Some of the toughest races in Need for Speed: Carbon really needs a little extra help, especially the Canyon Race against Darius. Some infinite nitrous could hurt nobody as well as the very useful speed breakers. Inputing codes through action buttons combinations got me nostalgic, because I thought that the term "codes" was something forgotten in the Playstation 2 universe. You'll need money if you want to have fun with the cars, tune them or buy new ones or some collection edition rides.

Infinite nitrous
At the title screen, press Left, Up, Left, Down, Left, Down, Right, Square. If you entered the code correctly, a message will appear.

Infinite crew charge
At the title screen, press Down, Up(2), Right, Left(2), Right, Square. If you entered the code correctly, a message will appear.

Infinite SpeedBreaker
At the title screen, press Down, Right(2), Left, Right, Up, Down, Square. If you entered the code correctly, a message will appear.

Need

For Speed Carbon Logo Vinyls
At the title screen, press Right, Up, Down, Up, Down, Left, Right, Square to unlock the Need For Speed Carbon Logo Vinyls. If you entered the code correctly, a message will appear.

Need For Speed Carbon Special Logo Vinyls
At the title screen, press Up(2), Down(4), Up, Square to unlock the Need For Speed Carbon Special Logo Vinyls. If you entered the code correctly, a message will appear.

Extra money
At the title screen, press Down, Up, Left, Down, Right, Up, Square, Triangle to get an extra $10,000 in Career mode. If you entered the code correctly, a message will appear. Note: This code can only be used once.

$10,000
Have a saved game file from Need For Speed: Most Wanted on your memory card to get an extra $10,000 in Career mode.

Burnout Vinyl
Have a saved game file from Burnout Revenge on your memory card to unlock the Burnout Vinyl under the bonus section of Vinyls.

Collectors Edition cars
Successfully complete the indicated event(s) in the Challenge Series to unlock the corresponding car:

Aston Martin DB9 (Exotic): Defeat Wolf in Boss Battle mode.
Dodge Charger RT Classic (Muscle): Defeat the 21st Muscle Car Gang.
Jaguar XK 2007 (Exotic): Successfully complete all three Turf War races.
Mazda RX7 (Tuner): Defeat Kenji in Boss Battle mode.
Nissan 240SX (Tuner): Successfully complete all three Checkpoint challenges.

Crew members
Successfully complete the indicated task to unlock the corresponding crew member:

Sal: Joins after four to six races.
Yumi: Joins after defeating Kenji/Bushido.
Colin: Joins after defeating Wolf/TFK.
Samson: Joins after defeating Angie/21st Street.
Nikki: Joins after defeating all three beginning Bosses.

Easy money
Once you have completed Career mode, set Samson as your wingman with Neville also in your crew. You can repeat any races you have already completed in which a wingman is used and recieve $750 for each race completed instead of the $500 without. This can also be used on first time races for maximum cash output.

An easy way to break one million in Career mode is to start a Muscle career. Complete two races in order to unlock the car lot. Then, go to your challenge series and unlock the Nissan 240 (last set of checkpoint challenges). Buy the car in your career. It is possible to complete the entire game with this car. It is important to start as a Muscle career so that you unlock Sampson first. Race the entire game with Sampson set as active and Neville in your crew. You can break one million with about ten races left over.

Easier Speedtrap races
Activate your Blocker/Brawler before the race. While racing and coming up towards a speed trap, stop your Blocker/Brawler. Your Blocker/Brawler will stop, crash the other car(s), and drastically slow down their time. Remember that the peak Blocker/Brawler moment is just before the speed trap.