All codes,you must go to career and select code entryand enter them in capital letters
$2,000:1ma9x99
$4,000:w2ioll01
$8,000:l1is97a1
$10,000:1mi9k7e1
$10,000:cashmoney
$10,000:reggame
Audi tt:itsaboutyou
Chevelle ss:horespower
Coke zero golfgti:cokezero
Dodge viper:worldslongestlasting
Mitsubishi lancer evolution:mitsubishigofar
Unlock all bonuses:unlockallthings
5 repair markers:safetynet
Energizer vinyl:energizerlithium
Castrol syntec vinyl:castrolsyntec[you get $10,000 with it]
Don't forget to capitalize all of the letters!!!!!!!!!

Sonic998

Go to code entry in career mode and type the following

CODE Results

UNLOCKALLTHINGS Master Code
SAFETYNET 5 repair markers (use only once)
CASHMONEY 10,000 (we think you can use this once a day)
HORSEPOWER Unlocks Chevolet Chevelle SS
ZEROZEROZERO Gives Coke Zero Golf GTI
MITSUBISHIGOFAR Gives Mitsubishi Lancer Evolution

Also for 10,000 easy multiple times go to the very first battle machines and dominate it then when you are picking your card press and hold the right button down. When it is going fast press the 2 button it should be 10,000. This has worked for us every time we did it but it may just be cowincedence good luck.