Warranty that does not cover anything = waste of money
I bought my car with "3 year full warranty"
It covered Engine (up to $1500 or something), Gearbox ($1000) turbo $500 and thats about it.
The warranty was ONLY valid if the car "was not modified from manufacture specifications"
I bought the car with a few mods on it, and when i had problems the warranty wouldnt cover any of it because the car was not stock.
The fact that the dealer modified the car before it was transported to me did not matter, they actually void the warranty before I got the car. The dealership does not actually offer the warranty they "buy" it from someone else, an external company.
Read the fine print carefully with warranty, it may seem like "fool proof" cover, but you will find that a LOT of the time they wont cover much at all, and it is VERY easy to void.