Genuine OEM Jaguar Fuel Filler Cap, part number C2D33850. This essential component is designed to securely seal the fuel tank opening, preventing fuel evaporation, contamination, and maintaining the correct pressure within the fuel system. It features a tether to prevent loss and a 'click' mechanism to indicate proper tightening. Weighing 0.08 kg, it is made from durable black plastic. Using a genuine OEM fuel filler cap ensures proper sealing and compliance with emissions regulations, preventing 'Check Engine' light issues related to fuel system leaks.