A wheel arch is the curved space above a vehicle's wheel, designed to accommodate the wheel's movement and suspension system. It helps protect the wheel and tire from debris and provides clearance for the wheel to turn without obstruction. Wheel arches are an essential part of a vehicle's body structure, contributing to aerodynamics and aesthetics. They can vary in size and shape depending on the vehicle type, such as sedans, SUVs, or trucks. Proper design ensures that the vehicle maintains stability and performance while driving.