Once you reach Razor in the Blacklist (the very last person), you must do five races. On the circuit, take as many shortcuts as you can to win. If you do not do this, he will win by a minute. Also, it is recommended that you have the best parts in your car (Junkman). Once you win those five races, you will get your BMW back. However, in order to keep it you must evade a very long pursuit. You will start with a wanted level of 6. You will have large SUVs, very fast black C5s, and even helicopters after you. Once you start the pursuit, swerve off to the left to hit the bridge-like object, and get most of the cops off your tail. After hitting that, keep to the right. You will go through a construction site. Keep to the right to hit yet another bridge-like object, and lose most of your pursuers. Ahead you will soon see a gas station. Try to hit the gas tanks. Keep hitting things until about five minutes into the pursuit. Then, Mia will call and tell you where to go. Get there as fast as possible.