Money
You can acquire new cars and items by accumulating money in "Need for Speed: ProStreet." To get money fast, go to the "Codes" section of the main menu and input these cheats. You'll unlock $2,000 in the game by entering "1MA9X99." To get $4,000 instantly, type in "W2IOLLO1." Unlock an extra $8,000 by entering "L1IS97A1." To instantly gain $10,000, you must enter "REGGAME," "1MI9K7E1" or "CASHMONEY." These codes can be used as many times as you'd like, and they can also be combined to generate funds.
Items
You can unlock special items in "Need for Speed: ProStreet" by entering codes as well. To unlock five special repair tokens that will fix any car, enter "SAFETYNET" in the "Codes" screen. You'll unlock an extra vinyl sticker for your car of choice by entering "ENERGIZERLITHIUM." A Castrol Syntec Oil vinyl sticker is unlocked once you type in "CASTROLSYNTEC." To get the Progressive vinyl sticker, enter "ITSABOUTYOU." To remove all of the unlocked items and start from scratch, enter "LEIPZIG."
Cars
Many of the cars in the PlayStation 2 version of "Need for Speed: ProStreet" are not available at the start of the game; they must be unlocked by accomplishing tasks or going to the "Codes" screen to enter passwords. Once you win a race in Career Mode against the Drag King, the 2006 Mustang GT is unlocked. To unlock the 2008 Evo X, you must win the race in Career Mode against the Showdown King. You must enter the code "ZEROZEROZERO" to unlock a car bearing the Coke Zero logo. To unlock the Mitsubishi Lancer Evolution car while playing in Career Mode, enter "MITSUBISHIGOFAR."