Answer:
In modern cars most of the car is made of polymers. A list of objects which are polymers in your car include:
Tyres, Electrical wires, car seats (if not leather), carpets, all things plastic in the car (dash if not leather) and even in some cases the car itsself is made of plastic. Alot of modern cars outer shell consists of plactic components. Plastic is easy to mould and easy to replace so is commonly found as your front or rear fender. easy way to tell if it is metal or plastic is to tap it. you can usually hear a difference between plastic and your metal components