When it comes to Need for Speed Most Wanted, there are actually only a few cheat codes that you can use to unlock certain challenges, cars, and more without completing a special area or difficulty. So, here are the few that are out there for this PS2 console game:
To Unlock the Burger King Challenge, hit Up, Down, Up, Down, Left, Right, Left, Right in that specific order. This will unlock a special, fun to play challenge that you'll love.
To unlock the Syntec Ford GT, hit Left, Right, Left, Right, Up, Down, Up, Down in that specific order, and you'll get this awesome car to drive.
To unlock the Junkman Engine Part for your car, simply hit Up, Up, Down, Down, Left, Right, Up, then Down in that specific order and you'll gain this part for your cars.
To unlock the Porsche Cayman to cruise around in, hit the following: L1, R1, R1, R1, Right, Left, Right, Down in that specific order (make sure that you hit the R1 three times in a row), and you'll get this super sweet ride.
To unlock the Castrol Ford GT, hit Up, Down, Up, Down, Left, Right, Left, Right and you will unlock this car to add to your collection.