Off Road (Wii)
This game is titled Ford Racing: Off Road in North America and Off Road in Europe.
Career mode: Getting better cars
If you get to a Challenge or any race in which you find too difficult to win with your car, go back to a previous challenge or a race that offers good money that you can easily win. You can still win money even though you have already completed that race or challenge. Keep redoing that race or challenge until you get to the desired amount for a good car.