That car part you need will be sculpted inside a 3D printer

the PopMechanics Brain Trust : scientist
Dentists are already using this modern tech wonder to transform laser scans of your mouth into custom-fit appliances for your teeth. But that's a fraction of what the machine can do. When a 3D printer costs the same as, say, an HDTV, you will use one of your own to download all sorts of useful things, marveling as it creates each item layer by layer from plastic, rubber, titanium—you name it. Just imagine your future self printing a birthday cake, a Rolex, or a catalytic converter for the car. In time you'll even be able to download prescription medicine

Popular mechanics, (2012) "110 Predictions For the Next 110 Years", [online], Available: