[Animats]

Here's Tesla's supplier list.[1] Tesla makes the battery, motor, aluminum stampings, and plastic parts. They also now make their own seats and some of the circuit boards for the electronics. Everything else (steering, brakes, wheels, etc.) is outsourced. Makes sense; that stuff is standard.

[1] http://insideevs.com/wp-content/uploads/2013/03/tesla-info.j...