-quality rubber seal, it’s built to resist temperature changes and maintain a reliable seal that helps keep contaminants out of the tank.

Which Volkswagen and Audi models will this cap fit?

This Opuiue inner cap is designed as a compatible replacement for a broad list of VW and Audi vehicles manufactured in defined year ranges. Always verify the OEM part numbers or check fitment with your VIN before ordering to ensure compatibility.

• VW: Jetta (2011–2020), Golf/GTI (2015–2020), Golf R and SportWagen (2015–2019), Alltrack (2017–2019), Tiguan (2018–2020).
• Audi: A3/A4/A5 variants (selected years), A8 Quattro (2011–2018), S4/S5/S8 (various 2008–2018 ranges).
• Also fits Q5, Q7, RS5, SQ5 and Audi allroad variations within listed years.

How does this cap improve fuel system performance?

Replacing a failing fuel cap with this Opuiue unit restores proper tank sealing and reduces vapor leaks that can cause a check-engine light or fuel odor. It doesn’t alter fuel delivery, but it helps maintain the evaporative emissions system’s integrity.

• High-quality rubber seal reduces vapor escape and water ingress.
• ABS construction retains shape across temperature extremes.
• Restores proper pressure/vacuum sealing for EVAP system function.

Is installation difficult and what tools are required?

Installation is intentionally simple and usually requires no tools: remove the old inner cap and twist the new Opuiue cap into place. If your vehicle uses a tether or additional retainer, make sure to transfer any mounting hardware before final fitment.

• No specialty tools required; hand-tighten to confirm fit.
• Ready to install out of the box; swap and rotate to lock.
• Check fitment against original part number to avoid incorrect fit.

When should I replace the fuel tank cap?

Replace the cap if it shows visible cracking, the seal is flattened, you detect fuel smell near the filler, or the vehicle’s engine management light indicates an EVAP system fault. Proactive replacement can prevent minor leaks from becoming diagnostic issues.

• Visible wear, cracks, or torn rubber gasket.
• Persistent fuel odor around the filler area.
• Check engine light related to EVAP or fuel cap loose codes.

Who is this for: Drivers of compatible Volkswagen and Audi models who need a reliable, affordable fuel tank inner cap replacement. It’s aimed at DIY mechanics, fleet maintainers, and vehicle owners who want to correct vapor leaks, stop fuel odors, or clear fuel-cap-related diagnostic codes without replacing larger EVAP components.