Which brand of car is the best when you're going to buy one?

I like to buy BMW car.because it good looking as well as low maintainance car.that's it.

This is very hard. You can buy a car that is made by a well known company. But noone can guarantee you that it won't break down. I wouldn't look by its brand. I would buy rather used car with known history and find every single information about the car. You can find a lot of computer programms that show you when does you car need a servis, when to change parts etc. You can ask your mechanic if those cars have any weaknesses and problems and then you decide if you buy it. But even this technique can't help you because every car is unique and can break down. If you and your friend have the same car, if his car breaks down because of some software failure it doesn't mean that your car will to. This is lottery. Another thing is that you can by cars, that are "remaked". I will give you example because I know one. Citroen XSara 1997 had a lot of problems, and the Citroen decided to fix it with next version with xsara. And they did. Newer version almost doesn't have any problems. That's what I want to say. I would say, ask your friends if they know something about cars or your mechanic. They know the most. ;)