What is a fender cover used for in the engine compartment?

A fender cover is specifically designed to protect the painted surfaces of a vehicle, particularly around the engine compartment. When working on the engine, tools, and other equipment can inadvertently scratch or damage the paint on the fender and surrounding areas. By using a fender cover, mechanics can prevent scuff marks, scratches, and other cosmetic damage that might occur during repairs or maintenance. This helps maintain the vehicle’s appearance and resale value.

Options like improving airflow or reducing noise do not apply to the primary function of a fender cover. While aesthetics is a consideration for some aftermarket options, the main purpose revolves around protection from damage. Hence, protecting the vehicle's painted surfaces is the primary reason for using a fender cover in the engine compartment.