Apart from a few unusual cars that have body panels made of plastic, aluminum or another metal, the vast majority of cars have body parts made from mild steel sheeting. Mild steel is mostly made from iron with a tiny amount of carbonmixed in it. If too much carbon is in the steel it becomes very brittle. Too little or none at all and it becomes too soft. In mild steel around 0.1 - 0.5% is carbon which keeps the steel strong without it becoming brittle.
Car door panels may be made of a number of different materials. Most of these panels are made from metal or plastics.
lots of bits :D anything from an alloy engine to plastic body panels
The cost for automotive body panels will change in price based on the type of car you have. Some cars might cost more just because of how old it is or what the material is made up of.
after market body panels.
Brass
Vehicle body panels, hoses, belts, gaskets, tires, clutches, brake pads, & body armor for vehicles can all be made of Kevlar.
To protect the metal from rust on a steel car. On an aluminum, or carbon fiber car it is not necessary to paint the car. As an example all DeLorean's were not painted from the factory as the body panels were made of aluminum.
In batteries the plates are made of lead. Body panels are often made of the compounds steel or carbon fibre. Some manufacturers use body panels that are made from the element Aluminum.
Before robotics became widely used, the car had a frame that was tubular steel rails. The body components were sheets of metal that were pressed into the shape that was required and those sheets became body panels. The panels where then installed by hand.
The Saturn has plastic body panels. No cars are completely made of plastic.
not unless you have solar panels on your car...
It depends on the car, but mainly drivetrain parts(motor, accessories, transmission) suspension, rims and sometimes body panels, frames, interior trim.