Genuine OEM Hyundai Fuel Tank Air Drain Housing, part number 31035A7010. This housing is a critical part of the fuel system's evaporative emissions control, specifically designed to enclose the air drain mechanism near the fuel tank filler. It ensures proper ventilation of the fuel tank while preventing fuel vapor escape. Using a genuine OEM housing guarantees precise fitment, durable materials resistant to fuel and environmental factors, and proper function for emissions compliance.