The main function of the car grille is to provide air intake and ventilation for the water tank, engine, air conditioning, etc. Secondly, it is to prevent damage to the internal components of the car compartment by foreign objects during driving, such as leaves or large objects, to protect the radiator and engine.

In automotive engineering, the grille is used to cover the vehicle body to allow air to enter. Most vehicles have a front mounted car grille, while other common ones are located under the front bumper, in front of the wheels, in front for cab ventilation, or on the rear trunk lid.

At present, the material of the metal mesh is mainly aviation aluminum as the substrate, because it is lighter than stainless steel substrate. Aviation aluminum is cheaper than stainless steel, so many manufacturers use aviation aluminum. The current grille is a symbol of the automotive brand, representing the identity of the car. Each brand's grille has its own characteristics, such as BMW's double kidney grille, Dodge's crossbar, Alfa Romeo's 6-grid shield, Volvo's strap grille, Audi's relatively new single frame grille, and so on. The grille is a unique design element, and many brands use it as their main brand identity.