The car chassis is technically the "skeleton" of the car. This skeleton is what your car's body is built on, and it bears the weight of the body and car parts. A car chassis is made of steel and includes parts such as tires, car engine, the axle system, car's transmission, steering system, the brakes, and suspension.
The chassis is essentially the framework that provides structural support for the vehicle, and it serves as the foundation for mounting all other components, including the engine, transmission, suspension, wheels, and body.