An automobile frame is the structural foundation of a vehicle, providing support and shape. It is designed to hold various components, such as the engine, suspension, and body, ensuring they work together effectively. Frames can be made from materials like steel or aluminum, which offer strength and durability. There are two main types of frames: body-on-frame and unibody. A body-on-frame design features a separate frame and body, allowing for easier repairs and modifications. In contrast, a unibody frame integrates the body and frame into a single unit, which can enhance safety and reduce weight, improving fuel efficiency.