Need for Speed Carbon Cheats for Nintendo DS

At the Main Menu Screen enter Up, Up, Down, Left, A, B, B, A to get infinite nitrous.

Unlockable Cars
In the Challenge Series menu complete the following events to unlock the corresponding car.
Unlock Mazda RX7 (Tuner):
In the Boss Battle beat Kenji.
Unlock Nissan 240SX (Tuner):
Complete ALL 3 'Checkpoint' challenges.
Unlock Aston Martin DB9 (Exotic):
In Boss Battle mode beat Wolf.
Unlock Jaguar XK 2007 (Exotic):
Complete ALL 3 'Turf War' races.
Unlock Dodge Charger RT Classic (Muscle):
Beat the 21st Muscle Car Gang.

Unlock Crew Members
Successfully complete the indicated task to unlock the corresponding crew member:
Unlock Nikki:
Joins after defeating ALL 3 beginning Bosses.
Unlock Sal:
Joins after 4-6 races.
Unlock Yumi:
Joins after defeating Kenji/Bushido.
Unlock Samson:
Joins after defeating Angie/21st Street.
Unlock Colin:
Joins after defeating Wolf/TFK.