Lemon Law - tawse
tinyurl.com/db4xg6

Interesting law in the US for new cars - four chances to fix by the dealer and then you get your money back.
Lemon Law - TheOilBurner
The only problem I see with this is that unless the car is immobile, the dealers would surely just deny the fault was there at all?
Lemon Law - yorkiebar
as far as i can see, it is about as precise as you could ever get, and as a trader I would welcome it for new cars.

For 2nd hand though the perennial problems happen again !