This is a hilarious segmeent from BBC's Top Gear show, in which Jeremy Clarkson evaluates a Tesla roadster, and breaks 2 of them. The first one overheats its motor, and has to be parked for a while, and the second one has a brake failure. Clarkson also reports that he only got 55 miles range out of the car.
This shows how difficult it really is to be in the car business and build a quality product--there are more ways for cars to break than they have parts. Even starting with an existing platform (Lotus Elise), the Tesla apparently isn't ready for mass market use.